Subjective experience and meaning of delusions in psychosis: a systematic review and qualitative evidence synthesis

Editorial: Progress and Challenges in Characterizing Psychiatric Symptoms and Behaviors in Suicidal Preadolescent Children

Historically, little clinical and research attention has been focused on suicide in preadolescent children because of the commonly held view that children at this age do not possess the cognitive capacity fully to comprehend death (eg, its finality) and therefore are incapable of experiencing suicidal thoughts and behaviors.1 This view may result in expressions of suicidal thoughts by preadolescent children being interpreted and treated as momentary expressions of distress, but not of actual desire or intent to engage in suicidal behavior. There is accumulating evidence, however, to urge caution against such an interpretation. Although preadolescent suicide occurs at a low base rate, it has been increasing, rising from the 10th leading cause of death in this age group in 2008 to the 5th leading cause of death by 2019 in the United States according to data from the US Centers for Disease Control and Prevention.2 Furthermore, in the general community, suicidal thoughts and behaviors have been found to occur at concerningly high rates among preadolescent children in a recent systematic review, with lifetime prevalence of 2.6% for suicide attempts and 15.1% for suicidal thoughts.3 In this age group, another form of self-injurious thoughts and behaviors (SITBs), nonsuicidal self-injury (ie, deliberate self-harm in the absence of suicidal intent), is also poorly understood and a significant concern, with a lifetime prevalence of 6.3% among preadolescent children in the general community. Accurate characterization of the psychiatric symptom and behavioral profiles of preadolescents with SITBs is an important step toward identifying children in need of intervention or preventive efforts to avoid these outcomes.

Service User Representation in Qualitative Research on Cognitive Health and Related Interventions for Psychosis: A Scoping Review

BACKGROUND AND HYPOTHESIS

Cognitive health in schizophrenia spectrum psychosis has received substantial empirical attention in recent decades, coinciding with the development and implementation of interventions including cognitive remediation. Subjective experience in psychosis, including qualitative explorations of service user perspectives, has also proliferated; however, there is no available synthesis of service user representation in the psychosis cognitive health literature. This scoping review investigated prevalence and characteristics of qualitative research reporting service user perspectives across the extant research on cognitive health and related interventions in psychosis.

STUDY DESIGN

We conducted a literature search on qualitative methods in cognitive health and/or related interventions across PubMed, Web of Science, and PsycInfo databases. The review followed the PRISMA-ScR guidelines for scoping reviews and identified 23 papers. Data extraction included study design and sample characteristics, qualitative methodology, and reporting.

STUDY RESULTS

Of 23 articles, 18 reported on user experiences of interventions, most often in the context of feasibility/acceptability for otherwise quantitative trials. Five studies described service user experiences of cognitive health separately from interventions. Only 3 included any service user involvement or participatory methods. Twenty articles reported any demographic characteristics, and fewer than half (11) reported any racial or ethnic sample characteristics. There was substantial variability in qualitative methodology and reporting across studies.

CONCLUSIONS

Qualitative methodology is lacking in its representation and rigor across the cognitive health literature for schizophrenia spectrum psychosis. Additional inclusion of service user lived experience is critical for future research to better characterize cognitive health and inform interventions to promote recovery.

Consistency of Delusion Themes Across First and Subsequent Episodes of Psychosis

Importance

Despite growing interest in the phenomenology of delusions in psychosis, at present little is known about their content and evolution over time, including whether delusion themes are consistent across episodes.

Objective

To examine the course of delusions and thematic delusion content across relapse episodes in patients presenting to an early intervention service for psychosis.

Design, Setting, and Participants

This longitudinal, observational study used clinical data systematically collected from January 2003 to March 2018 from a cohort of consenting patients with affective or nonaffective first-episode psychosis, followed up naturalistically for up to 2 years in an early intervention service for psychosis in Montréal, Quebec, Canada. Data included the thematic content and severity of delusions (scores ≥3 using the Scale for the Assessment of Positive Symptoms) and associated psychotic and nonpsychotic symptoms, both across an initial episode and, in the event of remission, a potential relapse. Data were analyzed from September 2021 to February 2023.

Exposure

An early intervention service for psychosis, organized around intensive case management and a multidisciplinary team approach, which observed each patient for up to 2 years of care.

Main Outcomes and Measures

The primary outcome was positive symptom relapse and remission, including the presence and content of delusions, which was coded per the Scale for the Assessment of Positive Symptoms and accepted definitions. The main statistical measures included repeated paired-sample t tests and binary logistic regression analyses.

Results

Of 636 consenting patients, mean (SD) age was 23.8 (4.75) years; 191 patients were female, 444 were male, and 1 patient was nonbinary. Remission rates were high, and relapse rates were relatively low: 591 individuals had baseline delusions, of which 558 (94.4%) achieved remission. Of these 558 patients, only 182 (32.6%) had a subsequent relapse to a second or later episode of psychosis. Of the 182 patients who did relapse, however, a large proportion (115 [63.2%]) reported threshold-level delusions. Of these 115, 104 patients (90.4%) had thematic delusion content consistent with that reported during the index (first) episode. Those who relapsed with delusions had fewer delusion themes present during subsequent episodes of psychosis compared with the index episode and lower levels of other psychotic and nonpsychotic symptoms.

Conclusions and Relevance

Specialized early intervention services for psychosis can achieve high rates of sustained remission. However, in this study, the minority of individuals with delusions who later relapsed experienced similar delusion themes during subsequent episodes. These findings raise important considerations for the conceptualization of delusions and have clinical implications for trajectories of illness and care.

From diagnosis to dialogue - reconsidering the DSM as a conversation piece in mental health care: a hypothesis and theory

The Diagnostic and Statistical Manual of Mental Disorders, abbreviated as the DSM, is one of mental health care's most commonly used classification systems. While the DSM has been successful in establishing a shared language for researching and communicating about mental distress, it has its limitations as an empirical compass. In the transformation of mental health care towards a system that is centered around shared decision-making, person-centered care, and personal recovery, the DSM is problematic as it promotes the disengagement of people with mental distress and is primarily a tool developed for professionals to communicate about patients instead of with patients. However, the mental health care system is set up in such a way that we cannot do without the DSM for the time being. In this paper, we aimed to describe the position and role the DSM may have in a mental health care system that is evolving from a medical paradigm to a more self-contained profession in which there is increased accommodation of other perspectives. First, our analysis highlights the DSM's potential as a boundary object in clinical practice, that could support a shared language between patients and professionals. Using the DSM as a conversation piece, a language accommodating diverse perspectives can be co-created. Second, we delve into why people with lived experience should be involved in co-designing spectra of distress. We propose an iterative design and test approach for designing DSM spectra of distress in co-creation with people with lived experience to prevent the development of 'average solutions' for 'ordinary people'. We conclude that transforming mental health care by reconsidering the DSM as a boundary object and conversation piece between activity systems could be a step in the right direction, shifting the power balance towards shared ownership in a participation era that fosters dialogue instead of diagnosis.

Making Sense of Spiritual, Metaphysical, and Eschatological Elements in Delusions: A Qualitative Study Using Interpretative Phenomenological Analysis

BACKGROUND

Spiritual, metaphysical, or eschatological elements in delusions (SMEDs) are frequent and often subjectively regarded as profound transformational experiences, similar to mystical experiences. This study aimed (1) to explore how SMEDs are experienced and in which aspects they are similar to mystical experiences and (2) to investigate how individuals make sense of SMED.

METHODS

Seven participants were interviewed, and their expressions were analyzed using interpretative phenomenological analysis.

RESULTS

We found that SMEDs were similar to mystical experiences with regard to alterations in perception of space, time, and unity. Furthermore, SMEDs were accompanied by a sense of enlightenment that however remained ineffable. SMEDs were interpreted from different viewpoints, i.e., as a source of ontological insight, as a mental health issue, as an inspiration for a new orientation in the world, and, for some participants, as an example of the limits of knowledge. Making sense of SMED appeared to follow a lively internal dialogue in which various, sometimes contradictory positions were reflected upon. Participants usually struggled to align the ostensible ontological significance of SMED to the dominating illness explanation.

CONCLUSION

SMEDs have similarities to mystical experiences, but integrating SMED into one's own life is challenging. We propose a philosophical, non-pathological interpretation of SMED derived from a novel perspective on mystical experience which may also have some therapeutic utility.

Delusions in postpartum psychosis: Implications for cognitive theories

Postpartum psychosis is a rare but serious condition that can affect women after childbirth. We present a case study of an individual with no comorbidities or psychiatric history who developed postpartum psychosis characterised by prominent misidentification delusions whilst admitted to hospital. The woman recovered quickly with medication and showed no evidence of relapse over the following three years. Whilst still symptomatic and after recovery, the patient was able to provide a detailed description of her experiences. Contemporaneous interviews and observations during her hospital admission and a subsequent detailed retrospective account provide a unique, comprehensive window into her experience of these time-limited delusions. Her case reveals important insights including the triggers for her misidentification delusions, the role of social and contextual influences on delusional beliefs, and her recall of active involvement in evaluating and discarding delusional hypotheses. These insights highlight the complexity of delusional beliefs, challenge existing theories of delusions, and help inform broader theories of belief formation.

The Nested States Model: A Phenomenologically-Grounded Model of the Mind

BACKGROUND

Subjective experience is central to the nature of mental illness, yet it has not played a central role in most empirical approaches to psychopathology. While phenomenological perspectives in psychiatry have seen a recent resurgence, there remains a need for more detailed models of psychopathological processes based on explicit phenomenological and enactive foundations.

SUMMARY

We present a framework derived from the Nested States Model (NSM) through which such phenomenologically-grounded models might be constructed. The NSM describes the dynamic structure of subjective experience as a system of nested states that reciprocally influence one another across hierarchical layers. Here, we show how the NSM provides a scheme for characterizing patterns of experience that comprise various psychopathological processes. We demonstrate the utility of this scheme both for clinical practice and for building our knowledge of psychopathological processes more broadly.

KEY MESSAGES

The NSM can advance three aims that we see as critical for the lasting integration of phenomenological approaches to psychopathology within psychiatry. First, we show that the NSM provides a means for constructing clinical formulations and treatment considerations that center squarely on an individual's subjective experiences. Second, the NSM supplies a framework for organizing findings from clinical-phenomenological research that can guide the construction of broader phenomenologically-grounded models of psychopathological processes. Lastly, the NSM aligns our perspective on subjective experience with emerging perspectives on brain dynamics, helping to bridge phenomenological work with ongoing neurophysiological research.

Critical Realism in Symptom Science - A Scoping Review

There has been an increasing interest in research positioned within critical realism (CR). This analysis aimed to determine how CR has been applied in symptom science through a scoping review of the literature. Fifty-two articles were identified through searches in seven databases and search engines, and grey literature. Quantitative and qualitative analyses were performed using Excel and ATLAS.ti 8.0. Review findings indicate that CR has been used to examine two key aspects of symptoms - symptom experiences and symptom interventions. The details of how CR was operationalized are presented. This first scoping review highlights how a critical realist lens would help examine individual and contextual factors that influence symptom experiences, response to interventions, and outcomes.

Self-Disorder in Schizophrenia: A Revised View (1. Comprehensive Review-Dualities of Self- and World-Experience)

A growing body of research supports the role of self-disorders as core phenotypic features of schizophrenia-spectrum disorders. Self-disorders comprise various alterations of conscious experience whose theoretical understanding continues to present a challenge. The following 2 articles aim to provide further clarification of the nature of self-disorders in schizophrenia by offering a comprehensive review (article 1) and theoretical revision (article 2) of the currently most influential model of altered selfhood in schizophrenia: the basic-self-disturbance or ipseity-disorder model (IDM). This article presents a state-of-the-art overview of the current self-disturbance model and critically assesses its descriptive adequacy with respect to the clinical variability and heterogeneity of the alterations in self- and world-awareness characteristic of schizophrenia. Special attention is paid to experiences of exaggerated basic self, increased "grip" or "hold" on the world, and paradoxical combinations. The next article proposes a theoretical revision of the self-disturbance model by considering how hyperreflexivity might form the crucial common thread or generating factor that unifies the phenomenologically heterogeneous, and sometimes even contradictory features of schizophrenic self-disorders. We outline the implications of our revised model for explanatory research, therapeutic practice, and our general understanding of the abnormalities in question.

Older people living in the community with delusion

AIM

This study explores the intricate relationship between social interactions and the development of persecutory delusions among older women living alone in Japan. Focusing on the unique perspective of individuals experiencing delusions outside clinical settings, the aim was to understand the impact of interpersonal interactions on delusion formation.

METHODS

Cases of older women living alone with persecutory delusions were selected from records of municipal psychogeriatric services and medical consultations within a community space. This study employed a descriptive approach to propose a hypothesis regarding the possible connection between social interactions and the development of persecutory delusions within this demographic.

RESULTS

Two relevant cases were identified, from which a three-step hypothesis emerged regarding the potential link between social interactions and the development of persecutory delusions in this demographic. Insights from these cases suggest that anxiety can trigger hallucinations, which, when unaddressed, evolve into delusional interpretations. Addressing these unmet needs could mitigate the progression of persecutory delusions.

CONCLUSIONS

The findings of this study underline the critical relationship between social interactions and persecutory delusions among older women living alone. The unmet need for empathy influences the progression from anxiety-driven hallucinations to fully formed delusions. Early intervention can prevent the escalation of delusions and involuntary psychiatric hospitalization. This study underscores the importance of recognizing the link between social isolation and delusion emergence. It advocates for compassionate environments to meet the psychological needs of older individuals grappling with delusions. Geriatr Gerontol Int 2024; 24: 118-122.

The Frequency of Design Studies Targeting People With Psychotic Symptoms and Features in Mental Health Care Innovation: Secondary Analysis of a Systematic Review

This study examined and reflected on the frequency of people with psychotic symptoms and features as the target population in design studies for mental health care innovation.

Exploring online and offline social experiences and interaction patterns of young adults with psychosis with the social media and internet social engagement questionnaire: Analyses and future directions

Objective

Social interactions and experiences are increasingly occurring online, including for young adults with psychosis. Healthy social interactions and experiences are widely recognized as a critical component of social recovery, yet research thus far has focused predominantly on offline interactions with limited understanding of these interactions online. We developed the Social Media and Internet sociaL Engagement (SMILE) questionnaire to assess the type, frequency, and nature of online social interactions and experiences among young adults with early psychosis to better assess online social activity and ultimately support personalized interventions.

Methods

Participants (N = 49) completed the SMILE questionnaire which asked about online platforms used, frequency of use, and if positive and negative experiences were more likely to happen online or offline. Participants completed additional self-report measures of victimization, positive psychotic symptoms, social functioning, and demographics. Exploratory factor analysis and correlations between identified factors and clinical measures of interest were completed.

Results

Exploratory factor analysis revealed three factors: positive engagement, victimization, and internalizing experiences. Most participants (6%-37%) experienced positive engagement offline. Victimization occurred equally online and offline (8%-27% and 4%-24%, respectively). Most participants (37%-51%) endorsed internalizing experiences as occurring equally offline and online, but approximately a third of participants reported internalizing experiences more frequently offline (20%-35%). Victimization was moderately (r = 0.34) correlated with overall online social experiences, suggesting more online time may increase the likelihood of victimization. Age was inversely related to the frequency of overall online social experiences.

Conclusion

Young adults with early psychosis experience positive and negative social experiences online and offline. New scales and measures to comprehensively assess the nature and function of online social interactions and experiences are needed.

Incels, autism, and hopelessness: affective incorporation of online interaction as a challenge for phenomenological psychopathology

Recent research has drawn attention to the prevalence of self-reported autism within online communities of involuntary celibates (incels). These studies suggest that some individuals with autism may be particularly vulnerable to the impact of incel forums and the hopelessness they generate. However, a more precise description of the experiential connection between inceldom, self-reported autism, and hopelessness has remained unarticulated. Therefore, this article combines empirical studies on the incel community with phenomenological and embodiment approaches to autism, hopelessness, and online affectivity. We analyze three interrelated aspects of online interactions in incel communities - worldview, bodily self-relation, and mutual dismissals - and examine how these elements contribute to the consolidation of the loss of significant life possibilities. By investigating the potential negative influence of specific online environments on affective dispositions, our approach contributes to the debate on current challenges to "situate" phenomenological psychopathology.

Overcoming the translational crisis of contemporary psychiatry - converging phenomenological and spatiotemporal psychopathology

Despite all neurobiological/neurocomputational progress in psychiatric research, recent authors speak about a 'crisis of contemporary psychiatry'. Some argue that we do not yet know the computational mechanisms underlying the psychopathological symptoms ('crisis of mechanism') while others diagnose a neglect of subjectivity, namely first-person experience ('crisis of subjectivity'). In this perspective, we propose that Phenomenological Psychopathology, due to its focus on first-person experience of space and time, is in an ideal position to address the crisis of subjectivity and, if extended to the brain's spatiotemporal topographic-dynamic structure as key focus of Spatiotemporal Psychopathology, the crisis of mechanism. We demonstrate how the first-person experiences of space and time differ between schizophrenia, mood disorders and anxiety disorders allowing for their differential-diagnosis - this addresses the crisis of subjectivity. Presupposing space and time as shared features of brain, experience, and symptoms as their "common currency", the structure of abnormal space and time experience may also serve as template for the structure of the brain's spatiotemporal neuro-computational mechanisms - this may address the crisis of mechanism. Preliminary scientific evidence in our examples of schizophrenia, bipolar disorder, anxiety disorder, and depression support such clinically relevant spatiotemporal determination of both first-person experience (crisis of subjectivity) and the brain's neuro-computational structure (crisis of mechanism). In conclusion, converging Phenomenological Psychopathology with Spatiotemporal Psychopathology might help to overcome the translational crisis in psychiatry by delineating more fine-grained neuro computational and -phenomenal mechanisms; this offers novel candidate biomarkers for diagnosis and therapy including both pharmacological and non-pharmacological treatment.

Delusions and the dilemmas of life: A systematic review and meta-analyses of the global literature on the prevalence of delusional themes in clinical groups

We investigated the prevalence of persecutory, grandiose, reference, control, and religious delusions in adult clinical populations worldwide and whether they differed according to country characteristics or age, gender, or year of publication. 123 studies met inclusion criteria, across 30 countries; 102 (115 samples, n = 20,979) were included in the main random-effects meta-analysis of studies measuring multiple delusional themes (21 in a separate analysis of studies in recording a single theme). Persecutory delusions were most common (pooled point estimate: 64.5%, CI = 60.6-68.3, k = 106, followed by reference (39.7%, CI 34.5-45.3, k = 65), grandiose (28.2, CI 24.8-31.9, k = 100), control 21.6%, CI 17.8-26.0, k = 53), and religious delusions 18.3%, CI 15.4-21.6, k = 50). Data from studies recording one theme were broadly consistent with these findings. There were no effects for study quality or publication date. Prevalences were higher in samples exclusively with psychotic patients but did not differ between developed and developing countries, or by country individualism, power distance, or prevalence of atheism. Religious and control delusions were more prevalent in countries with higher income inequality. We hypothesize that these delusional themes reflect universal human dilemmas and existential challenges.

The Role of Shame in Schizophrenia Delusion: The Interplay Between Cognitive-Perceptual and Emotional Traits

ABSTRACT

Through a strictly dimensional approach, the present study aimed at evaluating the interplay between cognitive-perceptual disturbances and emotional dispositions, particularly shame proneness, in schizophrenia delusion. One hundred one outpatients with schizophrenia were administered the Peters et al. Delusions Inventory, the Referential Thinking Scale (REF), the Magical Ideation Scale (MIS), the Perceptual Aberration Scale (PAS), the Positive and Negative Affect Schedule and the Experiences of Shame Scale (ESS). The severity of delusional ideation was positively related to all the cognitive-perceptual scales (REF, MIS, and PAS) and to shame proneness (ESS). Referential thinking (REF) emerged as the strongest predictor of delusion severity. The experience of shame played a mediation role in the relationship between cognitive-perceptual traits and delusional severity. These data suggest that severity delusion in schizophrenia depends, at least in part, on a complex interplay between cognitive-perceptual disturbances and experiences of shame.

Lived experience of psychosis: challenges and perspectives for research and care

PURPOSE OF REVIEW

There is currently a recognition of the first-personal knowledge of people with lived experience of schizophrenia as an epistemic privilege that can influence and improve the quality of research and care. This review aims to identify and better understand the actual challenges and perspectives of this field.

RECENT FINDINGS

Two main themes are present in the recent literature: first, the direct involvement of persons with lived experience of psychosis both in research (first person accounts, lived experience and participatory research) and care with the development of new professional positions such as expert patients and peer workers ; second, the field of research on lived experience of psychosis based mostly on phenomenological psychiatry and qualitative research.

SUMMARY

Both involvement of persons with lived experience in care and research, and research on lived experience of psychosis have direct impact and outcomes such as leading to a better understanding of psychotic phenomena and to reduced stigma and providing more person-centered and holistic care and better social support. This review also highlights the conceptual and ethical challenges to overcome, especially the risk of tokenism.

Delusions of love and passion in the behavioral variant of frontotemporal dementia

Erotomania (de Clérambault's syndrome) refers to the delusional belief that another person, usually socially unreachable, is in love with the holder of the delusion. The occurrence of erotomania in Frontotemporal Dementia has rarely been reported. We present the unique case of a 59-year-old woman with a strong family history of early-onset dementia in whom erotomania was the initial manifestation that led to a diagnosis of definite Behavioral Variant of Frontotemporal Dementia with a pathogenic missense mutation in the MAPT gene. Based on this case, we propose a hypothetical model for developing erotomania in patients with FTD.

How clinicians can support posttraumatic growth following psychosis: a perspective piece

Psychosis is often a traumatic experience that can lead to significant suffering. However, people may also experience posttraumatic growth following psychosis. Posttraumatic growth refers to the positive changes that people experience following a struggle with an adversarial event and has been shown to occur in at least five domains, including a greater appreciation for life; improved relationships with others; greater personal strengths; new life possibilities and spiritual/existential growth. Studies have shown that mental health services can play a key role in facilitating posttraumatic growth. However, there are no recommendations that clinicians can follow to best support posttraumatic growth following psychosis specifically. Without guidance, clinicians risk invalidating people's experiences of, or providing improper support for, posttraumatic growth. To address this knowledge gap, we reflect on current research and clinical guidelines to recommend ways that clinicians can support posttraumatic growth following psychosis.

Integrating Loss and Processing Grief in Psychotherapy of Psychosis

Objective: While recovery from psychosis is possible, recovery is a multidimensional construct driven by various factors. One relevant factor to recovery from psychosis that has often been overlooked in the psychotherapy literature is the importance of facing loss and processing grief in relation to psychosis. Methods: A review of the existing empirical literature on grief associated with psychosis was conducted. Clinicians with significant therapeutic experience working with persons with psychosis reviewed cases to examine the losses the patients had suffered and how they responded to these losses. The clinicians considered essential principles that are relevant when helping patients with psychosis integrate loss and process grief. Results: Persons who have experienced psychosis often experience the loss of role functioning, interpersonal relationships, cognition, and self-concept. However, when these losses are not fully integrated into the person's identity, it can result in either more losses due to denial and metacognitive impairments or increased hopelessness and depression due to internalized stigma. Five elements in psychotherapy of psychosis were identified that can facilitate the integration of loss and processing of grief: understand the personal experience of the psychotic episode, attend to feelings of grief and the primary loss, explore the meaning of psychotic symptoms and identity implications, integrate psychotic vulnerabilities into the sense of self, and foster realistic hope in the face of an uncertain future. Conclusion: Psychotherapy can enable persons with psychosis to make meaning of their losses, process their grief, integrate their psychotic vulnerability into their sense of self, and develop realistic hope.

Phenomenology as a resource for translational research in mental health: methodological trends, challenges and new directions

This editorial reflects on current methodological trends in translational research in mental health. It aims to build a bridge between two fields that are frequently siloed off from each other: interventional research and phenomenologically informed research. Recent years have witnessed a revival of phenomenological approaches in mental health, often - but not only - as a means of connecting the subjective character of experience with neurobiological explanatory accounts of illness. Rich phenomenological knowledge accrued in schizophrenia, and wider psychosis research, has opened up new opportunities for improving prediction, early detection, diagnosis, prognostic stratification, treatment and ethics of care. Novel qualitative studies of delusions and hallucinations have challenged longstanding assumptions about their nature and meaning, uncovering highly complex subjective dimensions that are not adequately captured by quantitative methodologies. Interdisciplinary and participatory research efforts, informed by phenomenological insights, have prompted revisions of pre-established narratives of mental disorder dominated by a dysfunction framework and by researcher-centric outcome measures. Despite these recent advances, there has been relatively little effort to integrate and translate phenomenological insights across applied clinical research, with the goal of producing more meaningful, patient-valued results. It is our contention that phenomenological psychopathology - as the basic science of psychiatry - represents an important methodology for advancing evidence-based practices in mental health, and ultimately improving real-world outcomes. Setting this project into motion requires a greater emphasis on subjectivity and the structures of experience, more attention to the quality and patient-centredness of outcome measures, and the identification of treatment targets that matter most to patients.

"The more things change…"? Stability of delusional themes across 12 years of presentations to an early intervention service for psychosis

PURPOSE

While the prevalence of delusional themes appears to be consistent across geographic contexts, little is known about the relative prevalence of such themes within a given setting over periods of time. We therefore investigated delusional themes across 12 years of presentation to a catchment-based early intervention service for first episode psychosis (FEP).

METHODS

Systematically collected data from 500 patients at an early intervention service for FEP were analyzed. Four cohorts of 3 years each, from 2006 to 2017, were used to compare the frequency of delusion themes across cohorts. We also integrated into the analysis baseline sociodemographic factors such as gender, age, and highest level of education and clinical factors such as anxiety, depression, suicidality, hallucinations, and primary diagnosis (affective or non-affective psychosis).

RESULTS

Sex and education level were stable across cohorts, while patient age varied (p = 0.047). Clinical anxiety, depression, and suicidality at entry were also stable. Across cohorts, the proportion of patients with affective versus non-affective diagnosis differed (p = 0.050), with no differences in global rating of delusion severity or theme prevalence except for delusions of guilt or sin (p = 0.001). This single theme difference was not correlated with age or diagnosis.

CONCLUSION

Our study suggests relatively stable prevalence of delusion themes across cohorts of individuals experiencing FEP. This demonstrates the potential utility of studying thematic content both for understanding delusions in clinical populations and in research. Future explorations of the relationships between delusion themes and across individual patient episodes should be conducted.

Taking subjectivity seriously: towards a unification of phenomenology, psychiatry, and neuroscience

Nearly all psychiatric diseases involve alterations in subjective, lived experience. The scientific study of the biological basis of mental illness has generally focused on objective measures and observable behaviors, limiting the potential for our understanding of brain mechanisms of disease states and possible treatments. However, applying methods designed principally to interpret objective behavioral measures to the measurement and extrapolation of subjective states presents a number of challenges. In order to help bridge this gap, we draw on the tradition of phenomenology, a philosophical movement concerned with elucidating the structure of lived experience, which emerged in the early 20th century and influenced philosophy of mind, cognitive science, and psychiatry. A number of early phenomenologically-oriented psychiatrists made influential contributions to the field, but this approach retreated to the background as psychiatry moved towards more operationalized disease classifications. Recently, clinical-phenomenological research and viewpoints have re-emerged in the field. We argue that the potential for phenomenological research and methods to generate productive hypotheses about the neurobiological basis of psychiatric diseases has thus far been underappreciated. Using specific examples drawing on the subjective experience of mania and psychosis, we demonstrate that phenomenologically-oriented clinical studies can generate novel and fruitful propositions for neuroscientific investigation. Additionally, we outline a proposal for more rigorously integrating phenomenological investigations of subjective experience with the methods of modern neuroscience research, advocating a cross-species approach with a key role for human subjects research. Collaborative interaction between phenomenology, psychiatry, and neuroscience has the potential to move these fields towards a unified understanding of the biological basis of mental illness.

The meaning in grandiose delusions: measure development and cohort studies in clinical psychosis and non-clinical general population groups in the UK and Ireland

BACKGROUND

The content of grandiose delusions-inaccurate beliefs that one has special powers, wealth, mission, or identity-is likely to be highly meaningful. The meaning, for example providing a sense of purpose, could prove to be a key factor in the delusion taking hold. We aimed to empirically define and develop measures of the experience of meaning in grandiose delusions and the sources of this meaning, and to test whether severity of grandiosity in clinical and non-clinical populations is associated with level of meaning.

METHODS

We did a cross-sectional self-report questionnaire study in two cohorts: non-clinical participants aged 18 years and older, with UK or Irish nationality or residence; and patients with affective or non-affective psychosis diagnoses, aged 16 years and older, and accessing secondary care mental health services in 39 National Health Service providers in England and Wales. Participants with high grandiosity completed two large item pools: one assessing the experience of meaning in grandiose delusions (Grandiosity Meaning Measure [termed gram]) and one assessing the sources of meaning (Grandiosity Meaning Measure-Sources [termed grams]). The Grandiosity Meaning Measure and Grandiosity Meaning Measure-Sources were developed using exploratory factor analysis and confirmatory factor analysis. Structural equation modelling was used to test the associations of meaning with the severity of grandiosity. The primary outcome measure for grandiosity was the Specific Psychotic Experiences Questionnaire (grandiosity subscale) and associations were tested with the Grandiosity Meaning Measure and the Grandiosity Meaning Measure-Sources.

FINDINGS

From Aug 30, 2019, to Nov 21, 2020, 13 323 non-clinical participants were enrolled. 2821 (21%) were men and 10 134 (76%) were women, 11 974 (90%) were White, and the mean age was 39·5 years (SD 18·6 [range 18-93]). From March 22, 2021, to March 3, 2022, 798 patients with psychosis were enrolled. 475 (60%) were men and 313 (39%) were women, 614 (77%) were White, and the mean age was 43·4 years (SD 13·8 [range 16-81]). The experience of meaning in relation to grandiose delusions had three components: coherence, purpose, and significance. The sources of meaning had seven components: positive social perceptions, spirituality, overcoming adversity, confidence in self among others, greater good, supporting loved ones, and happiness. The measurement of meaning was invariant across clinical and non-clinical populations. In the clinical population, each person typically endorsed multiple meanings and sources of meaning for the grandiose delusion. Meaning in grandiose delusions was strongly associated with severity of grandiosity, explaining 53·5% of variance, and with grandiose delusion conviction explaining 27·4% of variance. Grandiosity was especially associated with sense of purpose, and grandiose delusion conviction with coherence. Similar findings were found for the non-clinical population.

INTERPRETATION

Meaning is inherently tied to grandiose delusions. This study provides a framework for research and clinical practice to understand the different types of meaning of grandiosity. The framework is likely to have clinical use in psychological therapy to help guide patients to find sources of equivalent meaning from other areas of their lives and thereby reduce the extent to which the grandiose delusion is needed.

FUNDING

Health Education England and National Institute for Health and Care Research.

'An experience of meaning': A 20-year prospective analysis of delusional realities in schizophrenia and affective psychoses

Delusions are transdiagnostic and heterogeneous phenomena with varying degrees of intensity, stability, and dimensional attributes where the boundaries between everyday beliefs and delusional beliefs can be experienced as clearly demarcated, fuzzy, or indistinguishable. This highlights the difficulty in defining delusional realities. All individuals in the current study were evaluated at index and at least one of six subsequential follow-ups over 20 years in the Chicago Longitudinal Study. We assessed 16 distinct delusions categorized as thought or thematic delusions. We also examined the probability of recurrence and the relationships between delusions and hallucinations, depression, anxiety, and negative symptoms. The sample consisted of 262 individuals with schizophrenia vs. affective psychosis. Thought delusions were significantly different between groups at all follow-up evaluations except the 20-year timepoint. Thematic delusions were more common than thought delusions and show a significant decreasing pattern. In general, delusional content varied over time. Referential, persecutory, and thought dissemination delusions show the highest probability of recurrence. Hallucinations were the strongest indicator for thought, thematic, and overall delusions. The formation and maintenance of delusions were conceptualized as a multimodal construct consisting of sensory, perceptual, emotional, social, and somatic embodiment of an "experience of meanings". Given the significant associations between delusions and hallucinations, future work incorporating participatory research is needed to better define and align subjective and objective perspectives. Our research also points to the need for future clinical interventions that specifically evaluate and target the coexistence and entanglement of delusions and hallucinations.