1
|
Korte KJ, Jaguga F, Kim HH, Stroud RE, Stevenson A, Akena D, Atwoli L, Gichuru S, James R, Kwobah E, Kariuki SM, Kyebuzibwa J, Mwema RM, Newton CRJC, Zingela Z, Stein DJ, Alemayehu M, Teferra S, Koenen KC, Gelaye B. Psychometric properties of the mini international neuropsychiatric interview (MINI) psychosis module: a Sub-Saharan Africa cross country comparison. Psychol Med 2023; 53:7042-7052. [PMID: 36896802 PMCID: PMC10492890 DOI: 10.1017/s0033291723000296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
BACKGROUND The Mini International Neuropsychiatric Inventory 7.0.2 (MINI-7) is a widely used tool and known to have sound psychometric properties; but very little is known about its use in low and middle-income countries (LMICs). This study aimed to examine the psychometric properties of the MINI-7 psychosis items in a sample of 8609 participants across four countries in Sub-Saharan Africa. METHODS We examined the latent factor structure and the item difficulty of the MINI-7 psychosis items in the full sample and across four countries. RESULTS Multiple group confirmatory factor analyses (CFAs) revealed an adequate fitting unidimensional model for the full sample; however, single group CFAs at the country level revealed that the underlying latent structure of psychosis was not invariant. Specifically, although the unidimensional structure was an adequate model fit for Ethiopia, Kenya, and South Africa, it was a poor fit for Uganda. Instead, a 2-factor latent structure of the MINI-7 psychosis items provided the optimal fit for Uganda. Examination of item difficulties revealed that MINI-7 item K7, measuring visual hallucinations, had the lowest difficulty across the four countries. In contrast, the items with the highest difficulty were different across the four countries, suggesting that MINI-7 items that are the most predictive of being high on the latent factor of psychosis are different for each country. CONCLUSIONS The present study is the first to provide evidence that the factor structure and item functioning of the MINI-7 psychosis vary across different settings and populations in Africa.
Collapse
Affiliation(s)
- Kristina J Korte
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Florence Jaguga
- Department of Mental Health, Moi Teaching and Referral Hospital, Eldoret, Kenya
| | - Hannah H Kim
- Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Rocky E Stroud
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Anne Stevenson
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Dickens Akena
- Department of Psychiatry, School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Lukoye Atwoli
- Department of Mental Health, School of Medicine, Moi University College of Health Sciences, Eldoret, Kenya
| | - Stella Gichuru
- Department of Mental Health, Moi Teaching and Referral Hospital, Eldoret, Kenya
| | - Roxanne James
- SAMRC Unit on Risk & Resilience in Mental Disorders, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
| | - Edith Kwobah
- Department of Mental Health, School of Medicine, Moi University College of Health Sciences, Eldoret, Kenya
| | - Symon M Kariuki
- Neurosciences Unit, Clinical Department, KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Joseph Kyebuzibwa
- Department of Psychiatry, School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Rehema M Mwema
- Neurosciences Unit, Clinical Department, KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Charles R J C Newton
- Neurosciences Unit, Clinical Department, KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya
| | - Zukiswa Zingela
- Psychiatry and Behavioural Sciences, Walter Sisulu University and Nelson Mandela Academic Hospital, Port Elizabeth, South Africa
| | - Dan J Stein
- SAMRC Unit on Risk & Resilience in Mental Disorders, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
| | - Melkam Alemayehu
- Department of Psychiatry, Addis Ababa University, Addis Ababa, Ethiopia
| | - Solomon Teferra
- Department of Psychiatry, Addis Ababa University, Addis Ababa, Ethiopia
| | - Karestan C Koenen
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Bizu Gelaye
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| |
Collapse
|
2
|
Pfarr JK, Meller T, Evermann U, Sahakyan L, Kwapil TR, Nenadić I. Trait schizotypy and the psychosis prodrome: Current standard assessment of extended psychosis spectrum phenotypes. Schizophr Res 2023; 254:208-217. [PMID: 36933416 DOI: 10.1016/j.schres.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 01/10/2023] [Accepted: 03/03/2023] [Indexed: 03/20/2023]
Abstract
Schizotypy has become an increasingly important construct for elaborating psychotic disorders that vary along the schizophrenic spectrum. However, different schizotypy inventories vary in conceptual approach and measurement. In addition, commonly used schizotypy scales have been seen as qualitatively different from screening instruments for prodromal schizophrenia like the Prodromal Questionnaire-16 (PQ-16). Our study investigated the psychometric properties of three schizotypy questionnaires (the Schizotypal Personality Questionnaire-Brief, Oxford-Liverpool Inventory of Feelings and Experiences, and the Multidimensional Schizotypy Scale) as well as the PQ-16 in a cohort of 383 non-clinical subjects. We initially evaluated their factor structure using Principal Component Analysis (PCA) and used Confirmatory Factor Analysis (CFA) to test a newly proposed composition of factors. PCA results support a three-factor structure of schizotypy that accounts for 71 % of the total variance, but also shows cross-loadings of some schizotypy subscales. CFA of the newly composed schizotypy factors (together with an added neuroticism factor) shows good fit. Analyses including the PQ-16 indicate considerable overlap with measures of trait schizotypy, suggesting that the PQ-16 might not be quantitatively or qualitatively different from schizotypy measurements. Taken together, results indicate that there is good support for a three-factor structure of schizotypy but also that different schizotypy measurements grasp facets of schizotypy differently. This points towards the need for an integrative approach for assessing the construct of schizotypy.
Collapse
Affiliation(s)
- Julia-Katharina Pfarr
- Department of Psychiatry and Psychotherapy, University of Marburg, Germany; Center for Mind, Brain and Behavior, University of Marburg, Germany.
| | - Tina Meller
- Department of Psychiatry and Psychotherapy, University of Marburg, Germany; Center for Mind, Brain and Behavior, University of Marburg, Germany
| | - Ulrika Evermann
- Department of Psychiatry and Psychotherapy, University of Marburg, Germany; Center for Mind, Brain and Behavior, University of Marburg, Germany
| | - Lili Sahakyan
- Department of Psychology, University of Illinois at Urbana-Champaign, United States of America; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, United States of America
| | - Thomas R Kwapil
- Department of Psychology, University of Illinois at Urbana-Champaign, United States of America; Department of Psychology, University of North Carolina at Greensboro, United States of America
| | - Igor Nenadić
- Department of Psychiatry and Psychotherapy, University of Marburg, Germany; Center for Mind, Brain and Behavior, University of Marburg, Germany
| |
Collapse
|
3
|
Gerhart J, Russ EU, Alonzi S, Hoerger M. Shame in Response to Affective Expression and Its Relation to Social Anhedonia and Schizotypy Traits. J Nerv Ment Dis 2022; 210:54-60. [PMID: 34982751 DOI: 10.1097/nmd.0000000000001412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Schizotypy is marked by negative symptoms including blunted affect, social isolation, and social anhedonia. Contemporary personality theory suggests that maladaptive shame regulation may disrupt interpersonal function across personality disorders. We hypothesized that "affect shame"-a conditioned response of shame evoked by openly expressing emotions would co-occur with interpersonal deficits in schizotypy. As hypothesized, affect shame was associated with interpersonal deficits (r = 0.17, p < 0.001), physical anhedonia (r = 0.13, p = 0.001), and social anhedonia (r = 0.17, p = 0.001). The observed findings were upheld in analyses controlling for demographic characteristics, depression symptom severity, and neuroticism and were maintained consistently across sensitivity analyses. Findings suggest that shame related to emotional expression is related to interpersonal deficits in schizotypy and have implications for our understanding of the etiology and treatment of this disorder.
Collapse
Affiliation(s)
- James Gerhart
- Department of Psychology, Central Michigan University, Mount Pleasant, Michigan
| | - Eric U Russ
- Department of Psychiatry, University of Louisville, Louisville, Kentucky
| | - Sarah Alonzi
- Department of Psychology, Tulane University, New Orleans, Louisiana
| | - Michael Hoerger
- Department of Psychology, Tulane University, New Orleans, Louisiana
| |
Collapse
|
4
|
Wu Q, He J, Fang S, Zhang P, Luo X, Zhang J, Xiong Y, Luo F, Wang X, Yao S, Wang X. A novel construct of anhedonia revealed in a Chinese sample via the Revised Physical and Social Anhedonia Scales. BMC Psychiatry 2020; 20:529. [PMID: 33167901 PMCID: PMC7650163 DOI: 10.1186/s12888-020-02900-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 09/28/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Anhedonia is a core clinical symptom of mental disorders. The Revised Physical Anhedonia Scale (RPAS) and the Revised Social Anhedonia Scale (RSAS) have been applied in clinical and non-clinical samples since 1980s. However, the construct of a unified RPAS&RSAS for comprehensive measurement of anhedonia has never been explored. Therefore, the purpose of our study was to examine the factor structure of the unified RPAS&RSAS among undergraduates and clinical patients. METHODS A total of 3435 undergraduates from two universities and 294 clinical patients with mental disorders had completed the Chinese version of the RPAS and the RSAS. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were each conducted to reveal the constructs of the RPAS and the RSAS. CFA was used to evaluate first- and second-order models for the unified RPAS&RSAS in undergraduates and clinical patients. The internal consistency and test-retest reliability of the RPAS and the RSAS were also evaluated. RESULTS EFA and CFA indicated 2-factor structures for RPAS and RSAS, with the factors being defined as anticipatory anhedonia and consummatory anhedonia. The second-order model of the unified RPAS&RSAS in the undergraduates and clinical patients both had satisfactory fit index values (Undergraduate sample: CFI = 0.901, TLI = 0.899, RMSEA = 0.055, SRMR = 0.086; Clinical sample: CFI = 0.922, TLI = 0.911, RMSEA = 0.052, SRMR = 0.078). The psychometric robustness of the RPAS&RSAS were confirmed by high internal consistency and test-retest reliability values. CONCLUSIONS The unified RPAS&RSAS with a second-order structure was confirmed in both undergraduates and clinical samples in Chinese. The construct of anhedonia was refreshed as covering physical and social domains, and each of them includes both anticipatory and consummatory components.
Collapse
Affiliation(s)
- Qiongqiong Wu
- grid.216417.70000 0001 0379 7164Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011 China
| | - Jiayue He
- grid.216417.70000 0001 0379 7164Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011 China
| | - Shulin Fang
- grid.216417.70000 0001 0379 7164Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011 China
| | - Panwen Zhang
- grid.216417.70000 0001 0379 7164Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011 China
| | - Xingwei Luo
- grid.216417.70000 0001 0379 7164Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011 China
| | - Jianghua Zhang
- grid.216417.70000 0001 0379 7164Student Affairs Department, Central South University, Changsha, 410083 China
| | - Yan Xiong
- grid.216417.70000 0001 0379 7164Student Affairs Department, Central South University, Changsha, 410083 China
| | - Fusheng Luo
- grid.440660.00000 0004 1761 0083Student Affairs Department, Central South University of Forestry and Technology, Changsha, 410004 China
| | - Xiaosheng Wang
- grid.216417.70000 0001 0379 7164Department of Human Anatomy and Neurobiology, Xiangya School of Medicine, Central South University, Changsha, 410013 China
| | - Shuqiao Yao
- grid.216417.70000 0001 0379 7164Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011 China ,grid.216417.70000 0001 0379 7164Medical Psychological Institute of Central South University, Changsha, 410011 China ,National Clinical Research Center for Mental Disorders, Changsha, 410011 China
| | - Xiang Wang
- Medical Psychological Center, the Second Xiangya Hospital, Central South University, Changsha, 410011, China. .,Medical Psychological Institute of Central South University, Changsha, 410011, China. .,National Clinical Research Center for Mental Disorders, Changsha, 410011, China.
| |
Collapse
|
5
|
Flückiger R, Michel C, Grant P, Ruhrmann S, Vogeley K, Hubl D, Schimmelmann BG, Klosterkötter J, Schmidt SJ, Schultze-Lutter F. The interrelationship between schizotypy, clinical high risk for psychosis and related symptoms: Cognitive disturbances matter. Schizophr Res 2019; 210:188-196. [PMID: 30683524 DOI: 10.1016/j.schres.2018.12.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 12/13/2018] [Accepted: 12/20/2018] [Indexed: 02/07/2023]
Abstract
Schizotypy and clinical high risk (CHR) criteria can identify individuals who are at increased risk for developing psychosis in community and patient samples. However, both approaches have rarely been combined, and very little is known about their associations. Therefore, we examined the factorial structure of CHR and related symptoms and schizotypy features as well as their interrelationship for the first time in a comprehensive approach. In a sample of 277 patients (22 ± 6 years) from two early detection services, structural equation modeling including confirmatory factor analysis was performed to test a theory-driven model using four Wisconsin Schizotypy Scales, 14 predictive basic symptoms (BS) of the Schizophrenia Proneness Instrument, and positive, negative, and disorganized symptoms from the Structured Interview for Psychosis-Risk Syndromes. The data fitted well to the six hypothesized latent factors consisting of negative schizotypy, positive schizotypy including perceptual BS, negative symptoms, positive symptoms, disorganized symptoms and cognitive disturbances. As postulated, schizotypy features were significantly associated with positive, negative and disorganized symptoms through cognitive disturbances. Additionally, positive and negative schizotypy also had a direct association with the respective symptom-domain. While the identified factorial structure corresponds well to dimensional models of schizotypy and psychoses, our model extends earlier models by indicating that schizotypy features are associated with positive, negative and disorganized symptoms directly or indirectly via subjective cognitive disturbances. This calls for more attention to subjective cognitive deficits in combination with heightened schizotypy in the early detection and intervention of psychoses - or even of an Attenuated Psychosis Syndrome.
Collapse
Affiliation(s)
- Rahel Flückiger
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bolligenstrasse 111, 3000 Bern 60, Switzerland.
| | - Chantal Michel
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bolligenstrasse 111, 3000 Bern 60, Switzerland.
| | - Phillip Grant
- Psychology School, Faculty of Health and Social Sciences, Fresenius University of Applied Sciences, Marienburgstr. 6, 60528 Frankfurt am Main, Germany; Faculty of Life Science Engineering, Technische Hochschule Mittelhessen University of Applied Sciences, Wiesenstr. 14, 35390 Gießen, Germany.
| | - Stephan Ruhrmann
- Department of Psychiatry and Psychotherapy, University of Cologne, Kerpener Straße 62, 50937 Köln, Germany.
| | - Kai Vogeley
- Department of Psychiatry and Psychotherapy, University of Cologne, Kerpener Straße 62, 50937 Köln, Germany.
| | - Daniela Hubl
- University Hospital of Psychiatry and Psychotherapy, University of Bern, Bolligenstrasse 111, 3000 Bern 60, Switzerland.
| | - Benno G Schimmelmann
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bolligenstrasse 111, 3000 Bern 60, Switzerland; University Hospital of Child and Adolescent Psychiatry, University Hospital Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany.
| | - Joachim Klosterkötter
- Department of Psychiatry and Psychotherapy, University of Cologne, Kerpener Straße 62, 50937 Köln, Germany.
| | - Stefanie J Schmidt
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bolligenstrasse 111, 3000 Bern 60, Switzerland; Department of Clinical Psychology and Psychotherapy, University of Bern, Fabrikstrasse 8, 3012 Bern, Switzerland.
| | - Frauke Schultze-Lutter
- University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bolligenstrasse 111, 3000 Bern 60, Switzerland; Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich-Heine University, Bergische Landstraße 2, 40629 Dusseldorf, Germany.
| |
Collapse
|
6
|
Barkus E, Badcock JC. A Transdiagnostic Perspective on Social Anhedonia. Front Psychiatry 2019; 10:216. [PMID: 31105596 PMCID: PMC6491888 DOI: 10.3389/fpsyt.2019.00216] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 03/25/2019] [Indexed: 12/28/2022] Open
Abstract
Humans are highly social beings, yet people with social anhedonia experience reduced interest in or reward from social situations. Social anhedonia is a key facet of schizotypal personality, an important symptom of schizophrenia, and increasingly recognized as an important feature in a range of other psychological disorders. However, to date, there has been little examination of the similarities and differences in social anhedonia across diagnostic borders. Here, our goal was to conduct a selective review of social anhedonia in different psychological and life course contexts, including the psychosis continuum, depressive disorder, posttraumatic stress disorder, eating disorders, and autism spectrum disorders, along with developmental and neurobiological factors. Current evidence suggests that the nature and expression of social anhedonia vary across psychological disorders with some groups showing deficient learning about, enjoyment from, and anticipation of the pleasurable aspects of social interactions, while for others, some of these components appear to remain intact. However, study designs and methodologies are diverse, the roles of developmental and neurobiological factors are not routinely considered, and direct comparisons between diagnostic groups are rare-which prevents a more nuanced understanding of the underlying mechanisms involved. Future studies, parsing the wanting, liking, and learning components of social reward, will help to fill gaps in the current knowledge base. Consistent across disorders is diminished pleasure from social situations, subsequent withdrawal, and poorer social functioning in those who express social anhedonia. Nonetheless, feelings of loneliness often remain, which suggests the need for social connection is not entirely absent. Adolescence is a particularly important period of social and neural development and may provide a valuable window on the developmental origins of social anhedonia. Adaptive social functioning is key to recovery from mental health disorders; therefore, understanding the intricacies of social anhedonia will help to inform treatment and prevention strategies for a range of diagnostic categories.
Collapse
Affiliation(s)
- Emma Barkus
- Cognitive Basis of Atypical Behaviour Initiative (CBABi), School of Psychology, University of Wollongong, Wollongong, NSW, Australia
| | - Johanna C. Badcock
- Centre for Clinical Research in Neuropsychiatry (CCRN), Division of Psychiatry, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, WA, Australia
| |
Collapse
|
7
|
Schizophrenia spectrum personality disorders in psychometrically identified schizotypes at two-year follow-up. Psychiatry Res 2017; 252:289-295. [PMID: 28288440 DOI: 10.1016/j.psychres.2017.03.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 12/05/2016] [Accepted: 03/06/2017] [Indexed: 11/21/2022]
Abstract
Earlier (Bolinskey et al., 2015), we reported that psychometrically identified schizotypes displayed greater symptom levels and higher incidences of schizophrenia spectrum (schizotypal, schizoid, paranoid, and avoidant) personality disorders (PDs). In this study, 49 schizotypes and 39 matched controls participated in follow-up assessments after two years. Participants were previously identified as schizotypes or controls based on scores on the Chapman Psychosis Proneness Scales (CPPS), and were interviewed at baseline and follow-up with the Personality Disorder Interview for DSM-IV (PDI-IV). At follow-up, schizotypes displayed significantly higher symptom levels compared to controls, with medium to large effects, and appeared to meet criteria for diagnosis of each PD more often than controls, although significant differences were only observed for paranoid PD. Overall, schizotypes were more likely to have met criteria for a diagnosis at either baseline or follow-up. Finally, we observed a widening disparity over time between schizotypes and controls in avoidant and schizoid PDs. These results suggest that schizophrenia spectrum PDs, as well as subthreshold symptoms of these disorders, can represent a greater liability for schizophrenia in individuals identified as at-risk on the basis of psychometric means only. Furthermore, these findings demonstrate that such differences persist, and in some cases increase, over time.
Collapse
|
8
|
Kane MJ, Meier ME, Smeekens BA, Gross GM, Chun CA, Silvia PJ, Kwapil TR. Individual differences in the executive control of attention, memory, and thought, and their associations with schizotypy. J Exp Psychol Gen 2016; 145:1017-1048. [PMID: 27454042 PMCID: PMC4965188 DOI: 10.1037/xge0000184] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A large correlational study took a latent-variable approach to the generality of executive control by testing the individual-differences structure of executive-attention capabilities and assessing their prediction of schizotypy, a multidimensional construct (with negative, positive, disorganized, and paranoid factors) conveying risk for schizophrenia. Although schizophrenia is convincingly linked to executive deficits, the schizotypy literature is equivocal. Subjects completed tasks of working memory capacity (WMC), attention restraint (inhibiting prepotent responses), and attention constraint (focusing visual attention amid distractors), the latter 2 in an effort to fractionate the "inhibition" construct. We also assessed mind-wandering propensity (via in-task thought probes) and coefficient of variation in response times (RT CoV) from several tasks as more novel indices of executive attention. WMC, attention restraint, attention constraint, mind wandering, and RT CoV were correlated but separable constructs, indicating some distinctions among "attention control" abilities; WMC correlated more strongly with attentional restraint than constraint, and mind wandering correlated more strongly with attentional restraint, attentional constraint, and RT CoV than with WMC. Across structural models, no executive construct predicted negative schizotypy and only mind wandering and RT CoV consistently (but modestly) predicted positive, disorganized, and paranoid schizotypy; stalwart executive constructs in the schizophrenia literature-WMC and attention restraint-showed little to no predictive power, beyond restraint's prediction of paranoia. Either executive deficits are consequences rather than risk factors for schizophrenia, or executive failures barely precede or precipitate diagnosable schizophrenia symptoms. (PsycINFO Database Record
Collapse
Affiliation(s)
| | - Matt E Meier
- Department of Psychology, Western Carolina University
| | | | | | | | | | | |
Collapse
|