Maturation-dependent vulnerability of emotion regulation as a response to COVID-19 related stress in adolescents

The influence of relative pubertal maturity on executive function development in adolescent girls

A positive association between pubertal maturity as assessed by skeletal development, and specific cognitive abilities has recently been demonstrated in a cohort of adolescent girls. The current study explores the impact of chronological age and relative pubertal maturity on executive function within the same cohort. Relative maturity, determined by the difference between chronological age and skeletal age, establishes the criteria for enrolling participants into average, advanced, or delayed relative maturity subgroups. Performance is assessed using the Numerical Stroop test and analyzed across four conditions, each with varying task requirements related to inhibition and task switching. The effects of chronological age and relative maturity on executive functions are tested by a linear mixed model. Within the examined age-range (12-15 y), a more protracted development was found for inhibition as compared to switching. In line with the previous findings, the results reveal significant development in executive performance as a function of chronological age, and relative maturity also demonstrated significant effect on the development of executing functioning. The significant interaction effect between Chronological Age and Relative Maturity suggests that the degree of interplay between these factors varies across the examined age range. Specifically, relative maturity may have a more noticeable impact on EF functioning in middle adolescence compared to early adolescence.

Navigating Pubertal Goldilocks: The Optimal Pace for Hierarchical Brain Organization

Adolescence is a timed process with an onset, tempo, and duration. Nevertheless, the temporal dimension, especially the pace of maturation, remains an insufficiently studied aspect of developmental progression. The primary objective is to estimate the precise influence of pubertal maturational tempo on the configuration of associative brain regions. To this end, the connection between maturational stages and the level of hierarchical organization of large-scale brain networks in 12-13-year-old females is analyzed. Skeletal maturity is used as a proxy for pubertal progress. The degree of maturity is defined by the difference between bone age and chronological age. To assess the level of hierarchical organization in the brain, the temporal dynamic of closed eye resting state high-density electroencephalography (EEG) in the alpha frequency range is analyzed. Different levels of hierarchical order are captured by the measured asymmetry in the directionality of information flow between different regions. The calculated EEG-based entropy production of participant groups is then compared with accelerated, average, and decelerated maturity. Results indicate that an average maturational trajectory optimally aligns with cerebral hierarchical order, and both accelerated and decelerated timelines result in diminished cortical organization. This suggests that a "Goldilocks rule" of brain development is favoring a particular maturational tempo.

Normative reference interval for youths on the Difficulties in Emotion Regulation Scale (DERS)

Background

The Difficulties in Emotion Regulation Scale (DERS) is widely used in both clinical and non-clinical research to assess emotional regulation difficulties. To guide interpretation of scores, establishing thresholds for normative DERS scores is informative. However, despite its widespread use, to date no study has provided such threshold for youths. This literature review aimed to fill this gap by examining the 90% reference interval for the DERS in youths aged 11-19 years.

Methods

We conducted a systematic search on PubMed (MEDLINE) on 12 March 2024, to identify studies reporting DERS-36 total scores (DERS-T) in youths aged 11-19 years from either community-based populations or healthy volunteers.

Results

A total of 34 studies were included; 20 studies included community-based participants (n = 6,960), while the remaining 14 studies included healthy volunteers (n = 766), resulting in a total of 7,726 participants. The 90% reference interval for DERS-T from all included participants had a threshold of 121.8 normative emotion regulation in youths.

Conclusion and significance

This threshold is considerably higher than DERS-T scores reported in most clinical studies and a substantial variation in reference intervals across studies is observed. We identify five main methodological factors related to the DERS-36 and discuss their potential impact on the validity, reliability, and generalizability of findings. Given the DERS-T range of 36-180, we conclude that the 90% reference interval derived from our review is not sufficiently robust to guide clinical or scientific interpretations. Our work is not exhaustive, and further research is needed to validate and test the reliability of this reference interval.