Investigating the dissociative subtype of post-traumatic stress disorder in single- and multi-event trauma-exposed youth: Prevalence, course, prognosis, severity and functional impairment.

OBJECTIVES: This study aimed, following both single- and multi-event trauma, to ascertain prevalence and course of the dissociative subtype of post-traumatic stress disorder (PTSD-DS) in youth; how well early PTSD-DS predicts later PTSD; and whether dissociation accounts for unique variance in post-traumatic stress symptoms (PTSS) and functional impairment over and above the effect of other post-trauma cognitive processing factors and PTSS respectively. DESIGN AND METHODS: This study is a secondary analysis of data from the Acute Stress Programme for Children and Teenagers study (n = 234) and the Coping in Care After Trauma study (n = 110) in which children had experienced single- and multi-event trauma respectively. RESULTS: PTSD-DS diagnosis was common in children with PTSD regardless of trauma experienced (>39.0%). PTSD-DS showed a similar trajectory of natural recovery to PTSD, and it was similarly predictive of later PTSD following single-event trauma. Finally, dissociation was a significant factor in PTSS and functional impairment. CONCLUSIONS: These results should be viewed in the context of several limitations including narrow sample of participants which reduces the generalizability of results, concerns around children's ability to conceptualize challenging concepts such as dissociation and the use of self-report measures to form diagnostic groups. The PTSD-DS diagnosis may offer clinical utility to the extant PTSD diagnosis in children and adolescents, as dissociation has been shown to be a contributory factor in the maintenance of both PTSS and functional impairment. Further research is required to inform further editions of the DSM and other diagnostic systems.

An Evaluation of the Use of the Child and Adolescent Scale of Participation (CASP) to Measure Social Participation After Pediatric ABI in a Specialist Service in East Anglia.

Pediatric acquired brain injury (ABI) can lead to lifelong challenges restricting social participation, which is an important goal for rehabilitation due to associations with improved wellbeing. This evaluation considered the utility of the Child Adolescent Scale of Participation (CASP) in ABI rehabilitation services. The 20-item measure is rated on a Likert scale with reference to what the rater would expect of their child at that age, including "not applicable" (N/A). It showed high internal consistency (α = 0.954-0.968). Two-step cluster analysis indicated greater difficulties in children with lower participation, including more impairments of executive function and higher staff involvement. Between-group analysis indicated higher rates of N/A answers for younger children and those of ethnic minorities. Overall, the CASP is reliable and clinically useful on an individual level, helping identify people who may need prioritizing for neurorehabilitation; however, group-level analyses were more challenging due to high frequency of N/A responses.

Prevalence of the dissociative subtype of post-traumatic stress disorder: a systematic review and meta-analysis.

The dissociative subtype of post-traumatic stress disorder (PTSD-DS) was introduced in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), and is characterised by symptoms of either depersonalisation or derealisation, in addition to a diagnosis of post-traumatic stress disorder (PTSD). This systematic review and meta-analysis sought to estimate the point prevalence of current PTSD-DS, and the extent to which method of assessment, demographic and trauma variables moderate this estimate, across different methods of prevalence estimation. Studies included were identified by searching MEDLINE (EBSCO), PsycInfo, CINAHL, Academic Search Complete and PTSDpubs, yielding 49 studies that met the inclusion criteria (N = 8214 participants). A random-effects meta-analysis estimated the prevalence of PTSD-DS as 38.1% (95% CI 31.5-45.0%) across all samples, 45.5% (95% CI 37.7-53.4%) across all diagnosis-based and clinical cut-off samples, 22.8% (95% CI 14.8-32.0%) across all latent class analysis (LCA) and latent profile analysis (LPA) samples and 48.1% (95% CI 35.0-61.3%) across samples which strictly used the DSM-5 PTSD criteria; all as a proportion of those already with a diagnosis of PTSD. All results were characterised by high levels of heterogeneity, limiting generalisability. Moderator analyses mostly failed to identify sources of heterogeneity. PTSD-DS was more prevalent in children compared to adults, and in diagnosis-based and clinical cut-off samples compared to LCA and LPA samples. Risk of bias was not significantly related to prevalence estimates. The implications of these results are discussed further.

Students' Ratings of Their Instructors and the Instructors' Ratings of Students in Educational Psychology.

In six educational psychology classes, 153 students rated their instructors on the Inventory of Student Perceptions of Instruction (ISPI), while the instructors rated individual students on a 12 adjective pair type semantic differential (SD). Responses in each instrument were factor analyzed by the principal components method. Six factors were rotated in the ISPI, and three factors were rotated from SD data. No significant canonical correlation emerged from an analysis of the two subsets of data. Students' ratings of the instructors did not appear to be in the same system of relationships with the instructors' ratings of the value, power, and activity of the students.