Prospective memory and pediatric traumatic brain injury: effects of cognitive demand.

This study investigated the effects of pediatric traumatic brain injury (TBI) on prospective memory. Fourteen children and 14 adolescents with TBI were compared with 25 and 23 noninjured children and adolescents, respectively. Based on a prefrontal model, the cognitive demand on the ongoing component of a prospective-memory task was manipulated. Overall, those with TBI had poorer prospective-memory performance than their noninjured peers. Performance was worse in a high cognitive-demand condition than a low, and younger children performed worse than adolescents. Decreases in performance from the low- to high-demand conditions were not significantly different between the two children's groups but were between the two adolescents' groups. Furthermore, the age and injury effects were reflected in the performances on executive function tests: the Self-ordered Pointing Task (SOPT), and the Stroop Color Word Interference Test. The Tower of London (TOL), which did not produce age or injury effects, was nevertheless found to be an important predictor of performance on the high-demand task in those with TBI. Although previous research has demonstrated impaired prospective memory performance in children with TBI, this study attempted to explain why this might occur, specifically that the prefrontal regions might be implicated.     

Object-based attention is mediated by collinearity of targets

Same-object bias occurs when tasks associated with processing a single object are faster than tasks associated with two objects. Over five experiments we assessed whether same-object bias is mediated by the collinearity of the targets. Participants decided whether two targets, presented either within a single object or across two objects, were the same or different. Results showed that same-object bias only occurred when targets appeared on the same straight line within the same object. When targets appeared in the same object but were separated by an angle or corner, within-object facilitation was eliminated or greatly reduced. In a final experiment, response times to two targets that were collinear but on separate objects were responded to faster than were noncollinear targets on the same object. This suggests that collinearity between targets mediates the effect found in this paradigm, at least to a greater extent than colour grouping.     

Resolving the latent structure of schizophrenia endophenotypes using expectation-maximization-based finite mixture modeling

Prior research has focused on the latent structure of endophenotypic markers of schizophrenia liability, or schizotypy. The work supports the existence of 2 relatively distinct latent classes and derives largely from the taxometric analysis of psychometric values. The present study used finite mixture modeling as a technique for discerning latent structure and the laboratory-measured endophenotypes of sustained attention deficits and eye-tracking dysfunction as endophenotype indexes. In a large adult community sample (N=311), finite mixture analysis of the sustained attention index d' and 2 eye-tracking indexes (gain and catch-up saccade rate) revealed evidence for 2 latent components. A putative schizotypy class accounted for 27% of the sample. A supplementary maximum covariance taxometric analysis yielded highly consistent results. Subjects in the schizotypy component displayed higher rates of schizotypal personality features and an increased rate of treated schizophrenia in their 1st-degree biological relatives compared with subjects in the other component. Implications of these results are examined in light of major theories of schizophrenia liability, and methodological advantages of finite mixture modeling for psychopathology research, with particular emphasis on genomic issues, are discussed.     

A controlled evaluation of group cognitive therapy in the treatment of irritable bowel syndrome

We randomized, at two sites, 210 patients with Rome II diagnosed irritable bowel syndrome (IBS), of at least moderate severity, to one of three conditions: group-based cognitive therapy (CT; n=120), psychoeducational support groups (n=46) as an active control, or intensive symptom and daily stress monitoring (n=44). One hundred eighty-eight participants completed the initial treatment. Those in symptom monitoring were then crossed over to CT. For an intent to treat analysis on a composite GI symptom measure derived from daily symptom diaries, both CT and the psychoeducational support groups were significantly more improved than those in the intensive symptom monitoring condition, but the CT and psychoeducational support group did not differ. Among treatment completers on the same composite measure of GI symptoms, again, both CT and psychoeducational support groups were statistically superior to symptom monitoring but did not differ on the symptom composite, or on any other measure. On individual IBS symptoms, both CT and psychoeducational support were statistically superior to symptom monitoring on reductions in abdominal pain and tenderness and for flatulence. Patient global ratings at the end of treatment showed the two active conditions statistically superior to symptom monitoring on change in Bowel Regularity, with CT superior to symptom monitoring on reduction in overall pain and in improvement in sense of well-being. Three-month follow-up data on 175 patients revealed maintenance of significant improvement or continued significant improvement on all IBS symptoms, including the McGill Pain Questionnaire. Group CT and psychoeducational support groups continued not to differ on any measure. We thus conclude that group CT is not superior to an attention placebo control condition.     

Parenting and Prematurity: Understanding Parent Experience and Preferences for Support

Infants born very preterm are at risk of developmental and behavioural problems and their parents are at risk of psychological distress and compromised parenting. This study has two key aims: (1) to identify, from the parents’ own perspective, the unique aspects of parenting an infant born very preterm and (2) to assess parent preferences for support including opinions of a new, tailored parenting intervention, Prem Baby Positive Parenting Program (Triple P). A qualitative approach was taken with focus groups of 18 parents of infants born preterm and a thematic analysis conducted. Parents identified several unique aspects of parenting an infant born preterm including: difficulty coping with the stress of hospitalisation; institutionalisation to the hospital environment; a lack of preparation for the transition to parenthood; grief; isolation; getting into “bad parenting habits” of overnurturance and a lack of certainty about developmental expectations. Parents preferred parenting support that is tailored to parents of infants born preterm, has flexible delivery, enhances coping skills and the spousal relationship and is sensitive to the emotional context of parenting an infant born preterm. Understanding the experiences and the preferences of parents of infants born preterm is an important step in tailoring parenting interventions to fit their needs.     

Bound to Feel Bad About Oneself: Relations Between Attachment and the Self-conscious Emotions of Guilt and Shame in Children and Adolescents

Two cross-sectional studies were conducted to explore the relationship between attachment and the self-conscious emotions of guilt and shame in childhood. Study 1 was performed in non-clinical children aged 9–13 years (N = 688) who completed a single-item measure of attachment style and a vignette-based instrument for assessing guilt and shame. Results showed that children who classified themselves as insecurely attached displayed higher levels of shame and maladaptive types of guilt as compared to securely attached children. Study 2 was conducted in adolescents aged 12–18 years (N = 135), of whom the majority was referred to a clinical setting because of externalizing problems. Adolescents filled in a dimensional scale for measuring attachment quality to parents and peers and the above mentioned vignette-based instrument of guilt and shame. It was found that the clinical adolescents generally exhibited lower levels of self-conscious emotions as compared to non-clinical adolescents. Within this clinical group, communication to parents and peers was associated with higher levels of self-conscious emotions, and alienation was accompanied by higher levels of maladaptive forms of guilt and shame. Altogether, these results fit with the theory that attachment (in)security is involved in people’s proneness to experience self-conscious emotions.