Terry Ng-Knight

Higher cognitive ability buffers stress-related depressive symptoms in adolescent girls

Stress has been shown to have a causal effect on risk for depression. We investigated the role of cognitive ability as a moderator of the effect of stressful life events on depressive symptoms and whether this varied by gender. Data were analyzed in two adolescent data sets: one representative community sample aged 11-12 years (n = 460) and one at increased familial risk of depression aged 9-17 years (n = 335). In both data sets, a three-way interaction was found whereby for girls, but not boys, higher cognitive ability buffered the association between stress and greater depressive symptoms. The interaction was replicated when the outcome was a diagnosis of major depressive disorder. This buffering effect in girls was not attributable to coping efficacy. However, a small proportion of the variance was accounted for by sensitivity to environmental stressors. Results suggest that this moderating effect of cognitive ability in girls is largely attributable to greater available resources for cognitive operations that offer protection against stress-induced reductions in cognitive processing and cognitive control which in turn reduces the likelihood of depressive symptomatology.

Alcohol misuse in the United Kingdom Armed Forces: A longitudinal study.

OBJECTIVES We assessed changes in Alcohol Use Disorders Identification Test (AUDIT) scores over time. We investigated the impact of life events and changes in mental health status on AUDIT scores over time in UK military personnel. METHODS A random representative sample of regular UK military personnel who had been serving in 2003 were surveyed in 2004-2006 (phase 1) and again in 2007-2009 (phase 2). The impact of changes in symptoms of psychological distress, probable post-traumatic stress disorder (PTSD), marital status, serving status, rank, deployment to Iraq/Afghanistan and smoking was assessed between phases. RESULTS We found a statistically significant but small decrease in AUDIT scores between phases 1 and 2 (mean change=-1.01, 95% confidence interval=-1.14, -0.88). Participants reported a decrease in AUDIT scores if they experienced remission in psychological distress (adjusted mean -2.21, 95% CI -2.58, -1.84) and probable PTSD (adjusted mean -3.59, 95% CI -4.41, -2.78), if they stopped smoking (adjusted mean -1.41, 95% CI -1.83, -0.98) and were in a new relationship (adjusted mean -2.77, 95% CI -3.15, -2.38). On the other hand, reporting new onset or persistent symptoms of probable PTSD (adjusted mean 1.34, 95% CI 0.71, 1.98) or a relationship breakdown (adjusted mean 0.53, 95% CI 0.07, 0.99) at phase 2 were associated with an increase in AUDIT scores. CONCLUSIONS The overall level of hazardous alcohol consumption remains high in the UK military. Changes in AUDIT scores were linked to mental health and life events but not with deployment to Iraq or Afghanistan.

A longitudinal high-risk study of adolescent anxiety, depression and parent-severity on the developmental course of risk-adjustment

Background Adolescence is associated with developments in the reward system and increased rates of emotional disorders. Familial risk for depression may be associated with disruptions in the reward system. However, it is unclear how symptoms of depression and anxiety influence the development of reward-processing over adolescence and whether variation in the severity of parental depression is associated with hyposensitivity to reward in a high-risk sample. Methods We focused on risk-adjustment (adjusting decisions about reward according to the probability of obtaining reward) as this was hypothesized to improve over adolescence. In a one-year longitudinal sample (N = 197) of adolescent offspring of depressed parents, we examined how symptoms of depression and anxiety (generalized anxiety and social anxiety) influenced the development of risk-adjustment. We also examined how parental depression severity influenced adolescent risk-adjustment. Results Risk-adjustment improved over the course of the study indicating improved adjustment of reward-seeking to shifting contingencies. Depressive symptoms were associated with decreases in risk-adjustment over time while social anxiety symptoms were associated with increases in risk-adjustment over time. Specifically, depression was associated with reductions in reward-seeking at favourable reward probabilities only, whereas social anxiety (but not generalized anxiety) led to reductions in reward-seeking at low reward probabilities only. Parent depression severity was associated with lowered risk-adjustment in offspring and also influenced the longitudinal relationship between risk-adjustment and offspring depression. Conclusions Anxiety and depression distinctly alter the pattern of longitudinal change in reward-processing. Severity of parent depression was associated with alterations in adolescent offspring reward-processing in a high-risk sample.

Co-Development of Educational Expectations and Effort: Their Antecedents and Role as Predictors of Academic Success

This study examined the co-development of educational expectations and effort (conceptualized as indicators of individual agency) during secondary school and assessed their role as predictors of academic success, controlling for prior academic attainment and parental social background. Drawing on data collected for the Longitudinal Study of Young People in England (LSYPE), a nationally representative sample, the findings suggest reciprocal effects between expectations and effort, shaped by family SES and prior academic attainment. Agency is not a static construct, it is not fully determined by family SES and students adapt their functioning and choices in response to informative feedback loops.

Can locus of control compensate for socioeconomic adversity in the transition from school to work

Internal locus of control is associated with academic success and indicators of wellbeing in youth. There is however less understanding regarding the role of locus of control in shaping the transition from school to work beyond the more widely studied predictors of socioeconomic background and academic attainment. Guided by a socio-ecological model of agency, the current study examines to which extent internal locus of control, understood as an indicator of individual agency, can compensate for a lack of socioeconomic resources by moderating the association between parental disadvantage and difficulties in the transition from school to work. We draw on data collected from a longitudinal nationally representative cohort of 15,770 English youth (48% female) born in 1989/90, following their lives from age 14 to 20. The results suggest that the influence of agency is limited to situations where socioeconomic risk is not overpowering. While internal locus of control may help to compensate for background disadvantage regarding avoidance of economic inactivity and unemployment to some extent, it does not provide protection against long-term inactivity, i.e. more than 6 months spent not in education, employment or training.

Maternal depressive symptoms and adolescent academic attainment: Testing pathways via parenting and self-control

Maternal depression is associated with reduced academic attainment in children, however, it is not clear how this association comes about. Depressive symptoms are associated with impairment in social roles including parenting. Childrens self-control is an important contributor to academic attainment and is influenced by parenting. We therefore hypothesised that impaired parenting and childrens self-control may mediate links between maternal depression and childrens academic attainment. Data were from a brief longitudinal study (3 waves) of UK children aged 11-12 years and their mothers. Higher maternal depressive symptoms at baseline were associated with lower academic attainment in children assessed one year later. There was evidence to support an indirect effect of maternal depressive symptoms on childrens academic attainment through the mother-child and the father-child relationship which, in turn, reduced childrens self-control. These influences were independent of socio-economic deprivation. A direct effect of maternal depression on childrens academic attainment was also observed.