Vulnerability to depression and cognitive bias modification

Chan, Stella (2012) Vulnerability to depression and cognitive bias modification. Doctoral thesis, University of East Anglia .

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    Background and Aims. Cognitive Bias Modification (CBM) has been found to be
    effective in promoting positive interpretations and mood in adults, including those
    with symptoms of depression and anxiety. However, only four studies have been
    conducted in adolescent populations. This study therefore aimed to further
    investigate the effects of CBM in adolescents, including those who have higher risk
    for developing depression by virtue of neuroticism. Method. This study adopted a
    between-groups experimental design across three time points. Seventy-four
    adolescents aged 16 – 18 were randomised into receiving either two sessions of
    CBM or control intervention. Their interpretation bias and mood were measured at
    baseline, immediately post-training and one week afterwards. Stress vulnerability
    was assessed using a novel experimental stressor; participants were also asked to
    report their daily mood and stressful events over one week. Feedback was collected.
    Results. The CBM group showed a greater reduction in negative affect than the
    control. In addition, the CBM group did not show the increase in state anxiety as
    seen in control participants. However, CBM did not show superior benefits in other
    outcome measures. Both groups displayed an increase in positive interpretations, a
    decrease in negative interpretations, and a reduction in depressive symptoms. The
    two groups did not differ in their responses to stress. Participants with higher scores
    on neuroticism showed higher levels of negative interpretation bias, mood symptoms
    and stress vulnerability. However, there was no evidence to suggest that neuroticism
    acts as a moderator of training effects. Feedback from participants was mostly
    positive. Conclusion. Overall, this study has not yielded strong supportive evidence
    for the use of CBM in healthy or vulnerable adolescents. Despite methodological
    limitations, this study has broadened the evidence base of CBM in adolescent populations. It also represents an important step in developing CBM as a preventive intervention for vulnerable adolescents.

    Item Type: Thesis (Doctoral)
    Faculty \ School: Faculty of Medicine and Health Sciences
    Depositing User: Zoe White
    Date Deposited: 20 Nov 2013 15:17
    Last Modified: 20 Nov 2013 15:17

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