Cognitive Behavioral Therapy for Schizophrenia: An Empirical Review
ABSTRACT Early case studies and noncontrolled trial studies focusing on the treatment of delusions and hallucinations have laid the foundation for more recent developments in comprehensive cognitive behavioral therapy (CBT) interventions for schizophrenia. Seven randomized, controlled trial studies testing the efficacy of CBT for schizophrenia were identified by electronic search (MEDLINE and PsychInfo) and by personal correspondence. After a review of these studies, effect size (ES) estimates were computed to determine the statistical magnitude of clinical change in CBT and control treatment conditions. CBT has been shown to produce large clinical effects on measures of positive and negative symptoms of schizophrenia. Patients receiving routine care and adjunctive CBT have experienced additional benefits above and beyond the gains achieved with routine care and adjunctive supportive therapy. These results reveal promise for the role of CBT in the treatment of schizophrenia although additional research is required to test its efficacy, long-term durability, and impact on relapse rates and quality of life. Clinical refinements are needed also to help those who show only minimal benefit with the intervention.
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- "We found that persons with more significant neurocognitive impairments were more likely to have more severe alexithymia, raising the possibility that for such persons, certain treatments may be complicated by both neurocognitive compromise and self-reflective deficits. To be specific, difficulties with memory and identifying feelings could pose challenges for cognitive-behavioral therapy for schizophrenia, which has been found to be efficacious, though not for all persons with the disorder (Rector and Beck, 2012). With less developed or lost abilities to remember and process specific events and thoughts, and identify corresponding emotions, other treatments may be necessary in order to promote recovery from schizophrenia. "
ABSTRACT: While alexithymia, or difficulties identifying and describing affect, has been commonly observed in schizophrenia, little is known about its causes and correlates. To test the hypothesis that deficits in emotion identification and expression result from, or are at least related to, deficits in neurocognition and affective symptoms, we assessed alexithymia using the Toronto Alexithymia Scale (TAS-20), symptoms using the Positive and Negative Syndrome Scale (PANSS), and neurocognition using the MATRICS battery among 65 adults with schizophrenia spectrum disorders in a non-acute phase of illness. Partial correlations controlling for the effects of social desirability revealed that difficulty identifying feelings and externally oriented thinking were linked with greater levels of neurocognitive deficits, while difficulty describing feelings was related to heightened levels of emotional distress. To explore whether neurocognition and affective symptoms were uniquely related to alexithymia, a multiple regression was conducted in which neurocognitive scores and affective symptoms were allowed to enter to predict overall levels of alexithymia after controlling for social desirability. Results revealed both processing speed and anxiety uniquely contributed to the prediction of the total score on the TAS-20. Results suggest that dysfunctions in both cognitive and affective processes may be related to alexithymia in schizophrenia independently of one another.04/2014; 218(1-2). DOI:10.1016/j.psychres.2014.04.020
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- "To date meta-analyses of CBT for psychosis (CBTp) have evaluated the effects in terms of effects on the frequency and severity of positive symptoms (Gould et al., 2001; Rector and Beck, 2001; Zimmermann et al., 2005; Wykes et al., 2008; NICE, 2009), negative symptoms (Rector and Beck, 2001; Wykes et al., 2008) and general symptoms (Tarrier and Wykes, 2004; NICE, 2009; Jones et al., 2012), but none focussed on and differentiated between auditory hallucinations and delusions . CBTp does not aim to reduce the frequency and severity of symptoms, but rather to reappraise the meaning and purpose of hallucinations and delusions to reduce distress and improve coping in daily life (Birchwood and Trower, 2006). "
ABSTRACT: There is no meta-analysis of cognitive behavioural therapy for delusions and hallucinations separately. The aim of this meta-analysis is to evaluate the end-of-treatment effects of individually tailored case-formulation cognitive behavioural therapy on delusions and auditory hallucinations using symptom-specific outcome measures. A systematic search of the trial literature was conducted in MEDLINE, PSYCHINFO and EMBASE. Eighteen studies were selected with symptom specific outcome measures. Hedges' g was computed and outcomes were pooled meta-analytically using the random-effects model. Our main analyses were with the selected studies with CBT using individually tailored case-formulation that aimed to reduce hallucinations and delusions. The statistically significant effect-sizes were 0.36 with delusions and 0.44 with hallucinations, which are modest and in line with other recent meta-analyses. Contrasted with active treatment, CBT for delusions lost statistical significance (0.33), but the effect-size for CBT for hallucinations increased (0.49). Blinded studies reduced effect-size in delusions (0.24) and gained some in hallucinations (0.46). There was no heterogeneity in hallucinations and moderate heterogeneity in delusion trials. We conclude that CBT is effective in treating auditory hallucinations. CBT for delusions is also effective, but the results must be interpreted with caution, because of heterogeneity and the non-significant effect-sizes when compared with active treatment.Schizophrenia Research 04/2014; DOI:10.1016/j.schres.2014.03.016 · 4.43 Impact Factor
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- "The present study tests this very question, using a brief discussion of the JTC bias to determine if such a discussion could affect how individuals reason on decision making tasks. As recent research indicates it is possible to make changes to the JTC bias (e.g., Ross et al., 2011), and because CBT, which promotes modifying distorted thinking, has been shown to be useful for individuals with delusions (e.g., Rector and Beck, 2012), it was expected that individuals in the Jumping to Conclusions Discussion condition would request more stimuli before making a decision than individuals who did not receive this discussion due to the targeted nature of the discussion , even when participants were presented emotional material, material which has been shown in prior research to exacerbate the bias (e.g., Dudley et al., 1997). "
ABSTRACT: The present study was an investigation of the impact a brief intervention designed to raise awareness of a cognitive bias known to be robust for individuals with delusions has on the reasoning strategies of individuals with delusions. Individuals with delusions (n=57) were randomly assigned either to receive or not to receive a discussion of the jumping to conclusions bias and its pitfalls. Participants' performance on 3 reasoning trials - 1 emotionally neutral (beads) and 2 emotionally salient (self-referred survey words) - was then assessed; the number of stimuli participants requested before making a decision was evaluated to determine if the Jumping to Conclusions Discussion resulted in increased data gathering. There was no difference between groups (those who received and those who did not receive the Jumping to Conclusions Discussion) in terms of how many beads they gathered (p=.36), but there were significant differences on both reasoning trials of emotionally salient stimuli (p's<.05), such that participants who received the Jumping to Conclusions Discussion requested more stimuli on those tasks than individuals who did not receive the discussion. Thus, results suggest that discussion of the jumping to conclusions bias may impact the bias directly, at least for material that is emotional in nature. Results are discussed in terms of their relevance to cognitive behavioral therapies for psychosis and existing research on reasoning and delusions.Schizophrenia Research 09/2013; 150(2-3). DOI:10.1016/j.schres.2013.09.003 · 4.43 Impact Factor