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Lawson et al. (2002) Lawson et al. (2002) used blink reflex magnitude to measure interpretive bias in depression. In a normal population the magnitude.

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Presentation on theme: "Lawson et al. (2002) Lawson et al. (2002) used blink reflex magnitude to measure interpretive bias in depression. In a normal population the magnitude."— Presentation transcript:

1 Lawson et al. (2002) Lawson et al. (2002) used blink reflex magnitude to measure interpretive bias in depression. In a normal population the magnitude of the blink reflex is larger in response to negative target stimuli than in response to neutral target stimuli. stimuli We blink more to words such as GLOOM than BLOOM. © POSbase 2006 Biased Interpretation in Depression Contributor

2 If depressed people interpret ambiguous information negatively, it would be expected that they will show a large blink reflex to ambiguous and negative words while a non-depressed population will show a large reflex to only negative words. © POSbase 2006 Biased Interpretation in Depression

3 Subjects: 54 Psychology students were given the BDI 27 High BDI (M = 18.6) 27 Low BDI (M = 1.4)BDI Design: Mixed. 2 (BDI) x 3 (target stimuli). Method: Presented with 60 trials of auditory stimuli. 20 negative words (fright; lonely; grief) 20 neutral words (bright; lovely; brief) 20 ambiguous words (*right; lo*ely; *rief) Biased Interpretation in Depression © POSbase 2006

4 High BDI Group  Blink reflexes were significantly larger for ambiguous words than for neutral words.  No significant difference between ambiguous & negative. Low BDI Group  No significant differences between ambiguous and neutral.  Blink reflexes were significantly smaller for the ambiguous words than for the negative words. Biased Interpretation in Depression © POSbase 2006

5 These results support the hypothesis that the depressed group showed a biased negative interpretation of ambiguous stimuli. The study has a quasi-experimental design. While these findings demonstrate an association between depressive symptoms and negative interpretation, they do not indicate the causal nature of this association. Biased Interpretation in Depression © POSbase 2006

6 Biased interpretation could be:  The result of depressive symptomatology;  Represent the causes of the symptomatology;  Another variable could be responsible for both the interpretations and the symptomatology. Biased Interpretation in Depression © POSbase 2006

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