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Log odds ratio for the associations between likelihood of response to placebo and sertraline with (a) choice reaction time task and (b) A-not-B reaction time task. Greater improvements in psychomotor and cognitive processing speeds within the first week, as well as better pretreatment performance, were specifically associated with higher likelihood of response to placebo. ⍿p <0.10, *p <0.05, **p <0.01, ***p <0.001.
