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Sternberg introduced the additive factor method as a tool for discovering and studying in choice reaction time situations in human subjects. Underlying the method is the notion that if information processing consists of successive stages, then different factors affecting different stages must have additive effects on reaction-time measurements. The additive factor method has been extensively used...
Depressed subjects are slower than normal controls in reaction time (RT) tasks. However, it is not clear whether depression affects all stages of information-processing or only some of them. In the present study, this question was addressed by using the additive factor method. Ten inpatients and ten control subjects performed a two-choice visual RT task. Stimulus intensity and stimulus-response...
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