Abstract
Errors in simple choice tasks result in systematic changes in the response time and accuracy of subsequent trials. We propose that there are at least two different causes of choice errors - response speed and evidence quality, which result in different types of post-error changes. We explore these differences in types of errors and post-error changes in two recognition memory experiments with speed versus accuracy emphasis conditions that differentially produce response-speed and evidence-quality errors. Under conditions that give rise to more response-speed errors, we find evidence of traditional post-error slowing. Under conditions that give rise to evidence-quality errors, we find evidence of post-error speeding. We propose a broadening of theories of cognitive control to encompass maladaptive as well as adaptive strategies, and discuss implications for the use of post-error changes to measure cognitive control.
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