Dysphoria and memory for emotional material: A diffusion-model analysis

Corey White, Roger Ratcliff, Michael Vasey, Gail McKoon

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Depression-related differences in memory for emotional material are well established, but recognition memory and lexical decision tasks often fail to produce consistent results. The null results from these tasks could be due to inadequacies in traditional analyses rather than the absence of effects. In particular, analyses of accuracy or mean reaction times rely on only a fraction of the behavioural data and are sensitive to individual differences in response biases. The diffusion model addresses these limitations by incorporating all of the behavioural data and separating out response biases. We applied the diffusion model to data from lexical decision and recognition memory tasks and showed consistent effects, specifically a positive emotional bias in non-dysphoric subjects and even-handedness in dysphoric subjects. This pattern was not apparent with comparisons of reaction times or accuracy, consistent with previous null findings. These results suggest a relationship between dysphoria and the internal representation of emotional information.

Original languageEnglish (US)
Pages (from-to)181-205
Number of pages25
JournalCognition and Emotion
Volume23
Issue number1
DOIs
StatePublished - 2009

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)

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