Individual differences on speeded cognitive tasks: Comment on Chen, Hale, and Myerson (2007)
| Autor: | Fábio Pitombo Leite, Corey N. White, Roger Ratcliff |
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| Rok vydání: | 2007 |
| Předmět: |
Psychological Tests
Elementary cognitive task biology Experimental and Cognitive Psychology Function (mathematics) biology.organism_classification Standard deviation law.invention Correlation Cognition Chen Arts and Humanities (miscellaneous) Group differences law Difference engine Statistics Reaction Time Developmental and Educational Psychology Humans Psychology |
| Zdroj: | Psychonomic Bulletin & Review. 14:1007-1009 |
| ISSN: | 1531-5320 1069-9384 |
| DOI: | 10.3758/bf03194136 |
| Popis: | Chen, Hale, and Myerson (2007) recently reported a test of the difference engine model (Myerson, Hale, Zheng, Jenkins, & Widaman, 2003). This test evaluated whether the standard deviation (SD) is proportional to the amount of processing—that is, mean reaction time (RT)—in a speeded cognitive task. We show that this evaluation is not a test of the model because its finding is a consequence of relationships in the data. We argue any model structure that produces increasing values of RT as a function of difficulty, with different slopes for different individuals, necessarily produces a correlation between SD and mean RT. We illustrate this with a different model structure—that is, the diffusion model proposed by Ratcliff (1978)—showing that it produces a fan out between fast- and slow-group means and produces the correlation between SD and mean RT that matches the empirical result. |
| Databáze: | OpenAIRE |
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