Switching between simple cognitive tasks: the interaction of top-down and bottom-up factors.
J Exp Psychol Hum Percept Perform
; 27(6): 1404-19, 2001 Dec.
Article
en En
| MEDLINE
| ID: mdl-11766933
ABSTRACT
How do top-down factors (e.g., task expectancy) and bottom-up factors (e.g., task recency) interact to produce an overall level of task readiness? This question was addressed by factorially manipulating task expectancy and task repetition in a task-switching paradigm. The effects of expectancy and repetition on response time tended to interact underadditively, but only because the traditional binary task-repetition variable lumps together all switch trials, ignoring variation in task lag. When the task-recency variable was scaled continuously, all 4 experiments instead showed additivity between expectancy and recency. The results indicated that expectancy and recency influence different stages of mental processing. One specific possibility (the configuration-execution model) is that task expectancy affects the time required to configure upcoming central operations, whereas task recency affects the time required to actually execute those central operations.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Cognición
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
J Exp Psychol Hum Percept Perform
Año:
2001
Tipo del documento:
Article
País de afiliación:
Estados Unidos