认知心理学2013-09-05 2:57 AM

A chain-retrieval model for voluntary task switching

Highlights • A formal model of task selection in voluntary task switching is presented and tested. • Model assumes task chain retrieval from long-term memory to guide task selection. • Model shows accounts for task repetition bias and pattern of task choices. • All assumptions of the model are needed to account for the data. • A simplified version of the model accounts for random generation data. Abstract To account for the findings obtained in voluntary task switching, this article describes and tests the chain-retrieval model. This model postulates that voluntary task selection involves retrieval of task information from long-term memory, which is then used to guide task selection and task execution. The model assumes that the retrieved information consists of acquired sequences (or chains) of tasks, that selection may be biased towards chains containing more task repetitions and that bottom-up triggered repetitions may overrule the intended task. To test this model, four experiments are reported. In Studies 1 and 2, sequences of task choices and the corresponding transition sequences (task repetitions or switches) were analyzed with the help of dependency statistics. The free parameters of the chain-retrieval model were estimated on the observed task sequences and these estimates were used to predict autocorrelations of tasks and transitions. In Studies 3 and 4, sequences of hand choices and their transitions were analyzed similarly. In all studies, the chain-retrieval model yielded better fits and predictions than statistical models of event choice. In applications to voluntary task switching (Studies 1 and 2), all three parameters of the model were needed to account for the data. When no task switching was required (Studies 3 and 4), the chain-retrieval model could account for the data with one or two parameters clamped to a neutral value. Implications for our understanding of voluntary task selection and broader theoretical implications are discussed.

KEYWORDS

SHARE & LIKE

COMMENTS

ABOUT THE AUTHOR

认知心理学

0 Following 9 Fans 0 Projects 35 Articles

SIMILAR ARTICLES

Highlights • We compare English acquisition in internationally-adopted preschoolers and infants. • Like infants, preschoolers use one word utteran

Read More

Abstract The sound |faɪv| is visually depicted as a written number word “five” and as an Arabic digit “5.” Here, we present four experiments – two qua

Read More

Infants have a bandwidth-limited object working memory (WM) that can both individuate and identify objects in a scene, (answering ‘how many?’ or ‘what?

Read More

This paper examines the judgment of segmented temporal intervals, using short tone sequences as a convenient test case. In four experiments, we investi

Read More

Much of the research on mathematical cognition has focused on the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9, with considerably less attention paid to more

Read More

It is typically assumed that count nouns like fork act as logical sortals, specifying whether objects are countable units of a kind (e.g., that a whole

Read More

One important function of categories is to permit rich inductive inferences. Prior work shows that children use category labels to guide their inductiv

Read More

The article investigates the mechanisms of selecting and updating representations in declarative and procedural working memory (WM). Declarative WM hol

Read More

Losses were found to improve cognitive performance, and this has been commonly explained by increased weighting of losses compared to gains (i.e., loss

Read More

Three studies compared bilinguals to monolinguals on 15 indicators of executive processing (EP). Most of the indicators compare a neutral or congruent

Read More