The Role of Input and Output Modality Pairings in Dual-Task Performance: Evidence for Content-Dependent Central Interference
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| Title: | The Role of Input and Output Modality Pairings in Dual-Task Performance: Evidence for Content-Dependent Central Interference |
|---|---|
| Language: | English |
| Authors: | Hazeltine, Eliot, Ruthruff, Eric, Remington, Roger W. |
| Source: | Cognitive Psychology. Jun 2006 52(4):291-345. |
| Availability: | Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com. |
| Peer Reviewed: | Y |
| Page Count: | 55 |
| Publication Date: | 2006 |
| Document Type: | Journal Articles Reports - Research |
| Descriptors: | Learning Modalities, Auditory Stimuli, Visual Stimuli, Inhibition, Input Output Analysis, Shift Studies, Cost Effectiveness, Reaction Time, Item Response Theory, Task Analysis, Experimental Groups |
| DOI: | 10.1016/j.cogpsych.2005.11.001 |
| ISSN: | 0010-0285 |
| Abstract: | Recent debate regarding dual-task performance has focused on whether costs result from limitations in central capacity, and whether central operations can be performed in parallel. While these questions are controversial, the dominant models of dual-task performance share the assumption that central operations are generic--that is, their interactions are independent of stimulus and response modalities. To examine these issues, we conducted a series of dual-task experiments with different input and output modality pairings. One condition combined a visual-manual task with an auditory-vocal task, and the other condition reversed the input-output pairings, combining a visual-vocal task with an auditory-manual task. Input/output modality pairings proved to be a key factor; throughout practice, dual-task costs were generally more than twice as large with visual-vocal/auditory-manual tasks than with the opposite arrangement of modalities (Experiments 1 and 2). These differences could be explained neither by competition for peripheral resources nor by differences in single-task response times (Experiment 3). Moreover, the persistent dual-task costs did not appear to stem from a central bottleneck. Contrary to the dominant models of dual-task performance, we propose that central interference between tasks depends not just on the duration of central operations, nor just strategic adaptation, but also on the content of those operations. Implications for structural and strategic accounts of dual-task interference are discussed. |
| Abstractor: | Author |
| Entry Date: | 2006 |
| Accession Number: | EJ737554 |
| Database: | ERIC |
| Abstract: | Recent debate regarding dual-task performance has focused on whether costs result from limitations in central capacity, and whether central operations can be performed in parallel. While these questions are controversial, the dominant models of dual-task performance share the assumption that central operations are generic--that is, their interactions are independent of stimulus and response modalities. To examine these issues, we conducted a series of dual-task experiments with different input and output modality pairings. One condition combined a visual-manual task with an auditory-vocal task, and the other condition reversed the input-output pairings, combining a visual-vocal task with an auditory-manual task. Input/output modality pairings proved to be a key factor; throughout practice, dual-task costs were generally more than twice as large with visual-vocal/auditory-manual tasks than with the opposite arrangement of modalities (Experiments 1 and 2). These differences could be explained neither by competition for peripheral resources nor by differences in single-task response times (Experiment 3). Moreover, the persistent dual-task costs did not appear to stem from a central bottleneck. Contrary to the dominant models of dual-task performance, we propose that central interference between tasks depends not just on the duration of central operations, nor just strategic adaptation, but also on the content of those operations. Implications for structural and strategic accounts of dual-task interference are discussed. |
|---|---|
| ISSN: | 0010-0285 |
| DOI: | 10.1016/j.cogpsych.2005.11.001 |
