Task Components and Demands as Factors in Dual-Task Performance.
ILLINOIS UNIV AT URBANA-CHAMPAIGN SAVOY AVIATION RESEARCH LAB
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This study explored the effects of interference between tasks as related to their specific functional requirements and under changing priorities. Four tasks were performed singly and in all pairwise combinations to compare their mutual interference levels. The tasks were one-dimensional compensatory tracking, and three self-paced Keyboard response tasks, one requiring a transformation by categorizing, one requiring storing and responding with the previous stimulus, and one requiring no intervening activity between stimulus recognition and response. Tracking paired with any of the the three Keyboard tasks was least interfering, Tracking and Tracking was moderately interfering, and KeyboardKeyboard combinations the most interfering, suggesting that qualitatively dissimilar tasks are performed better than functionally similar tasks. The Keyboard task requiring continuous storing and response to the previous stimulus was highly disruptive when paired with other Keyboard tasks, and showed little evidence of interweaving with them, while the transformation Keyboard task was not as disruptive and could be interweaved with itself or the simple Keyboard task.
- Human Factors Engineering and Man Machine Systems