STRATEGIC VARIATION IN ORIENTATION TASKS Orientation Tasks with Multiple Views of Space : Strategy Variability and Performance

Three experiments demonstrate that participants vary in their approach to solving an orientation task. Verbal reports from the first study revealed that some participants used a strategy based on mental imagery, while others used a verbal approach. Two follow-up experiments involved training participants to perform the orientation task using one of these strategies. In these experiments, measured by response time and eye movements, performance differed as a function of strategy. An ACT-R model of the task that uses the strategies provides a validation of the proposed mechanisms, producing a close fit to both the response time and eye movement data. The model's success is achieved, in part, by performing all aspects of the task, from processing the information on the screen to making responses. Overall, the results indicate that strategic variability is an important feature of human performance on such

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