Eye and head movements were recorded as unrestrained subjects tapped or only looked at nearby targets. Scanning patterns were the same in both tasks: subjects looked at each target before tapping it; visual search had similar speeds and gaze-shift accuracies. Looking however, took longer and, unlike tapping, benefitted little from practice. Looking speeded up more than tapping when memory load was reduced: memory was more efficient during tapping. Conclusion: eye movements made when only looking are different from those made when tapping. Visual search functions as a separate process, incorporated into both tasks: it can be used to improve performance when memory load is heavy.

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doi.org/10.1016/0042-6989(95)00080-X, hdl.handle.net/1765/64058
Vision Research
Department of Neuroscience

Epelboim, J, Steinman, R.M, Kowler, E, Edwards, M, Pizlo, Z, Erkelens, D.W, & Collewijn, H. (1995). The function of visual search and memory in sequential looking tasks. Vision Research, 35(23-24), 3401–3422. doi:10.1016/0042-6989(95)00080-X