Match to Sample Visual Search is a simultaneous visual search task with response latency dissociated from movement time. Efficient performance on this task requires the ability to search among the targets and ignore the distractor patterns which have elements in common with the target.
The participant is shown a complex visual pattern in the middle of the screen. After a brief delay, a varying number of similar patterns are shown in a circle of boxes around the edge of the screen. Only one of these boxes matches the pattern in the centre of the screen and the participant must indicate which it is by selecting it.
The outcome measures for this task cover number and percentage correct, movement and reaction times.
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