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The Effect of Target Position and Tactual Recognition Field Size on Touch Bias

Past studies have shown that touchscreen display angles other than those that perpendicularly bisect the operator's line of sight cause the operator to touch slightly below the target. The amount of bias created from this misjudgment fluctuates according to the target's position on the screen. Additionally, the percentage of touches that activate a specific target varies according to the size of the tactual recognition field. This study sought to match three square tactual recognition field sizes with the amount of touch bias occurring in each location. The results showed that although bias differed according to location, the tactual recognition fields did not vary enough in size, nor were they large enough to find a significant difference between them in the number of touches captured according to the location of the target. The tactual recognition field that optimally captures responses varies in size over display position and is non-square in shape.