Laterality differences and practice effects under central backward masking conditions

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Abstract
Critical stimulus onset asynchrony was determined for subjects (human) on 3 consecutive days using single letters as target stimuli (TS) and a pattern masking stimulus (MS). There was a right visual field (RVF) advantage on day 1 but no difference between the visual fields on following days. The decline in the RVF advantage was dependent upon prior experience with laterally located letters, was independent of initial experience with a particular set of letters and was more pronounced for females than for males. Large improvements in performance were found, particularly between the 1st and 2nd testing sessions. These practice effects were discussed in terms of the possible development of strategies for enhancing TS features or attenuating MS features.