Main results.

Panel a) displays the proportion correct and Panel b) the reaction time results for the transsaccadic experiment. c) Reaction time results for the intrafixation control experiment. Error bars denote 95% confidence intervals of the effect variability across subjects. That is, the standard error for each condition was computed as the standard deviation of the subjects' mean score for that condition relative to their overall mean score, divided by the square root of the number of subjects. Different symbols illustrate the performances of different participants. The first author's data is in all three graphs symbolized by the circular marker; the markers of the other subjects correspond to one another in the first two graphs only.