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. Author manuscript; available in PMC: 2026 Aug 7.
Published in final edited form as: Psychol Rev. 2024 Jul 11;132(2):330–363. doi: 10.1037/rev0000487

Figure 9. Properties of Button Press Output Time Distribution, Estimated From the Distribution That Should Be Convolved With Saccadic RT to Minimize Its Distance to the Manual RT, as Measured With the Kolmogorov–Smirnov (KS) Statistics.

Figure 9

Note. The 44 data points each represent one participant, across two data sets with fast manual and saccadic responses to peripheral targets without distractors; circles: ignore condition in Campbell et al. (2017); diamonds: Experiment 3 in Bompas et al. (2017). RT data correspond to fast manual and saccadic responses to peripheral targets without distractors. (A) KS statistics for the best-fitting parameters for each type of motor noise considered, from the worst performing (fixed value) to the best (γ distribution). The insert directly compares the most commonly used noisy distribution (uniform) to the best performing (γ). Points show the KS ratio, with values higher than 1 showing better performance for γ. (B) Mean, standard deviation, and skewness of the best-fitting γ distributions across participants. (C) Best fitting individual values for each of the three parameters of the γ distribution. RT = reaction time. See the online article for the color version of this figure.