The experiment from which these data are taken required participants to press a response key whenever they saw an oddball stimulus – a zebra. The groups did not differ in the number of responses made, TD = 34.3 [33.0 36.9], ASD = 34.5 [32.2 36.3], t(20) < 1, p = 0.657, in mean reaction time TD = 393.3 [363 413], ASD = 412.4 [378 431], t(20) = 1.37, p = 0.307, nor in the mean MAD estimate of reaction time variability, TD = 45.1 [34.4 52.5], ASD = 38.2 [28.2 48.1], t(20) < 1, p = 0.423. However, there was a significant relationship between reaction time variability and peak amplitude variability, rs(22) = 0.479, p = 0.024. (Behavioral data from three participants with ASD was unavailable due to a technical fault.)