Summary of subgroup analysis results for choice reaction time intra-individual variability studies.

<p><i>Note.</i> CRT IIV = choice reaction time intra-individual variability, CV = coefficient of variation, ES = effect size (Cohen's d), ISD = intra-individual standard deviation, PI = preparatory interval.</p>a<p>p value for overall between subgroup heterogeneity.</p

Effect sizes for old versus young comparisons in mean-adjusted simple reaction time intra-individual variability studies.

<p>Effect sizes for old versus young comparisons in mean-adjusted simple reaction time intra-individual variability studies.</p

Effect sizes for old versus middle-aged comparisons in raw simple reaction time intra-individual variability studies.

<p>Effect sizes for old versus middle-aged comparisons in raw simple reaction time intra-individual variability studies.</p

Summary of subgroup analysis results for simple reaction time intra-individual variability studies.

<p>Note. SRT IIV = simple reaction time intra-individual variability, CV = coefficient of variation, ES = effect size (Cohen's d), ISD = intra-individual standard deviation, PI = preparatory interval.</p>a<p>p value for overall between subgroup heterogeneity.</p

Funnel plots showing little evidence of publication bias of raw or mean-adjusted simple reaction time intra-individual variability studies (left panel), with some bias apparent among studies of raw and mean-adjusted choice reaction time intra-individual variability (right panel).

<p>Open symbols = actual studies, filled symbols = “missing” data points identified by the trim and fill procedure (Duval & Tweedie, 2000a,b).</p

Effect sizes for old versus young comparisons in raw simple reaction time intra-individual variability studies.

<p>Effect sizes for old versus young comparisons in raw simple reaction time intra-individual variability studies.</p

Effect sizes for old versus young comparisons in mean-adjusted choice reaction time intra-individual variability studies.

<p>Effect sizes for old versus young comparisons in mean-adjusted choice reaction time intra-individual variability studies.</p

Sample characteristics of studies included in the review of simple and choice reaction time intra-individual variability studies.

<p><i>Note</i>. Numbers of participants reflect actual numbers used to obtain estimates of intra-individual variability and may differ from those reported in papers.</p><p>M = males, F = females, NR = not reported, SRT = Simple Reaction Time, CRT = Choice Reaction Time.</p

Effect sizes for old versus middle-aged comparisons in raw choice reaction time intra-individual variability studies.

<p>Effect sizes for old versus middle-aged comparisons in raw choice reaction time intra-individual variability studies.</p

Effect sizes for old versus middle-aged comparisons in mean-adjusted choice reaction time intra-individual variability studies.

<p>Effect sizes for old versus middle-aged comparisons in mean-adjusted choice reaction time intra-individual variability studies.</p