Table 3.

Reaction time data for the mild TBI, moderate–severe TBI, and control groups

Cognitive test	Mild TBI		Moderate–severe TBI		Controls			Mild TBI vs. controls		Moderate–severe vs. controls		Mild TBI vs. moderate–severe
	Mean	SD	Mean	SD	Mean	SD	Welch's F	Hedges' g	p	Hedges' g	p	Hedges' g	p
Four‐choice compatible RT task	453.0	83.3	517.5	121.6	437.20	90.63	F(2, 69.91) = 5.36, p = .007	−0.18	.365	−0.82	.007	−0.70	.031
Four‐choice incompatible RT task	685.8	195.2	768.1	205.6	638.13	173.76	F(2, 71.46) = 5.17, p = .008	−0.26	.127	−0.72	.013	−0.42	.152

Note: Four‐choice compatible RT task (N _mild = 126, N _{moderate‐severe} = 28, N _controls = 103) and four‐choice incompatible RT task (N _mild = 125, N _{moderate‐severe} = 27, N _controls = 103).

Abbreviations: RT, reaction time; SD, standard deviation; TBI, traumatic brain injury.