Objectives To determine the reliability and effects of a dual-task paradigm on balance and cognitive function compared to a single-task paradigm. Design Repeated measures. Methods Healthy participants (n =23) completed a variation of the Sensory Organization Test and the incongruent Stroop test individually (single-task) and concurrently (dual-task) during two testing sessions. Results The Sensory Organization Test and incongruent Stroop test had moderate to high reliability (1.00>ICC2,k >0.60) under the dual-task conditions. Reaction time was significantly longer (t 21 =−2.54, p =0.019) under the dual-task conditions, while balance scores under one of the four conditions of the Sensory Organization Test (sway floor/fixed wall) were statistically better (t 22 =−3.03, p =0.006) under the dual-task conditions. However, this difference in balance scores may not be clinically meaningful. Conclusions These findings illustrate that the Sensory Organization Test and incongruent Stroop task can be reliably incorporated into a dual-task assessment paradigm. The slowed reaction time under the dual-task paradigm indicates that the dual-task provided an additional cost to cognitive function. Dual-task concussion assessment paradigms involving these two tasks are psychometrically appropriate as well as more representative of actual sporting situations. However, more research should be conducted in a concussed population to further validate this claim.