Participants were asked to do this as fast as possible.[1] This tested their selective attention abilities which is to concentrate on relevant stimuli while disregarding irrelevant stimuli.[3] The results of this first experiment illustrated that participants wearing a lab coat made half as many errors than participants who wore their own clothing on incongruent trials.[1] The amount of errors was the same in both groups on non-incongruent trials and there was no variation in the time completing the task in the different conditions.[1] The experiment exhibited how physically wearing a lab coat can increase selective attention on a Stroop task.[1]