Prior studies evaluating knowledge-based interventions on segmentation
In the first study, Zacks et al. (Experiments 2 and 3) recruited participants who were unfamiliar with saxophones and randomly assigned them to a trained group (n = 12) or control group (n = 12)In the second study, Blasing used a quasi-experimental design to study the segmentation of dance movements by dancers (n = 10) and non-dancers (n = 12)In the third study, Levine et al. examined how knowledge influences the perception of goal-directed actionsNotably, most of the sample sizes in these experiments were fairly small (ranging from 8 to 25 participants). Additionally, because Zacks et al. did not include a pre-test baseline measure to evaluate within-group changes, they could only evaluate between-group differences