Visual analysis is a cornerstone of data interpretation in Applied Behavior Analysis It allows practitioners to make immediate and informed decisions about intervention effectiveness without the necessity of complex statistical analyses especially in a clinical context When evaluating graphed data a BCBA primarily examines three fundamental properties level the value of the data points on the vertical axis trend the overall direction of the data path and variability the degree to which data points are spread out around the mean or median In this scenario comparing the intervention series Series 3 demonstrates the lowest and most stable level of aggression consistent 1 instance per session for three days with a clear decreasing trend from baseline and minimal variability While Series 4 also shows a reduction its level is slightly higher or less consistent than Series 3 1 instance for one day then 2 instances for two days Series 2 though an improvement from baseline is clearly less effective than Series 3 and 4 Therefore based on a visual inspection of these data characteristics Series 3 is identified as the most effective intervention given the available data Continuing data collection might provide more evidence for longterm trends but a conclusion about current effectiveness can be drawn Using a multiple baseline or reversal design would be for initial evaluation or further analysis of functional relations not for determining effectiveness from already collected intervention data where visual analysis is sufficient