Final answer:
The most common type of graph used in Applied Behavior Analysis (ABA) is the line graph, which is highly effective for showing changes in behavior over time and identifying trends linked to interventions.
Step-by-step explanation:
Line graphs are a common form of graphical representation used to show the relationship between two variables, typically with one measured on the horizontal axis and the other on the vertical axis. For instance, they are often employed to illustrate how a data point or set of data points changes over time, revealing trends over a specified period. Contrarily, bar charts are used to compare quantities among different groups, and scatterplots are ideal for displaying and analyzing the relationship between two continuous variables.
In the context of Applied Behavior Analysis (ABA), the most commonly used type of graph is the line graph. This is due to the line graph's effectiveness in showing changes in behavior over time and its sensitivity to detecting trends and patterns related to interventions and progress.
Among the three types of graphs mentioned in the question - A. Bar Chart, B. Line Graph, and C. Scatterplot, the most common type of graph in ABA is the B. Line Graph.