Using visual analysis analyze the data for the following two ...

[jenna1]

Using visual analysis analyze the data for the following two graphs (a and b). Identify the design used and
  discuss the effectiveness of the intervention using visual analysis for graphs A and B. Has a functional
  relation been established in each graph? Why or why not?
 
  What will be an ideal response?

Question 2

Discuss how percent of overlap is calculated when conducting a visual analysis of
  data.
 
  What will be an ideal response?

[tuate]

Answer to Question 1

Graph A: Multiple Baseline across Students
Visual Analysis of Graph: A functional relation is established as the change in the dependent variable is established after implementation of the independent variable and replicated across tiers. All three tiers demonstrate an ascending trend with an immediacy effect.
Graph B: AB Design
Visual Analysis of Graph: Graph B does not establish experimental control as a functional relation is not established. There is an ascending trend indicating that the intervention is effective, but there is no control for confounding variables and no replication.

Answer to Question 2

Calculating percentage of overlapping data points:
1) Determine range of data point values for first condition
2) Count number of data points plotted in second condition
3) Count number of data points of second condition that fall within range of values of first condition.
4) Divide the number of data points that fall within range of first condition by total number of data points of second condition and multiply by 100.