Which descriptive assessment method would be the best choice for what he wants to accomplish?

The correct answer to this question is Scatterplot recording. Scatterplot records are interval recording methods. They can be used to help discover patterns in relation to a behavioral problem and time periods. A scatterplot itself is a grid. This grid includes times plotted on a vertical line divided into time periods.

There are many advantages and disadvantages to using this method in functional assessments. On one hand, it can use a number of measurement strategies, which include duration and frequency counts. On the other and, along with using a scatter plot, additional recording methods are necessary to collect data, which causes more work.