ABSTRACT
This chapter discusses the importance of regularly and accurately plotting data on a line graph. Cumulative graphs have been used less frequently by applied researchers than either line graphs or bar graphs. Few examples are found in the empirical applied research literature. Cumulative graphs do, however, provide an excellent visual summary of participant progress toward goal mastery. Line graphs represent the most commonly used graphic display for presenting daily data. Solid lines represent the occurrence of instruction and exposure to incidental information. The first probe after the vertical line for each dyad represents data collected after each dyad had reached the FR10 criterion point in the grocery-bagging program. Graphic displays and tables serve two basic purposes. First, they assist in organizing data during the data collection process, which facilitates formative evaluation. Second, they provide a detailed numerical summary and description of behavior, which allows readers to analyze the relation between independent and dependent variables.
