Slope Identification and Decision Making: A Comparison of Linear and Ratio Graphs. Issue 3 (May 2023)

• Record Type: Journal Article
• Authors: Kubina, Richard M.; King, Seth A.; Halkowski, Madeline; Quigley, Shawn; Kettering, Tracy
• Is Part Of: Behavior modification. Volume 47:Issue 3(2023)
• Page Start: 615
• Page End: 643
• Publication Date: 2023-05
• Subjects: trend lines -- ratio graphs -- linear graphs -- decision making -- slope identification; Behavior modification -- Periodicals; Behavior therapy -- Periodicals; 153.85
• DOI: 10.1177/01454455221130002
• Languages: English
• ISSNs: 0145-4455

Abstract

Applied behavior analysts have traditionally relied on visual analysis of graphic data displays to determine the extent of functional relations between variables and guide treatment implementation. The present study assessed the influence of graph type on behavior analysts' ( n = 51) ratings of trend magnitude, treatment decisions based on changes in trend, and their confidence in decision making. Participants examined simulated data presented on linear graphs featuring equal-interval scales as well as graphs with ratio scales (i.e., multiply/divide or logarithmic vertical axis) and numeric indicators of celeration. Standard rules for interpreting trends using each display accompanied the assessment items. Results suggested participants maintained significantly higher levels of agreement on evaluations of trend magnitude and treatment decisions and reported higher levels of confidence in making decisions when using ratio graphs. Furthermore, decision making occurred most efficiently with ratio charts and a celeration value. The findings have implications for research and practice.