Dec 14, 2022
Most behavior analysts use a linear graph, meaning it has equal intervals on the horizontal and vertical axis. Ratio graphs have equal intervals on the horizontal axis but a multiple/divide axis on the vertical axis. The ratio graph permits the quantification of all behavior change features. For example, level can be quantified with different means (e.g., arithmetic, geometric) or medians. When placed on a ratio graph the metrics then can be examined with a view to ratios and multiple/divide changes as contrasted with add/subtract absolute changes. The podcast discusses the technical features of different graphs and the clinical and research functions level can have.
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Kubina, R. M., Ruiz, S., & Kostewicz, D. E. (2021). Quantifying function with the functional analysis celeration chart. Behavior Analysis in Practice, 14(3), 728-733. https://doi.org/10.1007/s40617-020-00426-x