Besides, using the values we digitized, we recalculated the 23 effect sizes presented in the original articles for validity analysis. We performed the digitization of 6.846 data points on three different computers using 15 hypothetical graphs with 20 data series and 186 graphs with 242 data series from 29 published articles to accomplish the goal. In this study, we aimed to analyze the validity and reliability of the PlotDigitizer software program, which is widely used in literature and an alternative to other data extraction programs, on computers with different operating systems. Researchers typically use data extraction software programs to extract raw data from the graphs in articles. Limitations and directions for future research are explored.Īccess to raw data of graphs presented in original articles to calculate the effect size of single-case research is a challenge for researchers conducting studies such as meta-analysis. Additionally, both programs allow for reliable extraction of data between raters and between software programs. Study findings suggest that both GraphClick and DataThief III provide valid methods of data extraction. The purpose of this study was to evaluate and compare the validity and reliability of the results yielded by each of these programs when evaluating the results of multiple research studies on the Good Behavior Game, a classroom-based intervention which has been in practice since 1969. Researchers consistently use two software programs, DataThief III and GraphClick to conduct meta-analytic work using SSEDs. Until recently, researchers wishing to undertake meta-analytic research themselves have had limited options for synthesizing the intervention effects of a collection of studies. In the realm of single-subject experimental designs (SSEDs), meta-analyses have a particular cachet: retaining the rigor of single-subject designs with the added robustness of replication to more fully determine the strength of a given approach or intervention. Researchers frequently rely on meta-analyses of prior research studies to efficiently evaluate a broad spectrum of results on a particular topic.
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