Differences were found in program usability in terms of user friendliness, data retrieval time, and license costs. This study indicates that the reliability and validity of the retrieved data are independent of the specific software program, but are dependent on the individual single-case study graphs. We focused on four different software programs that can be used for this purpose (i.e., Ungraph, DataThief, WebPlotDigitizer, and XYit), and examined the reliability of numeric coding, the validity compared with real data, and overall program usability. Little is known, however, about the coding of individual data points. Previous research has examined issues of reliability and validity of data extraction programs in the past, but typically at an aggregate level. Standard practice within SCED methods is to display data graphically, which requires subsequent users to extract the data, either manually or using data extraction programs. An important aspect of this work has been the extension of meta-analytic and other statistical innovations to SCED data. Single-case experimental designs (SCEDs) have been increasingly used in recent years to inform the development and validation of effective interventions in the behavioral sciences. Based on the application of the indicators and standards, the CRA instructional framework was determined to be an evidence-based practice for students with learning disabilities who struggle in mathematics relative to computational problems, such as addition, subtraction, and multiplication, largely with regrouping. This study sought to support the classification of the CRA instructional framework as an evidence-based approach for students with learning disabilities by applying quality indicators and standards of evidence-based practice by Cook et al. Practices are commonly suggested as evidence based, even without a best evidence synthesis on the existing research, such as the case with the concrete–representational–abstract (CRA) instructional framework to support students with disabilities in mathematics. Furthermore, some support documentation is badly needed.As researchers and practitioners have increasingly become interested in what practices are evidence based and for whom in education, different sets of quality indicators and evidence-based practice standards have emerged in the field of special education. I would suggest however (please add it to my wish list) to control the Automatic curve detection (that is tolerance, spacing, and the total number of points) directly in the main frame, and not to hide it in the references. We can only hope this nice application will not be swallowed by a bigger company, like another succesful apllication (Curvus Pro X) by the same company (Arizona). It works beautifully,and the list of points produced is easily recognized by (say) Kaleidagraph for further treatment. My first impression from this application is fantastic. Suddenly, out of the blues, here comes this masterpiece GraphClick to fill up the vacuum. I was desperately waiting for its analytic continuation into OSX, but as many others, had to face the fact that it was discontinued. Once upon a time, at those glorious days of OS9, there was a cute little application called DataThief by Kees Huyser and Jan van der Laan. Can handle arbitrarily deformed images, and two ordinate axes.Image modification for adjustment (edge detection, blur, sharpen, etc.).Frame-by-frame digitization of QuickTime movies.Most image formats recognized (GIF, TIFF, Photoshop, PDF, etc.).Automatic dectection of curves (solid, dotted or dashed), symbols, bar charts or perimeters of areas.The idea is very simple, but its usefulness is likely to become essential. You have the picture of a graph but not the corresponding data? GraphClick is then simply the best way to solve the problem! You just have to click on the graph, and the obtained coordinates of the points can be directly exported into any other application. GraphClick is a graph digitizer software which allows to automatically retrieve the original (x,y)-data from a scanned graph, a chart or a movie. Note: GraphClick is not being sold anymore and is listed only for people who had purchased it in the past.
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