This PC program (SINGSLOPE.EXE) accompanies the paper Crawford, J. R., & Garthwaite, P.H. (2004)" Statistical methods for single-case research in neuropsychology: Comparing the slope of a patient's regression line with those of a control sampleā€ Cortex, 40, 533-548. Click here for reprint as a pdf

In single-case studies and in clinical practice some constructs are quantified not by a conventional score (such as number of items correct) but as a measure of association.  This paper and accompanying program extends work by Crawford, Garthwaite, Howell, & Venneri (in press) (see program IIMA.EXE ) to cover situations where a patient’s performance is expressed as the slope of regression line.  Examples include quantifying a patient’s distance estimation using the slope relating actual distance to estimated distance (or time estimation using the slope relating actual elapsed time and estimated elapsed time).  The computer program is designed to allow single-case researchers or clinicians to test whether the slope of a patient’s regression line is significantly different from those of a control sample; it also provides a point estimate of the abnormality of the patients score (i.e. it estimates the percentage of the control population that would obtain a more extreme slope and provides a 95% confidence interval for this percentage).

Click here to download the program (463Kb).

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The author of this software (John R Crawford) and the University of Aberdeen make no representations about the suitability of the software or about any content or information made accessible by the software, for any purpose.

The software is provided 'as is' without express or implied warranties, including warranties of merchantability and fitness for a particular purpose or noninfringement.

The software is provided gratuitously and, accordingly, the author shall not be liable under any theory or any damages suffered by you or any user of the software.

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