This computer program (IIMA.EXE) accompanies the paper: Crawford, J. R., Garthwaite, P. H, Howell, D. C., & Venneri, A. (2003). Intra-individual measures of association in neuropsychology: Inferential methods for comparing a single case with a control or normative sample". Journal of the International Neuropsychological Society, 989-1000. (click here for 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 an intra-individual measure of association (i.e., a correlation coefficient). Examples include quantifying temporal order memory by calculating the correlation between the order material was presented and a person’s memory for that order, or quantifying an individual’s tone perception etc. The computer program is designed to allow single-case researchers or clinicians to test whether the correlation (parametric or non-parametric) obtained from a patient 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 correlation and provides a 95% confidence interval for this percentage. ( A related program singslope.exe for testing if the slope of a case's regression line differs from the slopes of controls is also available).
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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.
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