PubMed · 10105269
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J A Mele. 1990. Tips for personal computer security.. https://pubmed.ncbi.nlm.nih.gov/10105269/
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A Visual Basic program for generating a distribution of correlations as a tool for scale reduction is presented; the program is available free from the author and runs on IBM-compatible personal computers under the Windows 95/98/NT operating systems. The program generates a list of item combinations and correlations between the unit weighted sum of the items and a criterion score. The list can be used to locate item combinations that have high correlations with the original full-length test. An example application is presented to illustrate the use of the program. The compiled program and its source code can be downloaded from http:¿personal.bgsu.edu/stanton/r_crunch/r_crun ch.zip.
The time in which to press a key and the video retrace interval were measured under various conditions of MS-DOS, Windows 3.1, Windows 3.11, Windows 95, and Windows NT 4.0 Workstation. All the measurements were obtained with the same program running on a single Pentium 300 computer. In all, samples of 1,000 timing measurements were obtained in each of 96 different conditions. Standard deviations of the times ranged from about 0.0006 msec under DOS 6.22 to almost 40 msec under Windows 3.11, representing an increase in timing error of up to 6,000,000%. Researchers requiring millisecond timing accuracy are recommended to use DOS only.
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