SD Woes

[Wallace E. Dixon, Jr.]

Speaking of z-score woes, does anyone know how psychology ended up 
with standard deviations rather than mean absolute differences from 
the mean.  Is it just because of ease of calculation?

wedj

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Wallace E. Dixon, Jr.              |
Chair and Associate Professor      |     Rocket science is child's play
  of Psychology                    |     compared to understanding
Department of Psychology           |     child's play
East Tennessee State University    |       -unknown
Johnson City, TN 36714             |
(423) 439-6656                     |
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