A scale of impact for 95 life change events was
determined from a sample of 4 ethnic groups. Fifty-one
of these events fit a Rasch model and had the
same impact in all four groups (sample free item
calibration). The differences among the groups were
characterized by individual parameters called
"stabilities." A second study was performed that
estimated a linear transformation of the impacts to
yield an impact scale with ratio properties.
Wainer, Howard, Timbers, Dianne T & Hough, Richard L. (1978). Predicting the impact of simple and compound life change events. Applied Psychological Measurement, 2, 313-322. doi:10.1177/014662167800200301
Wainer, Howard; Timbers, Dianne T.; Hough, Richard L..
Predicting the impact of simple and compound life change events.
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