Relationships between the Thurstone and Rasch approaches to item scaling
1978
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Relationships between the Thurstone and Rasch approaches to item scaling
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1978
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Abstract
When the logistic function is substituted for the
normal, Thurstone’s Case V specialization of the
law of comparative judgment for paired comparison
responses gives an identical equation for the estimation
of item scale values as does the Rasch
formulation for direct responses. The law of comparative
judgment must be modified to include a
subject parameter; but this parameter, which is
eliminated statistically with respect to the direct response
design, is eliminated experimentally in the
paired comparison design. Some comparisons and
contrasts are made between the two approaches to
item scaling, and it is shown that greater generalizability
for item scaling is possible when the
two approaches are juxtaposed appropriately.
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Andrich, David. (1978). Relationships between the Thurstone and Rasch approaches to item scaling. Applied Psychological Measurement, 2, 451-462. doi:10.1177/014662167800200319
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Andrich, David. (1978). Relationships between the Thurstone and Rasch approaches to item scaling. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/99413.
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