two-and four-subtest short forms of the wechsler adult intelligence scale - revised : a comparative study with normals
abstract
the concurrent validity of wais-r short forms was
evaluated in a sample of normal subjects. the accuracy
of short form iq estimates from a standard
administration was compared with the accuracy of an iq
estimate when the short form was administered first
followed by the remaining subtests. two-subtest short
forms (vocabulary/block design; information/picture
completion) and four-subtest short forms (arithmetic/
similarities/picture completion/digit symbol;
vocabulary/block design/arithmetic/picture arrangement)
were examined. it was found that the performance of
the four-subtest short forms was comparable in both
administrative conditions. the vocabulary/block design
short form was a good estimate of full scale iq when
administered first and overestimated full scale iq when
rescored. the role of motivational factors in short
form estimates is discussed. the information/picture
completion short form had low validity. the results
support clinicians' continued caution in the use of
short forms. more research utilizing the methodology
of this study is recommended when evaluating short form
validity.
collections
- retrospective theses [1604]