ABSTRACT
The author presents a study that extends the scope of the measurement framework for investigating structural properties of the WAIS subscales. Because a verbal factor is consistently reported in many of the factor analytic studies performed on the WAIS, he use it here as the focus of his convergent measurement models. The structural modeling techniques used here integrate: interbattery measurement models, patterns of age relations, selection effects, and incomplete data structures. The verbal WAIS subscales are examined individually and collectively to evaluate their measurement characteristics. Scales from the WJ-R Tests of Cognitive Abilities are used as an external reference of ability measurement to isolate components of measurement variance in the WAIS subscales. From a structural measurement standpoint, empirical measurement research on the WAIS has not culminated in a clear understanding of the number or types of abilities involved in response patterns to WAIS subscale items. Some of this measurement ambiguity may be due to the way in which the WAIS was developed.
