Factor analysis can be a valuable tool for assessing validity; however, the reliabilities of identified factors must be attended to. This study examined the impacts of item variance on factor stability and structure. The attempt was to determine empirically whether unnumbered graphic scales scored using a larger number of scale steps produce more…

Used confirmatory factor analysis to evaluate the score integrity of LibQUALl+, an instrument to measure perceptions of library service quality. Results for 60,027 graduate and undergraduate students suggest that the model implied by LibQUAL is reasonable and invariant across independent samples and fits all three major subgroups of library users.…

The present study investigated the factor structure underlying responses to a measure of psychological type, the Personal Preferences Self-Description Questionnaire (PPSDQ). Measures of psychological type have been extremely useful in various applications, including career counseling and in assessing learning styles. Subjects were 422 university…

The Administrator Professional Leadership Scale (APLS) was developed to measure the professional leadership quality of a school principal, and to provide principals with anonymous feedback on teachers' perceptions of their leadership. Further refinement was carried out to increase its reliability; to discover categories of administrator behavior…