The Colorado Learning Attitudes about Science Survey (CLASS) is a widely used instrument designed to measure student attitudes toward physics and learning physics. Previous research revealed a fairly complex factor structure. In this study, exploratory and confirmatory factor analyses were conducted on data from an undergraduate introductory physics course (n ¼ 3844) to determine whether a more parsimonious factor structure exists. Exploratory factor analysis results indicate that many of the items from the original CLASS have poor psychometric properties and could not be used in a revised factor structure. The cross validation showed acceptable fit statistics for a three factor model found in the exploratory factor analysis. This research suggests that a more optimum measurement of students' attitudes about physics and learning physics is obtained with a 15-item instrument, which describes the factors of personal application, personal effort, and problem solving. The proposed revised version of the CLASS offers researchers the opportunity to test a shortened version of the instrument that may be able to provide information about students' attitudes in the areas of personal application of physics, personal effort in a physics course, and approaches to problem solving.

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Council for Accreditation of Counseling and Related Educational Programs Standards state that counseling students must be adequately trained in suicide assessment and intervention. To evaluate how well students or practicing counselors are prepared, there is a need to measure self-efficacy specific to the tasks required in suicide assessment and intervention. The purpose of this study was to develop and assess the validity evidence for the Counselor Suicide Assessment Efficacy Survey (CSAES), a measure of self-efficacy related to suicide assessment and intervention. CSAES was studied for use in measuring the outcomes of suicide assessment curricular and professional development. Detailed results of reliability and validity studies are reported.