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The applicability of 5 conventional guidelines for construct measurement is critically examined: (a) Construct indicators should be internally consistent for valid measures, (b) there are optimal magnitudes of correlations between items, (c) the validity of measures depends on the adequacy with which a specified domain is sampled, (d) within-construct(More)
Snyder's (1974) Self-Monitoring Scale exhibits a stable factor structure that does not correspond to the five-component theoretical structure he presents. Sets of face-valid items that better approximate the theoretical structure are described. Correlations between these sets of items and measures of other constructs reveal that four of the five components(More)
This report examines the reliability, validity and responsiveness of a revised scoring system for the Liverpool Seizure Severity Scale (LSSS). The revised scoring system was validated using archival data from an observational study and a randomized controlled study. Factor analyses confirmed that a single dimension captured how patients evaluate the(More)
Although the construct of self-monitoring has assumed a central role in the description and explanation of human social behavior, there is considerable disagreement about the performance of the Self-Monitoring Scale, the primary instrument for measuring individual differences in self-monitoring. The scale was originally designed to tap into a single source(More)
Self-monitoring and sex are examined as likely moderators of some of the known effective predictors of self-reported use of marijuana and alcohol. The theory of self-monitoring implies that in comparisons between low and high self-monitors, dispositional predictors account for more of the variance in reported use among low self-monitors and environmental(More)
This paper examines the need, feasibility, and validity of combining two biometric (urine and saliva) and three self-report (recency, peak quantity, and frequency) measures of substance use for marijuana, cocaine, opioids, and other substances (including alcohol and other drugs). Using data from 337 adults with substance dependence, we used structural(More)
BACKGROUND The Dermatology Quality Life Index (DLQI) has seen widespread use as a health-related quality of life measure for a variety of dermatological diseases. The purpose of this study was to estimate the minimal important difference (MID) on the DLQI for patients with chronic idiopathic urticaria (CIU). METHODS Data from 2 Phase III clinical trials(More)
A recently published article by the Scientific Advisory Committee of the Medical Outcomes Trust presents guidelines for selecting and evaluating health status and health-related quality of life measures used in health outcomes research. In their article, they propose a number of validation and performance criteria with which to evaluate such self-report(More)
Major depressive disorder (MDD) is associated with significant functional impairment. This post-hoc analysis of data from two randomized trials assessed the impact of response status on functioning in MDD. Patients with at least one historical treatment failure followed by an inadequate response after 8 weeks of prospective open-label treatment with(More)