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The Multifactor Leadership Questionnaire (MLQ) is the most widely used instrument for assessing dimensions of leadership style; yet, most studies have failed to reproduce the original MLQ factor structure. The current study evaluates the dimensionality and nomological validity of Bass's transactional and transformational leadership model using the MLQ in a sample of registered nurses working in acute care hospitals in Canada. A combination of exploratory and confirmatory factor analyses were used to evaluate the hypothetical factor structure of the MLQ consisting of five transformational factors, and three transactional factors. Results suggest that the eight-factor solution displayed best fit indices; however, two transactional factors should be extracted due to high interscale correlations and lack of differential relationships with the two leadership variables. The findings support a scale refinement and the need for new theory concerning the five transformational leadership and contingent reward dimensions of the MLQ. [ABSTRACT FROM AUTHOR]

This article describes the development and validation of a measure for transformational and transactional leadership that may be used as part of a more comprehensive instrument to measure a school’s capacity to implement school-based interventions. Data used for this study were gathered from the reports of 1144 teachers from 45 Norwegian schools who were taking on a school development intervention aimed at preventing and reducing problem behaviours among students. Using exploratory factor analysis and confirmatory factor analysis, measurement structures with two factors at the teacher level and one factor at the school level provided a good fit to the data. Although there is some overlap between transactional and transformational leadership, the two concepts do measure distinct features. Transformational and transactional leadership was eventually measured by teacher reports on two scales, each consisting of four items. As part of the validation, scores on the scales were related to other aspects relevant for organisational capacity. As expected, the transformational and transactional leadership scales both correlated significantly negatively with staff freedom and positively with innovation climate, affiliation, principal positions in schools, and collaborative activity at both the teacher and the school levels. [ABSTRACT FROM PUBLISHER]