Abstract

BEVEREN, Patrícia van; DIMAS, Isabel Dórdio; LOURENCO, Paulo Renato  and  REBELO, Teresa. Psychometric properties of the Portuguese version of the Global Transformational Leadership (GTL) scale. Rev. psicol. trab. organ. [online]. 2017, vol.33, n.2, pp.109-114.  Epub May 31, 2021. ISSN 2174-0534.  https://dx.doi.org/10.1016/j.rpto.2017.02.004.

The aim of this study is to adapt and consequently validate the Global Transformational Leadership measuring scale (GTL). The scale was therefore applied to a sample of 456 members of 70 work groups, belonging to 26 organizations. The factorial structure of the scale was analysed through the exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), with the sample being split in two equal parts: EFA was conducted in both sub-samples and CFA was applied in the second sub-sample. The internal consistency was evaluated via Cronbach's alpha and the nomological validity was analysed via the evaluation of the GTL's correlations with both team-level autonomy and quality of group experience. The results revealed the presence of a unidimensional scale with a good level of internal consistency. Regarding the nomological validity, the results pointed to hypothetical relations, since the GTL showed positive correlations with the variables considered. Thus, the Portuguese version of the GTL is presented as a useful instrument for evaluating transformational leadership.

Keywords : Transformational leadership; Psychometric qualities; Exploratory factor analysis; Confirmatory factor analysis.

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