Revista de Psicología del Trabajo y de las Organizaciones Revista de Psicología del Trabajo y de las Organizaciones
Journal of Work and Organizational Psychology 33 (2017) 109-14 - Vol. 33 Num.2 DOI: 10.1016/j.rpto.2017.02.004
Psychometric properties of the Portuguese version of the Global Transformational Leadership (GTL) scale
Propiedades psicométricas de la versión portuguesa de la escala Global Transformational Leadership (GTL)
Patrícia van Beverena,, , Isabel Dórdio Dimasb, Paulo Renato Lourençoa,c, Teresa Rebeloa,c
a Faculty of Psychology and Education Sciences, University of Coimbra, Portugal
b GOVCOPP/ESTGA, University of Aveiro, Portugal
c IPCDHS, University of Coimbra, Portugal
Received 03 February 2016, Accepted 10 February 2017

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.


El objetivo de este estudio fue adaptar y, consecuentemente, validar al portugués la escala Global Transformational Leadership (GTL). La escala se aplicó a una muestra de 456 miembros de 70 grupos de trabajo, pertenecientes a 26 organizaciones. La estructura factorial fue analizada mediante el análisis factorial exploratorio (AFE) y el análisis factorial confirmatorio (AFC), después de dividir la muestra en dos partes iguales: la AFE se aplicó en las dos muestras y la CFA en la segunda muestra. La consistencia interna se evaluó mediante el alfa de Cronbach y la validez nomológica se analizó mediante las correlaciones de GTL con la autonomía del grupo y la calidad de la experiencia del grupo. Los resultados revelaron la presencia de una escala unidimensional com un buen nivel de consistencia interna. Los datos sobre la validez nomológica confirmaron las relaciones previstas, habiendo presentado la GTL correlaciones positivas con las variables consideradas. La version portuguesa de la GTL se presenta como una herramienta útil para evaluar el liderazgo transformacional.

Transformational leadership, Psychometric qualities, Exploratory factor analysis, Confirmatory factor analysis
Palabras clave
Liderazgo transformacional, Propiedades psicométricas, Análisis factorial exploratorio, Análisis factorial confirmatorio
Journal of Work and Organizational Psychology 33 (2017) 109-14 - Vol. 33 Num.2 DOI: 10.1016/j.rpto.2017.02.004
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