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Considered desirable [20]. In addition, inter-item correlations were calculated, as to register a possible increase of the Cronbach's alphas due to the length of the questionnaire [21]. According to Clark Watson [22], a mean inter-item correlation of 0.15 ?0.20 is desirable for scales that measure broad characteristics, while values of 0.40?.50 are required for scales tapping narrower ones, whic

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