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Surveys offer a method of critically testing concepts, and selecting them according to the results of tests, and the quality verification. The paper presents a study of internal consistency of the content of questionnaires, as a side of the quality. Internal consistency refers to the extent to which there is cohesiveness or inter-relatedness among the responses to the multiple items comprising the Likert scale, based on correlation and Cronbach’s alpha. The extended use of multivariate procedures is applied in the paper.