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Resumo
Como mensurar fenômenos que não podem ser diretamente observados? O principal objetivo desse artigo é demonstrar por que a análise fatorial é a resposta mais adequada para responder a essa pergunta. Metodologicamente, utilizamos um banco de dados com diferentes medidas de democracia para ilustrar como a técnica de análise fatorial de componentes principais pode ser utilizada para medir as duas dimensões da poliarquia propostas por Robert Dahl (1971): contestação e inclusividade. Em termos substantivos, esperamos facilitar a compreensão dessa técnica nas Ciências Sociais em geral e na Ciência Política em particular.
Abstract:
How do we measure phenomena that cannot be directly observed? The principal aim of this paper is to demonstrate why factor analysis technique is the best answer to this question. Methodologically, we use a database with different indicators of democracy to show how principal component analysis can be employed to measure the two polyarchy dimensions proposed by Robert Dahl (1971): contestation and inclusiveness. On substantive grounds, we hope to facilitate the understanding of factor analysis technique in Social Sciences in general and in Political Science in particular.
Keywords: factor analysis; democracy; polyarchy; measurement; quantitative methods
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