Abstract

This paper analyzes the incidence of non-response (don´t know/no opinion) in the variable on ideological self-study raised in the surveys of the Centro de Investigaciones Sociológicas (CIS). The study seeks to find the profile of people who opt for this option of silence in the face of the dichotomous continuum between having left wing or right wing ideology. Through a statistical analysis of binary logistic regression, the work asks if behind this silence there is a majority proportion of people who have an apolitical ideology and/or they abstain in the electoral elections. A silence, moreover, that occurs more frequently among groups less favored by the world economic system: women, the elderly, workers, peasants and people with primary education.