Centro de Investigaciones Sociológicas - CIS
Powers attributed to the CIS in accordance with article 3 of its Law and its Royal Development Decree
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Chronological list of the presidents of the Institute of Public Opinion (IOP) and the CIS since its foundation in 1963
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The main activity of the CIS for the scientific knowledge of Spanish society is its Studies
Information on how surveys are carried out at the CIS
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Provisional results of the surveys prepared by the CIS
Complete collection of studies carried out by the institution, including the questions, series, and related documentation.
Integrated extraction of microdata from a set of variables for CIS studies
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Comparative survey on the characteristics of citizenship in Spain
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Procedure for the ‘Initial Deposit Plan of R&D projects with social surveys’
Channel for reporting infringements in the field of actions of the bodies of the Center for Sociological Research
Preview of the results of study 3513 'Flash Survey on the April 28 Power Outage'
Madrid, 03 May 2025
The preliminary results of study 3513, 'Flash Survey on the April 28 Power Outage' , are presented:
- Question frequencies
- Frequencies of questions crossed by sociodemographic variables : sex, age, size of municipality and level of education.
- Frequencies of cross-referenced questions by political variables : voting recall in the 2023 general elections.
- Frequencies of questions crossed by socioeconomic variables : subjective identification of class and occupation.
- Frequencies of questions crossed by belief variables : ideology scale.
- Complete documentation in Excel : results and cross-references.
Update: The study is now available for consultation: Go to study
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