The factor structure and factorial validity of the social interest index

Gary K. Leak

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The present study reports (to the knowledge of the investigator) the first careful factor analysis of the Social Interest Index (SII), a measure of Adler's concept of social interest. The test item responses of 416 students from heterogeneous college classes were intercorrelated and factor analyzed. Four factors emerged which accounted for 37% of the total variance. Results are discussed in terms of the congruence between the obtained and hypothesized factors. Recommendations are made for future factorial validity research with the SII, as well as for ways to improve the structure of the scale.

Original languageEnglish (US)
Pages (from-to)585-591
Number of pages7
JournalEducational and Psychological Measurement
Issue number2
StatePublished - Jun 1982

All Science Journal Classification (ASJC) codes

  • Education
  • Developmental and Educational Psychology
  • Applied Psychology
  • Applied Mathematics


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