A Comparative Study of Intelligence in Children of Consanguineous and Non-consanguineous Marriages and its Relationship with Holland’s Personality Types in High School Students of Tehran


  • Ali Navidian
  • Ebrahim Ebrahimitabas
  • Nasser Yousefi
  • Azizollah Arbabisarjou




Consanguineous and nonconsanguineous marriages, intelligence, personality type, high school students


Introduction: The present research aims to study and compare intelligence in children of consanguineous and non-consanguineous marriages and its relation with Holland’s personality types.
Methodology: This is a descriptive study and uses an ex-post facto design. The statistical population is comprised of all high school students of Tehran province in the school year 2010-2011. The sample size includes 1,221 students, 628 of whom are children of consanguineous marriages and 593 are children of non-consanguineous marriages. The researchers employed Raven’s Progressive Matrices Test and Holland Code (RIASEC) Test for data collection.
Findings: T-test results indicate that there is no signifiant difference in intelligence between children of consanguineous marriages and those of non-consanguineous marriages. However, descriptive data indicate that the mean IQ in children of consanguineous marriages is one unit lower than those of non-consanguineous marriages. Also, the results of variance analysis reveal that the difference in intelligence between different personality types is signifiant. Tukey’s post hoc test results indicate that students with an investigative personality type have a higher intelligence compared with those with other personality types.

Author Biography

Ali Navidian

Pregnancy Health Research Center, Zahedan University of Medical Sciences, Zahedan, IR Iran.






Psychiatry & Mental Health

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