Conclusions: The Value of Deaf Children as a Natural Experiment for Understanding IQ Differences between Groups

  • Jeffery P. Braden
Part of the Perspectives on Individual Differences book series (PIDF)


Deafness is a natural experiment condition that can offer much to the study of IQ differences between groups. Research regarding the causes of IQ differences between groups has been plagued by confounds of environment and genotype since its inception. As I have argued in this book and elsewhere (Braden, 1988), the study of intelligence in deaf people offers a fresh perspective to address the question of why groups have different distributions of IQ. However, the research regarding deaf people is by no means free from problems and controversies associated with studies of between-group differences in IQ, and so it is worthwhile to review the strengths and limitations of this line of inquiry.


Hearing Loss Natural Experiment Deaf Child Deaf People Verbal Intelligence 
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Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • Jeffery P. Braden
    • 1
  1. 1.University of WisconsinMadisonUSA

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