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Psychology/Question regarding IQ tests...


So I've never taken an official IQ test, however, I've taken one I know was authored by a psychologist in a book that had 60 questions and I scored a 132 on.. The other one I took was an app that had a test claiming to be designed by a psychologist and scored a 125 on it  (117 the first time but I messed up two sections because I wasn't prepared for one and the other I didn't read the instructions thoroughly, and they had strict time limits plus I took it at 2 am).  Two reviews stated that the test was pretty close to their actual results on professional tests.  Now I understand that's not enough to establish accuracy of the test, however, my main question involves that element.  How accurate can these tests be?  Would they provide reasonable estimates given they were written by qualified psychologists who specialize in psychometric testing?

I can't answer how accurate these tests are without more information.  The authors of the tests should have done some evaluation of construct validity - which basically is, does the test measure what it claims to measure?  This is done by comparing the scores of individuals who took both the new test and an older validated test.  There should be agreement between the scores.

If the reviews are accurate, that the results are close to the results on standardized tests, then you can assume that they have provided reasonable estimates of your IQ.  Note that a score of 100 is the average, and the standard deviation on most standard IQ tests is 12 or 15.  So that means that the 7 point difference between the 125 and 132 is not significant.


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Katherine ONeill


I can answer academic questions about psychology. I am not a clinician (therapist), I am a research psychologist with expertise in biopsychology, general psychology, cognitive psychology, research methods and psychopharmacology.


I have 25 years experience as a researcher in health behavior, biopsychology and psychopharmacology.

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Ph.D. Experimental Psychology, University of Rhode Island, 1983. Post doctoral fellow dept of psychiatry, New York University Medical Center, 1983-1984. Post doctoral fellow, dept of pharmacology, University of Medicine and Dentistry of New Jersey, 1984-1985.

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