IQ Test Labs

Discover your intellectual strengths

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Psychometrics

Standardization

The test has been standardized according to the following age groups.

8-11, 12, 13, 14, 15, 16-39, 40-44, 45-49, 50-54, 55-50, over 60

The standard deviation is 15.

Each subtest has been standardized and returns a percentile score based on the entire population of test takers.

The subtests scores are reported as scores from 0-100.

Reliability

Item analysis: The Cronbach's Alpha of all items is 0.822.

No item if deleted will lead to an increase.

Factor analysis indicates the presence of a general intelligence factor.

Concurrent validity

Questionnaire feedback has been used to establish correlations with other standardized tests of intelligence, achievement and aptitude.

The Pearson correlation coefficient r is reported for each test.

  • Mensa 0.51
  • Ravens 0.42
  • ACT 0.443
  • ASVAB Armed Services Vocational Aptitude Battery 0.69
  • Stanford Binet 0.363
  • Wechsler Scales (WAIS & WISC combined) 0.32

Feedback from the questionnaire shows a clear relationship between education levels, occupational status and test scores in the following order.

Occupation

  1. Technical
  2. Professional
  3. Senior management
  4. Other management
  5. Student
  6. Other employed
  7. Administrative
  8. Full-time parent
  9. Sales
  10. Unemployed

Education level

  1. PHD
  2. Masters degree
  3. College graduate
  4. High school
  5. No formal education