1. 1 IQ and Personality Assessment Psychology 631 William P. Wattles, Ph. D.

2. 2 Exam One Why is the mean or average alone not enough information to describe a distribution? The mean doesn’t tell us about the variability, that is how spread out the data are.

3. 3 Exam One Make-up Why do we need to calculate the standard deviation? It tells us about the variability, that is how spread out the data are.

4. 4 Exam Two Jen reports means for different groups in her research. Should she also report the standard deviation? If so why? Yes, It tells us about the variability, that is how spread out the data are.

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7. 7 Intelligence is a very difficult concept to define. Intellect is described as “the power of the mind to think in a logical manner and acquire knowledge”

8. 8 Wechsler Scales Sound psychometrics –Long and extensive history of continued evaluation Produce relevant information

9. 9 IQ tests Assess individual’s relative strengths and weaknesses Compare with peers

10. 10 Accuracy of Prediction One of the main assets of intelligence tests is their accuracy in predicting future behavior. Academic achievement Occupational performance Neuropsychology deficits

11. 11 Correlation with IQ Success for Managers.53 Salespersons.61 Clerks.54 For intellectually demanding jobs nearly half the variance can be explained by IQ

12. 12 Personality variables and IQ Poor scores on digit span, arithmetic and digit symbol suggest anxiety or ADHD. High on Comprehension and Picture arrangement suggests good social judgment

13. 13 Problems with IQ Does not measure fixed innate ability Does not measure all cognitive abilities Easily misused Highly personal

14. 14 Creativity WAIS-3 Emphasizes Convergent Analytical Scientific modes of thought

15. 15 Prediction Base line rates

16. 16 Predictor variable

17. 17 Probabilistic Reasoning “The Achilles’ heel of human cognition.”

18. 18 Probabilistic Reasoning “Men are taller than women” “All men are taller than all women”

19. 19 Probabilistic Reasoning A probabilistic trend means that it is more likely than not but does not always hold true.

20. 20 Probabilistic Reasoning “The Land of sometimes and perhaps”

21. 21 Probabilistic Reasoning Knowledge does not have to be certain to be useful. Individual cases cannot be predicted but trends can

22. 22 Intelligence in assessment Intelligence exists Can improve understanding It is part of the person.

23. 23 Interpreting the WAIS-III Full Scale IQ, the single most valid and reliable scale. Percentile scores or intelligence classification may be harder to misuse.

24. 24 Intelligence Classifications

25. 25 Percentile Rank examples

26. 26 Work Satisfaction –Fit between ability and job

27. 27 Compatibility in relationships

28. 28 Leisure time pursuits

29. 29 Example of behavior when person is distracted from being conscious of being watched.

30. 30 The End