1. How can one measure intelligence?
Producing a good intelligence test
Individual and group intelligence tests
The nature of intelligence
The measurement of intelligence
Psychometrics

2. Test: “...a standardized instrument, consisting of items, for obtaining a reliable sample of some valid aspect of a person’s behavior (e.g. thinking and reasoning abilities).”

3. Test-retest reliability
Alternate-forms reliability
Split-half reliability
Inter-rater reliability
Criterion validity
Content validity
Construct validity

4. Hypothetical item analysis for a particular multiple-choice question
Students with different overall performance
Proportion getting item correct

5. Hypothetical item analysis for a particular IQ test question1
0.9
0.8
0.7
0.6
Proportion getting item correct
0.5
0.4
0.3
0.2
0.1 5 6 7 8 9
Age

6. The Stanford-Binet version of IQ:
The WAIS version of IQ:

7. Standardized scoring of the WAIS IQ tests:
(Assumption of normal distribution of IQ scores)
Mean = 100
+1.00
-1.00 Z
Standard Deviation = 15 IQ 70
100
130
-2.00
+2.00

8. Correlation Matrix of Five Subtests of an IQ Test1 2 3 4 5 6 1 2 3 4 5 6
.39
.30
.62
.35
.40
.59
.45
.41
.55
.64
.28
.63
.34
.60
.38