Longitudinal Design
1945 BIRTH COHORT
AGE |
10 |
20 |
30 |
40 |
50 |
| TIME of TEST |
1955 |
1965 |
1975 |
1985 |
1995 |
Advantages
Assesses Continuity of Change
Generates Individual Growth Curves
Can Investigate Cause & Effect
Disadvantages
Expensive in Time & Money
Loss of Subjects and Investigator
Progressive Bias of Good Subject
Return to Outline