- False
- Burn; Lane and Roberts; Weber; Townsend; The Kendal Project.
- True
- False
- Douglas; The national Child Development Study; Lacey; Gauntlett and Hill; Parker.
- Losing some of the original sample during the course of the study.
- They can trace developments over a period of time; they allow a detailed picture to be built up; by comparing groups over time we can identify causes.
- The weaknesses of each one can be countered by the strength of the other.