TABLE 1.
Grade cohorts |
|||||
---|---|---|---|---|---|
Wave | Calendar year | 9th grade | 10th grade | 11th grade | 12th grade |
Base year | 1960 | Age 14 | Age 15 | Age 16 | Age 17 |
1-year follow-up | 1961 | Age 19 | |||
1962 | Age 19 | ||||
1963 | Age 19 | ||||
1964 | Age 19 | ||||
5-year follow-up | 1965 | Age 23 | |||
1966 | Age 23 | ||||
1967 | Age 23 | ||||
1968 | Age 23 | ||||
11-year follow-up | 1971 | Age 29 | |||
1972 | Age 29 | ||||
1973 | Age 29 | ||||
1974 | Age 29 |
Note: Source: The Project Talent Data Bank Handbook, Table 1.1 (Wise et al., 1979).