Study Bachman et al. (1978): study US 1966

Public

Public highschool boys followed 8 years from grade 10, USA, 1966-74

Sample

Respondents

N = 1628

Non Response

2.8% at T1, 17.2% at T2, 21.0% at T3, 28.9% at T4, 28.5% at T5

Assessment

Multiple assesment methods
Interviews, tests and questionnaires

Correlate

Authors's Label

Concern about overpopulation

Our Classification

Operationalization

A mean of 6 items measuring respondent 's concern about overpopulation and his perception of what an ideal population size would be for the U.S. and for the world
1.00 = low
:
5.00 = high concern about overpopulation.

Assessed at T4 and T5

Observed Relation with Happiness