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

Internal control

Our Classification

Operationalization

A mean of items adapted from the Rotter internality scale (see Rotter, 1966)
Scale: 1.00 = low to 2.00 = high internal control. Assessed at T1, T2, T3 and T4

Observed Relation with Happiness