Study Baker et al. (2005): study US 1986
- Public
 - 60+ aged, USA, followed 3 years 1986-1989
 - Sample
 - Respondents
 - N = 1279
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Physical activity
 - Our Classification
 - 
            
 - 
                        
 - Remarks
 - Assessed at T1
 - Distribution
 - Range 0-9, M = 5,0, SD = 2,6
 - Operationalization
 - Self reported activities in the last year:
- gardening
- taking walks
- exercising, sports
Rated:
0 Never
1 Rarely
2 Sometimes
3 Often 
Observed Relation with Happiness
- T1 activity in voluntary associations
- T1 health
- T1 social support
- T1 religious participation
- Demographic variables
- age
- gender
- education
- race
- marital status
- Demographic variables
- age
- gender
- education
- race
- marital status
- T1 health
- T1 kind of activities
- physical activity
- social activities
- religious participation
- T1 social support
- T1 happiness (indicating CHANGE in happiness)