Study Harder (1969): study US 1969
- Public
 - Married females, USA, 196?
 - Sample
 - Respondents
 - N = 62
 - Non Response
 - -
 - Assessment
 - 
        Multiple assesment methods                    
Expert ratings, structured interview, and structured questionnaire 
Correlate
- Authors's Label
 - Tranquility (vs anxiety)
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - Wessman & Ricks Tranquility vs Anxiety Scale scored at the end of each day for lowest, average and highest mood experienced that day during 3 weeks (see above under WESSM 1966/1).
 
Observed Relation with Happiness
Daily highest: r = +.77 (01)
Daily average: r = +.92 (01)
Daily lowest : r = +.79 (01)