Study Wessman & Ricks (1966): study US 1957 /1
- Public
 - Male college students, followed 3 years, Harvard University, USA, 1957-60
 - Sample
 - Respondents
 - N = 17
 - Non Response
 - 37%: 9 dropouts, incomplete; about the same happiness distribution.
 - Assessment
 - 
        Multiple assesment methods                    
Mood diary kept 30 days and repeated interviews and tests during three years. 
Correlate
- Authors's Label
 - Supressivity and concealment of emotions
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - Clinical rank order on the basis of general clinical experience with the subjects and observation in experimen- tal situations.