Study DeJong-Gierveld (1969): study NL 1965
- Public
 - 30-55 aged, general public, Amsterdam, The Netherlands, 1965
 - Sample
 - Respondents
 - N = 600
 - Non Response
 - 31%;
 - Assessment
 - 
        Interview: face-to-face                    
Structured interview and low structured questionnaire at home. 
Correlate
- Authors's Label
 - Quality of contacts with family members
 - Our Classification
 - 
            
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 - Related specification variables
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 - Operationalization
 - Score based on number of family members mentioned among 4 most important social contacts, frequency of contacts with these family members, and appreciation of these contacts.
 
Observed Relation with Happiness
Females: r = +.36
Males : r = +.00