Gepost op: Several varieties of knowledge indicate that the scales validly reflect the standard of respondents_ lives: (1) Differences between nations in life satisfaction associated with differences in objective situations, (2) Differences between groups who reside in different circumstances, (3) Correlations with nonself-report measures of life satisfaction, (4) Genetic and physiological associations with life satisfaction, (5) Systematic patterns of change within the scales earlier than, throughout, and after important lif aan , van: