[A differential view and validation of the life-satisfaction construct: an analysis of proven procedures and recommendations for a methodologically based approach in measuring the dimensions of this construct].

A combined factor analysis of 2 life satisfaction scales (Wiendieck: LSI, Lawton: PGC) and a somatic symptoms checklist (Lauter: Beschwerdeliste) resulted in 7 factors. Five of them replicate relatively reliable and valid dimensions, which have been described separately in several publications. The dimensions can be termed: (1) "Social Integration/Loneliness", (2) "Satisfaction with Life in Old Age", (3) "Subjective Somatic Symptoms", (4) "Tranquility/Insecurity, Concern", (5) "Retrospective Congruence". The consolidating element of this study is to compose proved dimensions into a broader multidimensional construct of life satisfaction. Aiming at standardisation in this field, we propose a relatively short and simply analysable questionnaire, measuring these dimensions. Besides this we give hints for experimental design and control of confounding effects.