Abstract
In order to consider possible contributions of developmental psychology to the analysis and solution of practical problems a model of practical action is proposed comprising the following six steps or questions: (1) What is the phenomenon or the problem we have to deal with? (2) How did the phenomenon or problem come into existence? (3) What will be the outcome of further development if no action is taken to change the phenomenon or outcome. (4) What are possible goals for intervention? (5) How can the goals be achieved? (6) What is the outcome in terms of evaluation of prognosis, intervention or counselling?
Within the framework of these six steps or questions available scientific knowledge as well as relevant methodological problems are discussed.
Moreover, the relationships and differences between theory, basic research, applied research and practical application are analyzed, namely the problem of equivalence of concepts and measures, the problem of deduction of technologies from theory, the problem of falsification of theory by failures in its practical application and the problem of discrepancies in metatheoretical correspondence.
The article closes with some recommendations concerning developmental research in relation to applications.
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