adaptationauchangement affektivebindung anpassung aspectspsychologiques aspectssociaux attitudechange business businessdevelopment change change(psychology) changemanagement changestrategies decision-making development développementpersonnel economics leadership newyorktimesbestseller nyt:hardcover-advice=2010-03-07 organizationalchange problemsolving psychologicaladaptation self-actualization(psychology) änderung