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