achieveanovaattractionbelongingchildhoodclasscognitivedefiningdenialdevelopmentdifferentdrearlyemotionalericksonfacilitationgendergroupgrowthhealthhelpinghistoryhumanhumanistichypothesisimportanceinfantintimateintroductionlearninglecturelovementalmethodsmindpersonpetersonphilosophicalphysicalpiagetpreventionprocesspsychologyrejectionrelapserelationshipsresearchselfskillssociosocioemotionalsociologystagesstatesstatisticstermtesttestingtheoriestheorytraumaunitedvariabilityviolence