self-enhancement Behavior Body weight Eating Eating disorders Extraversion Hypersensitivity Interpersonal behavior Person-by-situation Interaction Personality disorders Scanning electron microscopy Situations Sociability Soziosexualität, Partnerwert, Geschlecht, Speed-Dating Weight gain actual ability algebraic difference cooperation discrepancy model emotional intelligence empathy generalized other-perception intraindividual variability narcissism perceiver effect person perception personality residual scores response styles self-perceived ability