in determining the progression to psychopathology versus normative development. Some theories have branched from the diathesis-stress model, such as the differential susceptibility hypothesis, which extends the model to include a vulnerability to positive environments as well as negative environments or stress. A person could have a biological vulnerability that, when combined with a stressor, could lead to psychopathology (diathesis–stress model); but that same person with a biological vulnerability, if exposed to a particularly positive environment, could have better outcomes than a person without the vulnerability. See also Biopsychosocial model Environmental sensitivity Gene–environment interaction Heritability Human behavior genetics References External links Psychological theories Psychological stress Schizophrenia Environmental sensitivity