Mustanski et al. (2007) have conducted research on genetics and disposition and have found genetics can influence personality, sensation seeking, impulsivity, and social deviance. Since her father was clearly abusive and appeared to be a drinker as well, his impulsiveness and social deviance was evident. In looking at internal psychological states things like goals and self-efficacy beliefs are main determinants of behavior (Vancouver, More, & Yoder, 2008)

External factors influencing Jenny's personality, were her interactions socially within the environment in which she lived. Also contributing to her self-schema and how she viewed the environment was the development of knowledge structures. The different social and interpersonal experiences Jenny faced developed a self-schema that was different from those around her. Since Forrest was the only person she had that was positive in her life, her experiences drove her toward a negative self-schema. This would be the only way she might be able...
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