13. Theories of Personality

Temperament refers to

Temperament is based on

Three-year-old Gunther has an easy-going nature, which is believed to be inherited from his mother, allows him to adjust to change quickly and effortlessly. Gunther appears to have a well-established

Cameron was adopted at birth, so now he is interested in studying the effects of adoption on child development. More specifically, Cameron wants to know if individual traits can be attributed more to genetics or to environmental conditions. Cameron is interested in the study of

Based on research from a variety of sources, it seems that approximately _____ of variations in personality traits are caused by environmental influences.

_____ studies how much variation in personality can be attributed to genetic factors.

Marky complains that his coworker, Johnny, is irritating because Johnny never has a nice thing to say about anyone or anything. Marky believes Johnny's problem is an enduring characteristic with which Johnny was born. In other words, Marky dislikes Johnny's