"Let's try to figure out where clients fall on several key personality traits, rather than using a dichotomous classification system." Someone saying this would MOST likely favor which approach to classifying personality disorders?

Dr. Edwards wants to show a causal relationship between tobacco smoking and cancer. Dr. Edwards should:

a. conduct a telephone survey asking smokers about their health b. conduct an experiment using animal participants c. observe people smoking d. find correlation between smoking and the rates of cancer

_____ refers to the proportion of variance in a group of individuals that can be accounted for by genetic variance.

A) Heritability B) Phenotypic percentage of variance C) The genome D) Eugenics