Case study a descriptive research strategy in which one person is studied in great depth Control condition the condition of an experiment that contrasts with the experimental condition and serves as a comparison for evaluating the effect of the treatment. Correlation a statistical measure that indicates the extent to which two factors vary together and thus how well one factor can be predicted from the other. Correlations can be positive or negative. Critical thinking thinking that does not blindly accept arguments and conclusions. Rather, it examines assumptions, discerns hidden values, evaluates evidence, and assesses conclusions. Culture the enduring behaviors, ideas, attitudes, and traditions shared by a large group of people and transmitted from one