In Chapter 1 (What Is Psychology?) the Importance of Critical

Essay

In Chapter 1 (What Is Psychology?) the importance of critical thinking was noted. In particular, a critical thinker knows that once a general question is raised, the next step is to define one's terms in a clear and concrete way. Chapter 2 (How Psychologists Do Research) provided even more detail in the discussion of operational definitions. How do behavioural geneticists define the meaning of heritability? What does it mean when a trait is said to be "highly heritable"?