Children first learn concepts through positive and negative instances, while adults often acquire concepts by learning or forming conceptual rules

Dr Vendort has examined the activation of a certain brain region located in the

parietal cortex. As indicated using fMRI imaging techniques, this region of the brain activates each and every time a person is asked to draw a picture. Dr Vendort concludes that this region of the brain is the location for artistic ability. In a subsequent study conducted using participants who have suffered brain damage to the same region of the parietal cortex, as previously mentioned, participants were still able to draw pictures of a variety of objects. Which of the following can be said about Dr Vendort's experiment? A) It is valid, but lacks reliability B) It indicates validity and reliability C) It indicates neither validity nor reliability D) It indicates reliability, but not validity

Why do researchers use operational definitions of their terms?

a. An operational definition enables researchers to measure something b. An operational definition provides a scientific explanation of something. c. An operational definition explains the term to the average person. d. An operational definition explains the practical importance of something.