Secondary negative symptoms of schizophrenia arise from medication and institutionalization.

Imagine that you are a psychologist who wants to determine the earliest point in human development at which an infant can demonstrate specific skills, such as the ability to judge distances or to differentiate between lines at different angles

Suggest research approaches and techniques that might be helpful in studying these questions. Note the difficulties that might be expected. What will be an ideal response

A hypothesis test is conducted after an experiment to:

a. determine whether the two groups in the study are exactly the same. b. determine how well the two groups are correlated. c. see if the groups are significantly different, as opposed to being different due to chance. d. summarize the distribution using a single score.