________ are the best solution to most of the criticisms of research on the relationship between viewing media violence and subsequent aggressive behavior

According to family pedigree and twin studies, a person is at greatest risk for developing schizophrenia __________

a) if he or she has an identical twin diagnosed with the disorder. b) if he or she has a nonidentical twin diagnosed with the disorder. c) if he or she has an adoptive parent diagnosed with the disorder. d) if he or she has a biological parent diagnosed with the disorder.

________ are more or less plausible ideas used to explain something (e.g., a behavior) and can be tested using research methods

a. Observations b. Hypotheses c. Variables d. Correlations