Genetic effects are ______.
A. constant over one's life
B. active at some times, inactive at other times
C. a constant influence if the environment selects for this
D. active in a fixed sequence
Answer: B
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Even though Joey suffered because of it—his peers at school teased him for months—he filed a report with the principal's office when he heard that two of the popular kids at school had cheated on a big exam. Joey filed the report for everyone's good. Social psychologists would say that in reporting the students, Joey engaged in ____
a. the commons dilemma b. altruistic punishment c. self-censorship d. the risky shift
Informed consent is typically obtained following a study
a. True b. False Indicate whether the statement is true or false
One difference in the nervous systems of vertebrates and invertebrates is that:
A) invertebrates have a larger cerebral cortex. B) the nervous system of vertebrates has a hierarchical structure. C) invertebrates lack a central nervous system. D) vertebrates lack a spinal column.
A ____ schedule refers to a reinforcer occurring only after an unchanging number of responses take place
a. fixed-interval c. variable-interval b. fixed-ratio d. variable-ratio