On a fixed-ratio schedule, reinforcement is given for the ______
a. first correct response after varying amounts of time have passed
b. next correct response after a fixed number of responses have occurred
c. first correct response after a fixed amount of time has passed
d. next correct response after a varying number of responses have occurred
b
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Public health researchers attribute the decline in the death rates from cancer to __________
a) a decrease in psychological stress. b) a reduction in the number of people who smoke. c) earlier detection of cancer. d) better treatment of cancer.
Twin studies and studies of adopted children allow behavioral geneticists to research the _____
a) polygenic nature of inheritance. b) relative contributions of genes and environment. c) ways genes always win over environment. d) ways environment always wins over genes.