When a rat presses a lever, it occasionally produces a food pellet. The rat presses the lever hundreds of times, earning many food pellets. Hull and Spence would argue that lever pressing is reinforced by the:
A) expectation of the food pellet.
B) taste of the food pellet.
C) feel of the depressed lever.
D) reduction in hunger.
D) reduction in hunger.
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The deadliest school shooting occurred at _____, where 32 people were killed.
A. Columbine High School B. Los Angeles Polytechnic College C. Virginia Tech D. The Moses Lake Montessori School, Washington
Presently 75 percent of women choosing abortion agree to donate fetal tissues, which are later exchanged for "site fee" rent for laboratory space where technicians perform their dissections
Indicate whether the statement is true or false
Which of these is NOT a weakness of the cross-sectional research design?
a. Cohort effects may confound the results. b. Age effects may be present. c. Development of individual children is not reported. d. It may be difficult to recruit enough children to fill the various age groups.
Most antipsychotic drugs work by _____.
A. increasing the release of acetylcholine B. decreasing the reuptake of serotonin C. increasing the synthesis of norepinephrine D. blocking dopamine receptors