A researcher asks individuals to participate in an experiment that causes arm muscle strain. The participants are instructed to use a provided muscle rub after the activity
One group gets a rub with active ingredients to reduce pain, whereas the other group gets a ____________ without active ingredients.
a. placebo
b. pseudotransmitter
c. drug
d. agonist
e. ligand
Answer: a. placebo
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Which of the following is most likely to be a title for a research study in the field of positive psychology?
a) "What Causes Aggression?" b) "The Factors Underlying Schizophrenia" c) "What Makes a Marriage Work?" d) "Contributing Factors to Alcoholism"
According to Piaget, children's behavior is marked by egocentrism and a tendency to focus on one outstanding aspect of a problem and ignore all the other relevant aspects of the problem during the ______ stage
a. preoperational c. concrete-operational b. formal-operational d. sensory-motor