A researcher is testing whether caffeine makes people more talkative. Some of his study participants are given regular coffee to drink and some are given warm milk
His assistant then interviews the participants and counts the number of words each speaks during the interview. What seems to be missing from the design?
a. a hypothesis
b. a placebo control
c. a dependent variable
d. an independent variable
Answer: b. a placebo control
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People tend to recall the events in a script more accurately if
a. they have not personally experienced the events described in the script. b. the script is first generalized into a schema. c. the script is identified at the beginning of the description. d. the script is not a prototype.
The doctrine of specific nerve energies states that:
a. each type of sensory receptor releases a different type of energy. b. different sensory nerves release different neurotransmitters. c. each sensory neuron can respond to all sensory modalities. d. what a person experiences depends on which nerve was stimulated.