These are the different conditions that are part of the independent variable.
A. interaction effect
B. levels of the independent variable
C. marginal means
D. factorial designs
Answer: B
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Drug therapy to treat the symptoms of Alzheimer's disease focuses on the loss of which neurotransmitter?
A. serotonin B. dopamine C. acetylcholine D. ribonucleic acid
Improved research techniques in parapsychology have resulted in
a. the ability to replicate spectacular results. b. fewer positive results. c. less skepticism among scientists about ESP. d. fewer instances of the "decline effect.".
Research evidence suggests that
A. sleep is not necessary or helpful for memory formation. B. REM sleep, but not NREM sleep, appears to be essential for memory formation. C. NREM sleep, but not REM sleep, appears to be essential for memory formation. D. both REM and NREM appear to play important roles in memory formation.
An event that increases the probability that a response will be repeated is called _____.
A. a positive operation B. reinforcement C. an operational directive D. a discriminative stimulus