Doctors Chase and Sanborn are conducting an experiment on the effects of caffeine on memory. Participants are randomly assigned to a caffeine or a no-caffeine group; their recall of items on a word list is later assessed. In this experiment, word recall is the ________ variable.
A. independent
B. dependent
C. control
D. subject
Answer: B
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Last year, Fiona had a yard sale. She marked the prices of items very reasonably, and she refused to reduce them when people tried to "deal.". This year, she had another yard sale, but this time, she marked the prices of items quite high, and then reduced them by 50% or more when people asked to "deal.". Fiona was surprised to find that she made much more money this year. When she asks you why
this might have happened, you explain how judgments can be affected by a. absolute thresholds. b. sensory adaptation. c. contrast effects. d. subliminal comparitors.
According to the intelligence testing of U.S. army recruits, which group scored higher on average??
a. ?Black Americans b. ?White Americans c. ?Latin American immigrants d. ?Mediterranean immigrants e. ?southern European immigrants
Which of the following statements is NOT true for neurotransmitters?
a. A neurotransmitter conveys a message to a neighboring neuron by traveling along the axon to the terminal fibers. b. Neurotransmitters are stored in synaptic vesicles. c. Neurotransmitters find their way to neuron receptor sites and subsequently trigger firing. d. When the neural impulse reaches the axon terminals, the vesicles release varying amounts of neurotransmitters.
Each spermatid develops into a ____
a. diploid sperm cell c. diploid primary spermatocyte b. haploid sperm cell d. haploid primary spermatocyte