When using a _____ hypothesis, the researcher predicts the direction of the expected difference between the groups
a. null
b. nondirectional
c. one-tailed
d. two-tailed
c
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The chemicals that are secreted from the terminal buttons into the synapse are
a. neurotransmitters. b. action potentials. c. antagonists. d. agonists.
Michael has decided to donate to a blood drive at his university. As the nurse prepares to insert a needle into Michael's arm, which of the following structures becomes more active in anticipation of pain?
A. Michael's intralaminar nuclei of the hypothalamus B. Michael's anterior cingulate cortex (ACC) C. Michael's posterior cingulate cortex (PCC) D. Michael's somatosensory cortex
Darwin argued that
a. emotional reactions are unrelated to states of arousal. b. people are unable to cognitively label the source of their arousal. c. some emotional expressions cross species boundaries. d. understanding an emotional experience must occur before arousal can occur. e. there is an infinite number of emotions for people throughout the world.
The expected value of F if the null hypothesis is true is ______.
A. 0 B. 1 C. 10 D. depends on the strength of the effect of the IV