If the research prediction is that the treatment will decrease scores, then the critical region for a directional test will be in the left-hand tail
Indicate whether the statement is true or false
True
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Which of the following is the strongest evidence that marijuana impairs memory? a. Memory gradually improves after people stop using marijuana
b. Memory gradually deteriorates after people stop using marijuana. c. Marijuana users have lower scores on a memory test than nonusers do. d. Heavy marijuana users show more memory problems than lighter users do.
The electrical charge that exists between the inside and the outside of a neuron when the neuron is neither receiving nor sending is approximately
a. -1,000 millivolts. b. +60 to +70 millivolts. c. -60 to -70 millivolts. d. +1,000 millivolts.
When people are asked to judge why males and females have been successful on a task, they are likely to say that
a. males have been successful because of good luck, whereas females have been successful because of high ability. b. both males and females have been successful because of a combination of ability and hard work. c. males have been successful because they cheated, whereas females have been successful because the task was easy. d. males have been successful because of high ability, whereas females have been successful because they tried hard.
Which part of a normal human neuron gets twisted together to form a neurofibrillary tangle?
a. neurotransmitters b. somas c. dendrites d. axons