Holding a variable constant is a technique for removing one threat to ____ but it can limit the ____ of an experiment
a. internal validity; external validity
b. external validity; internal validity
c. internal validity; reliability
d. external validity; reliability
a
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The ____ sends simple visual sensations to the ____, which add(s) meaning to the sensations.
A. retina; lens B. primary visual cortex; association areas C. optic nerve; optic chiasm D. rods; cones
You buy a new car that always starts instantly on cold mornings (continuous reinforcement). It suddenly fails one time, and you immediately call a service station. Suppose, however, that your car often gives you trouble on cold mornings (variable reinforcement). It is likely that you will try to start the car several times before calling a service station due to the ____ effect.?
a. ?partial reinforcement b. ?successive approximation c. ?secondary reinforcement d. ?delayed reinforcement
Mario found a +0.80 correlation coefficient between temperature and ice cream consumption. He was able to conclude:
a. Higher temperatures make people eat more ice cream. b. Eating ice cream makes people hot. c. There is a strong relationship between temperature and ice cream consumption. d. There is a weak relationship between temperature and ice cream prices.
Which of the following environmental stressors appears to be a significant factor in the later development of major neurocognitive disorder (including the Alzheimer's disease)?
A. Smoking B. Low blood pressure C. Head trauma D. Exposure to high levels of aluminum