Clearly and concisely describe how a researcher could minimize the likelihood of selective subject loss in an experiment—be sure to include in your answer any risks that the researcher would be taking in trying to prevent the selective loss.
What will be an ideal response?
The researcher could use a pretest to screen out participants who would be likely to fail to complete the experiment successfully. The pretest could also be used to identify subjects in the group in which there was no subject loss who are comparable to the subjects who were lost. These comparable subjects in the no loss group could then be dropped to restore the comparability of the groups. The risk with both these procedures is a potential decrease in the generality of the findings because of testing subjects who are more homogeneous than the general population.
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a. similarity b. common fate c. closure d. proximity
The principal function of myelin is
a. to carry messages away from the soma. b. to insulate axons from each other. c. to regulate the rate at which an axon fires. d. to control the metabolism of the neuron. e. to enhance reuptake of neurotransmittes.
According to which theory of motivation are people motivated to achieve a psychological state in which their thoughts and behaviors agree?
a) learning b) biological c) hierarchy of needs d) cognitive-consistency
Two different neural pathways transmit pain messages to the brain: a fast pathway and a slow pathway. In the slow pathway,
A. information about sharp, localized pain is transmitted to the brain. B. fibers connect directly with the thalamus and then to the motor and sensory areas of the cerebral cortex. C. pain information travels through the limbic system. D. a warning system provides immediate information about an injury to the brain.