Subject loss (attrition) poses a problem for a random groups design because
A. extraneous variables are more likely to affect subjects who drop out.
B. group equivalence established at the beginning of the experiment may be lost.
C. participants may respond to demand characteristics.
D. participants may change their natural group designation.
B. group equivalence established at the beginning of the experiment may be lost.
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If a child is born with alcohol-related abnormalities, which of the following would not be a safe assumption?
a. The mother ingested alcohol sometime during the pregnancy. b. Alcohol can be passed from the mother to the developing child. c. That the placenta was unable to keep the alcohol from being passed to the child. d. The child will suffer from intellectual disability later in life.
Researchers have had trouble replicating studies that found a particular gene linked to schizophrenia. According to one recent hypothesis, ____.
A. genes in fact have nothing to do with schizophrenia B. the same genes responsible for schizophrenia also produce Huntington's disease C. spontaneous mutations in any of hundreds of genes can cause schizophrenia D. most genetic researchers fail to examine the X and Y chromosomes
In Pavlov's classic experiments, salivation to a metronome is an example of a(n) a. conditioned stimulus
b. conditioned response. c. unconditioned stimulus. d. unconditioned response.
If you conclude that the participants in a study are a representative sample, then you can __________ from the research sample to the larger population
a. replicate c. generalize b. speculate d. conclude