All of the following are characteristics of infant intelligence tests except
a. scores vary from one testing time to another
b. scores are poor at predicting later performance on traditional intelligence tests
c. they are relatively unaffected by infants' states of arousal because test administrators work with infants to elicit their best performance
d. items measure perceptual and motor development, which are not usually included in tests designed for older children and adults
C
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If an independent-groups t test has 13 subjects in each group, then the degrees of freedom are:
a. 26. b. 24. c. 13. d. 12.
Which statement about strokes is accurate? a. Survivors can never recover
b. Survivors generally require short-term care. c. Strokes are a significant cause of disability. d. Most strokes occur in individuals younger than 50 years of age.