Central tendency is what type of statistic?
A. inferential
B. descriptive
C. bivariate
D. covariate
Answer: B
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Our eyes don't adapt completely to a repeated visual stimulus because ________
a) eye movements called microsaccades cause the stimulus image to vibrate slightly on the retina b) the optic chiasm enables fibers to carry messages to all parts of the brain c) ganglion cells fire continuously d) visual acuity is greatest in the fovea
In the comparison study of parents of naturally conceived or adopted children with parents of children conceivedthrough assisted reproduction, the parents who used assisted reproduction
A. showed less warmth to their children than the other parents. B. showed more warmth to their children than the other parents. C. showed higher stress than the other parents. D. showed lower levels of interaction with their children.
A memory-boosting pill is being tested to see if it is effective. Thirty college students are randomly assigned to three groups. Group A includes 10 students who receive one of the memory-boosting pills, Group B includes 10 students who receive a placebo, and Group C receives two memory-boosting pills. Students are instructed to take the pill(s) every morning when they wake up for a month, after which they take a memory test. What test would be most appropriate to determine whether the pill was effective?
a. One-way, between-groups ANOVA b. Independent-samples t-test c. Correlation d. Linear regression
One criticism of Piaget’s work is that
a. he overstressed language development. b. his research inspired very few follow-up studies. c. his emphasis on variations in cognitive abilities among infants made him miss other features of development. d. he underestimated the cognitive abilities of young infants.