Low-level radiation, resulting from industrial leakage or medical X-rays, __________
A) is harmful only when combined with other teratogens
B) can increase the risk of childhood cancer
C) rarely causes lasting damage
D) is safe during the last trimester
Answer: B
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What general rule governs the pace of language production and language comprehension?
A. Comprehension precedes production. B. Production and comprehension develop at the same rate over time. C. Production precedes comprehension. D. No predictable link has been established between production and comprehension for a given individual.
How is attachment formation in infancy related to friendship formation?
a. Children who are securely attached look for one best friend with whom to share their feelings. b. Children who are securely attached are more popular and more comfortable in social interactions. c. Children who are anxiously attached make friends readily. d. Children who are securely attached do not need friends.
The most appropriate hypothesis test for a within-subjects design that compares three treatment conditions is a(n) ____
a. an independent-measures t test b. a repeated-measures t test c. a repeated-measures analysis of variance d. a chi-square test for independence
If criterion-related validity is .40, and the base rate is .60, the false positive rate is likely to be highest if the selection ratio is:
A. .10. B. .95. C. .50. D. This is impossible to answer based on the data provided.