Many studies show that __________ are slightly ahead of __________ in early vocabulary growth
A) boys; girls
B) shy toddlers; outgoing toddlers
C) girls; boys
D) low-SES children; high-SES children
C
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What is the null hypothesis of the above example?
a. Prisoners are more aggressive than college students. b. College students are more aggressive than prisoners. c. There is no relationship between stress levels and groups. d. Prisoners and college students are not different in aggression levels.
Sol is investigating the effects of divorce on children's self-esteem. His initial sample consists of a group of 10 five-year-olds, which he plans to follow over a period of at least 15 years. When this group of children reaches age 15, Sol adds a second group of five-year-olds to his study, and plans to follow them for another 15 years. Sol's overall plan is best classified as a _____ research
design. a. correlational b. cross-sectional c. longitudinal d. sequential
The blood-brain barrier is made up of closely packed glial cells
a. True b. False Indicate whether the statement is true or false
The id uses reflexive action and wish fulfillment to
A. reduce guilt. B. satisfy the reality principle. C. satisfy the ego and superego needs. D. reduce tension.