A problem with a longitudinal design is that the results may be distorted by ____

a. cohort effects
b. participant attrition
c. differential history effects
d. assignment bias


b

Psychology

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The example given in the text of the emergence of the use of a spoon as a tool for eating illustrates which concept?

a. Motor skills become integrated into purposeful problem-solving strategies. b. Motor skills develop independently from causal relations. c. Infants are limited in their exploration of spoons by what they have observed in their home environment. d. Infants are unable to coordinate means and ends.

Psychology

Brittany was interning at a rehabilitation facility for people who had experienced brain damage in automobile accidents. She noticed that some of her patients were usually quite cheerful, in spite of their injuries. It is most likely that Brittany's cheerful patients had a. experienced damage to their right hemispheres

b. experienced damage to their left hemispheres. c. damaged both frontal lobes. d. damaged their cingulate cortices.

Psychology

Compared to most other occupational groups, police have great difficulties in ___________

A. marriage. B. finances. C. parenting. D. changing jobs.

Psychology

Craig constantly dwells on the failures in his life and continuously tries to convince himself that he will never be able to succeed at anything. Craig's behavior is characteristic of _______

a. an optimist b. a pessimist c. a narcissist d. an opponent

Psychology