Which of the following types of attrition is specifically a threat to the external validity of a study?

A. homogeneous
B. heterogeneous
C. homogeneous and heterogeneous
D. unequal


Ans: A

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The family's possibility of being faced with risk factors that have a negative impact on factions is referred to as

a. adaptation. b. coping style. c. adjustment. d. vulnerability.

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The research that Ainsworth conducted on attachment was done using

A. the experimental method. B. observations. C. case studies. D. correlational studies.

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Code switching is a technique children learn to use that:

a. involves the learning of several languages. b. shows they learn the vocabulary and language patterns of their parents' native language. c. helps them cope with the language patterns of different stories read to them. d. helps children deal with different social venues when they observe different adults using varying verbal and nonverbal cues.

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Identify the least appropriate Answer: Parents should select schools or programs for their children on the basis of a. a philosophy of child-rearing similar to their own

b. cost and location. c. a visit to the classroom and discussion with the director. d. using a checklist to help them observe.

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