______ type threat to internal validity occurs when the experimental and control groups are selected based on different criteria or when participants are assigned to groups differentially and not by random assignment.
A. Attrition
B. Differential selection
C. Maturation
D. History
Ans: B
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Which of the following is a key concept of sociocultural theory?
a. zone of proximal development b. psychosocial stages c. maturational developmental processes d. attachment
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Blinking, ______, and ______ are all examples of infant reflexes.
A. swimming; walking B. Babinski; crying C. spitting; yawning D. grasping; scratching
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The process by which states reach agreements that allow for out-of-state licenses to be accepted so long as all state fees are paid is known as
a. credentialing. b. portability. c. certification. d. cross certification.
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The “B” in Baker’s ABC guide stands for identify ________________.
Fill in the blank(s) with the appropriate word(s).
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