__________ refers to accuracy or correctness in research.Internal factors question the internal validity of research,whereas external factors impugn the external validity of findings.
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Q48: Discuss the three essential steps in resolving
Q49: Time-series designs measurement of a single variable
Q50: _ refers to biological or psychological changes
Q51: The three essential steps in resolving the
Q52: _ refers to other specific events that
Q54: _ point to the tendency of pretests
Q55: A distinction is also made between multiple
Q56: _ occurs when the researcher chooses nonequivalent
Q57: _ is a false relationship that can
Q58: The problem of _ has been a
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