How can the INSTRUMENTATION used in a research study affect internal validity? O a. It can reduce internal validity if the instrument is highly reliable
How can the INSTRUMENTATION used in a research study affect internal validity? O a. It can reduce internal validity if the instrument is highly reliable and valid. O b. It can improve internal validity if the researcher is highly skilled in its' usage. O c. Properly calibrating the instrument may slightly reduce internal validity. O d. Instrumentation plays no role in the internal validity of a study
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