Manipulation of __________ always possible in experimental research?
Correct answer: A. variables
- A. variables
- B. constants
- C. both
- D. None of these
Explanation
Manipulation of the independent variable is the defining feature that distinguishes experimental research from nonexperimental designs. Researchers do not manipulate every variable, so the wording should be understood as referring to the relevant independent variable.
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About Assessment and Evaluation
Assessment gathers evidence of learning, while evaluation uses that evidence to judge achievement, teaching or a programme. Coverage includes formative and summative assessment, diagnostic and placement tests, validity, reliability, objectivity, scoring, grading, feedback, and norm-referenced versus criterion-referenced interpretation. Measurement supplies numerical results, but evaluation involves a broader judgement.
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