........ is the most commonly used technique for controlling for extraneous variables in nonexperimental research.
1). Matching
2). Holding extraneous variables constant
3). Statistical control
4). Static control
1. Concepts which cannot be given operational definitions are ........ concepts
2. Which type of review compares how different theories address an issue?
3. Research method is a part of ........
4. Psychology has come into existence as a separate discipline a little over
5. A research problem is feasible only when: (June-2007)
6. Third step in problem formulation is
7. A question during an interview such as ``Why do you feel that way?' is known as a
10. what is the advantage of the survey of related literature