Paper I - Research Aptitude
Research Aptitude tests the logic of inquiry: framing a problem, selecting design and sample, operationalising variables, judging validity and ethics, and reporting evidence without distortion. It rewards candidates who can separate what a study can support from what it merely suggests.
Core rules
- Basic research builds theory; applied research solves a practical problem; action research is a practitioner-led cycle of plan, act, observe and reflect.
- The independent variable is manipulated or presumed cause; the dependent variable is the measured outcome; extraneous variables must be controlled.
- A hypothesis is testable and falsifiable; the null hypothesis states no difference or relationship. Rejecting the null does not prove the alternative true.
- Probability sampling (simple random, stratified, cluster) supports generalisation; non-probability sampling (purposive, convenience) does not.
- Reliability is consistency; validity is correctness of inference. A reliable scale can still be invalid.
- A design specifies when and from whom data are collected: cross-sectional compares at one time; longitudinal follows over time.
- Ethics require informed consent, confidentiality, no fabrication or falsification, and proper citation.
Worked example
A researcher gives two feedback conditions (detailed versus marks-only) and compares test scores. Feedback condition is independent; test score is dependent. If students in one condition also had more study time, study time is a confounding variable, so the claimed cause is weakened.
Traps that cost marks
Calling any questionnaire 'experimental'; treating 'statistically significant' as 'important'; saying a sample is random when volunteers were used; confusing reliability with validity.