3.1. List any three statistical or methodological procedures which can help researchers determine

if an experiment has 'worked' or not.

(3 marks)

3.2. Explain the difference between "statistical significance" and "effect size"wheninterpreting

experimentalfindings. Why is effect sizegenerallymoresignificant?

(4 marks)

3.3. Describe the subtractionmethodused in experimental analysis. What isadisadvantageof

using thismethodalonetodecideaboutthe success of an intervention?

(3 marks)

3.4. Definethe "contingency approach"usedin experimental researchand howithelps address

the complexity of educational interventions.

(3 marks)

3.5. Whyshouldethical considerations be included indecidingwhetheranexperimentin

educationhas'worked'?Provideanexample ofonepossible ethicalissueand howthis

could be addressed.

(2 marks)