A researcher investigates whether seeing a worked example affects performance on an arithmetic task. Every correct answer is awarded one mark.
| Condition | Worked example | Task | Time allowed | Instructions | Setting | Mean score |
|---|---|---|---|---|---|---|
| X | One worked example is shown | Set P of 12 problems | 8 minutes | Printed instructions | Quiet classroom at 9 am | 9.4 out of 12 |
| Y | No worked example is shown | Set Q of 12 problems | 6 minutes | Instructions explained by the researcher | Library study area at 1 pm | 7.1 out of 12 |
The researcher concludes that seeing a worked example improves performance.
Using the information in the table, evaluate the standardisation of this procedure and whether the researcher's conclusion is justified.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.