The researchers in a cognitive psychology study on the effects of background auditory distraction on working memory decided to carry out a chi-squared test on their data from Table 1. They found an observed/calculated value of 3.20 for a two-tailed (non-directional) test at the 5% level of significance when df=1df=1df=1.
| Auditory Condition | Achieved High Recall | Achieved Low Recall |
|---|---|---|
| Lyrical Music (N = 40) | 16 | 24 |
| Instrumental Music (N = 40) | 24 | 16 |
| Level of significance for a one-tailed test | 0.10 | 0.05 | 0.025 | 0.01 | 0.005 |
|---|---|---|---|---|---|
| Level of significance for a two-tailed test | 0.20 | 0.10 | 0.05 | 0.02 | 0.01 |
| df = 1 | 1.64 | 2.71 | 3.84 | 5.41 | 6.64 |
Explain what this calculated value shows in terms of the recall performance of the participants in the study.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.