Dr Aris was interested in whether there was a difference in working memory performance between participants using two different cognitive training techniques.
Dr Aris recruited a group of participants to use Method Alpha (Group A) and another group of participants to use Method Beta (Group B). To measure working memory capacity, he asked each participant to complete a complex span task and recorded the number of successfully recalled sequences (out of a maximum of 20).
The results of Dr Aris's investigation are shown in Table 1 below.
Calculate the mean number of successfully recalled sequences for the Method Beta participants.
| Group A: Method Alpha | Number of successfully recalled sequences | Group B: Method Beta | Number of successfully recalled sequences |
|---|---|---|---|
| P101 | 9 | P201 | 11 |
| P102 | 7 | P202 | 14 |
| P103 | 11 | P203 | 8 |
| P104 | 8 | P204 | 13 |
| P105 | 10 | P205 | 15 |
| P106 | 6 | P206 | 9 |
| P107 | 12 | P207 | 16 |
| P108 | 9 | P208 | 10 |
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.