A cognitive psychologist investigated the impact of articulatory suppression on the capacity of working memory. Ten participants were asked to recall list items under two experimental conditions: 'Silent' (recalling a list of written words in silence) and 'Articulatory Suppression' (recalling the words while continuously repeating the word "the" aloud). The number of words correctly recalled by each participant under both conditions is shown in the table below.
Table 1: Number of words recalled under Silent and Articulatory Suppression conditions
| Participant | Silent Condition | Articulatory Suppression Condition |
|---|---|---|
| Participant 1 | 9 | 5 |
| Participant 2 | 8 | 3 |
| Participant 3 | 10 | 7 |
| Participant 4 | 7 | 4 |
| Participant 5 | 8 | 6 |
| Participant 6 | 9 | 2 |
| Participant 7 | 8 | 8 |
| Participant 8 | 10 | 5 |
| Participant 9 | 7 | 6 |
| Participant 10 | 9 | 4 |
| Mean | 8.5 | 5.0 |
Calculate the standard deviation for the 'Articulatory Suppression' condition. Show your working and give your answer to two significant figures.
186 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.