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.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
