An investigator wanted to see if bilingualism affects the speed of semantic processing. They measured the time taken (in seconds) to identify grammatical errors in a text.
The results are shown in Table 1 below.
| Monolingual speakers | Bilingual speakers | |
|---|---|---|
| Mean response time (seconds) | 2.4 | 1.8 |
State why an 'independent groups' design is suitable for this investigation.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, 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.