A cognitive psychologist investigated the effects of dual-task interference on working memory. Group 1 (Single-task) was asked to memorise a list of 25 abstract nouns in silence. Group 2 (Dual-task) was asked to memorise the same list of 25 abstract nouns while tapping a continuous, irregular rhythm with their non-dominant hand. The number of words correctly recalled by each participant after a 10-minute delay was recorded. The data collected is presented in the table below.
| Single-task group | Dual-task group | ||||
|---|---|---|---|---|---|
| Participant | Words recalled | Rank | Participant | Words recalled | Rank |
| A | 22 | 11 | G | 14 | 5 |
| B | 19 | 9 | H | 11 | 2 |
| C | 24 | 12 | I | 16 | 7 |
| D | 15 | 6 | J | 9 | 1 |
| E | 20 | 10 | K | 13 | 4 |
| F | 17 | 8 | L | 12 | 3 |
| n1=6n_1 = 6n1=6 | n2=6n_2 = 6n2=6 |
Explain one strength of using quantitative data in this study.
