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Marya carried out a questionnaire to investigate whether a new therapy was effective for children with autism - AQA - A-Level Psychology - Question 12 - 2019 - Paper 2
Question 12
Marya carried out a questionnaire to investigate whether a new therapy was effective for children with autism. She wanted to see if it would improve their social ski... show full transcript
Worked Solution & Example Answer:Marya carried out a questionnaire to investigate whether a new therapy was effective for children with autism - AQA - A-Level Psychology - Question 12 - 2019 - Paper 2
Step 1
Calculate the range of Condition B and complete Table 3 with your answer.
Answer
To calculate the range for Condition B, first identify the highest and lowest scores from the data:
- Highest score: 6
- Lowest score: 1
The range is calculated using the formula:
Thus,
Now, we can complete Table 3:
| Condition A | Condition B |
|---|---|
| Score on the questionnaire for those who received the new therapy | Score on the questionnaire for those who received no therapy |
| 0 | 3 |
| 1 | 2 |
| 3 | 4 |
| 0 | 5 |
| 2 | 3 |
| 0 | 2 |
| 2 | 1 |
| 1 | 5 |
| 1 | 6 |
| 0 | 4 |
Range for Condition B = 5.
Step 2
Explain why Marya used the mean rather than the mode when analysing the results of her questionnaire.
Answer
Marya used the mean as it takes into account all the scores from the social skill questionnaire for all ten participants in each group. This provides a more meaningful representation of the data, as the mean reflects the overall performance while the mode only indicates the most frequently occurring score, which may not truly represent the central tendency of the entire dataset.
Step 3
Explain one improvement Marya could make to her investigation.
Answer
One improvement Marya could make is to gather her data after a few years rather than after just six months. This would allow her to see if the new therapy had a long-term effect on the social skills of those with autism.