ExpertMedium3 marksStructured
AQA GCSE · Question 12.1 · Cognition and Behaviour
Read the following information.
A teacher carried out an experiment to investigate factors that can affect perception. She divided her class into two groups: A and B.
Group A was shown nine different pictures of rabbits.
Group B was shown nine different pictures of ducks.
Both groups were then shown an ambiguous image (Figure 1, the duck-rabbit) and were asked what animal they saw.
The results are shown in Table 1.
Table 1: The type of animal seen by participants
Animal Group A Group B Rabbit 11 2 Duck 3 13 Other 1 0
Calculate the percentage of students in Group B who saw Figure 1 as a rabbit. State your answer using two significant figures and show your workings.
Read the following information.
A teacher carried out an experiment to investigate factors that can affect perception. She divided her class into two groups: A and B.
Group A was shown nine different pictures of rabbits.
Group B was shown nine different pictures of ducks.
Both groups were then shown an ambiguous image (Figure 1, the duck-rabbit) and were asked what animal they saw.
The results are shown in Table 1.
Table 1: The type of animal seen by participants
| Animal | Group A | Group B |
|---|---|---|
| Rabbit | 11 | 2 |
| Duck | 3 | 13 |
| Other | 1 | 0 |
Calculate the percentage of students in Group B who saw Figure 1 as a rabbit. State your answer using two significant figures and show your workings.
How to approach this question
1. Find the total number of students in Group B by adding up the numbers in the 'Group B' column of the table.
2. Identify the number of students in Group B who saw a rabbit.
3. Use the formula: (Part / Whole) x 100 to calculate the percentage.
4. Round your final answer to two significant figures as requested.
Full Answer
To calculate the percentage, you first need the total number of participants in Group B. From the table, this is 2 + 13 + 0 = 15. The number of these participants who saw a rabbit is 2. The calculation for the percentage is (2 ÷ 15) × 100, which equals 13.333...%. The question asks for the answer to be given to two significant figures. The first two significant figures are 1 and 3. The next digit is 3, which is less than 5, so we do not round up. The final answer is 13%.
Common mistakes
Using the wrong total (e.g., the total for Group A, or the grand total). Forgetting to multiply by 100. Making an error in rounding to two significant figures.
Practice the full AQA GCSE Psychology Paper 1
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