Scottish Highers Human Biology Problem Solving: An investigation was carried out

Question

An investigation was carried out into the effect of background rock music on the ability to recall words in a list.

Students of the same age were arranged into two groups of 20. At the same time of day, each group listened to a list of 10 words being read aloud.

While the words were being read out, one group was played rock music. After the words were read out the music was stopped, and each student was asked to write down the words they had heard.

The other group was a control group.

The results are shown in the tables.

Rock music group

Position of word in list| Number of students recalling word
---|---
1 | 19
2 | 18
3 | 17
4 | 9
5 | 5
6 | 7
7 | 3
8 | 12
9 | 17
10 | 19

Control group

Position of word in list| Number of students recalling word
---|---
1 | 20
2 | 19
3 | 17
4 | 12
5 | 7
6 | 6
7 | 6
8 | 14
9 | 19
10 | 20

An investigation was carried out into the effect of background rock music on the ability to recall words in a list - Scottish Highers Human Biology - Question 12 - 2023

Worked Solution & Example Answer:An investigation was carried out into the effect of background rock music on the ability to recall words in a list - Scottish Highers Human Biology - Question 12 - 2023

State two variables, other than those described above, that would need to be controlled during this investigation.

Calculate the difference between the groups in the average number of words recalled per student.

Describe the control that was set up for this investigation.

State the conclusion that can be drawn from the results of the investigation.

Explain why there is an increase in the number of students recalling the words towards the end of the list.

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