# Search Holah

# Core Studies

**Psychological Investigations**

**Correlation Questions**

**1**

A researcher has conducted a correlational study to investigate the relationship between how good people think their memory is and how well they do on a memory test. The first variable was ?self rating of memory? and was measured by asking people to rate their memory on a 10 point scale (where 1 = very poor and 10 = excellent). The second variable was ?actual memory? and this was measured by showing them a video of a minor road accident and asking them a series of 10 eye-witness questions.

Results were as follows:

1 (a) Sketch an appropriately labelled scattergraph displaying the results.

[4]

(b) Outline one conclusion that can be drawn from this scattergraph

[3]

2 Suggest one problem with the way ?self rating of memory? has been measured in this investigation.

[3]

3 Describe and evaluate two other ways in which ?actual memory? might be measured.

[10]

Total [20]

**2**

A researcher conducted a study to see if there was a correlation between the average number of hours of television watched daily and teacher ratings of aggressive play in children.

The scattergram below displays the results.

1. Outline two conclusions that can be drawn from this scattergram.

[4]

2. Suggest an appropriate null hypothesis for this correlation

[4]

3. Outline one strength and one weakness of correlational analysis.

[6]

4. (a) Suggest an alternative way that one of the variables could have been measured

[3]

(b) What effect do you think this might have on the validity of the results?

[3]

Total [20]

**3**

A researcher carried out a correlation of GCSE performance and A level performance.

1. Outline one strength of carrying out this correlation.

[4]

2. Outline one weakness of carrying out this correlation.

[4]

3. Explain what is a meant by a negative correlation.

[2]

4. Explain what is meant by a one-tailed hypothesis.

[2]

5. If the researcher found a correlation coefficient of +0.8 what does this mean?

[3]

6. Explain what is meant by a zero correlation.

[2]

7. What type of data do correlations always analyse and what is a strength of such data?

[3]

Total [20]

**4**

A researcher has conducted a correlational study to investigate the relationship between stress and health. The first co-variable was measured by asking people to rate how stressed they felt on a 10 point scale (where 1 = not at all and 10 = very). The second co-variable was measured by asking people to rate how healthy they felt on a 10 point scale (where 1 = not healthy and 10 = very healthy.

Results were as follows:

1. (a) Sketch an appropriately labelled scattergraph displaying the results.

[4]

(b) Outline one conclusion that can be drawn from this scattergraph

[3]

2. Suggest one problem with the way that health has been measured in this investigation.

[3]

3. Describe and evaluate one other way in which health might be measured.

[6]

4. Outline one strength of carrying out this correlation.

[4]

total [20]

**5**

A researcher conducted a study to investigate the relationship between students? television behaviour and studying habits. The researcher investigated whether there was a correlation between the average number of hours of television watched by A level students weekly and average number of hours weekly spent studying outside of the classroom.

The scattergraph below displays the results.

1. Outline one conclusion that can be drawn from this scattergram.

[2]

2. Suggest an appropriate one tailed hypothesis for this correlation

[3]

3. Suggest an appropriate null hypothesis for this correlation

[3]

4. If a researcher found a correlation coefficient of -0.3 what does this mean?

[3]

5. (a) Outline an alternative way of measuring one of the co-variables

[3]

(b) Explain the effect that this alternative measure might have on the results of the investigation.

[3]

6. If a researcher found a positive correlation between the number of cups of coffee drunk and the level of stress reported by a group of participants, could it be concluded that drinking coffee makes people stressed? Explain your answer.

[3]

Total [20]

**6**

A researcher has conducted a correlational study to investigate the relationship between how important a person thinks appearance is and how much they spend on clothes each month. The first variable was ?self rating of the importance of appearance? measured on a ten point scale (where 1 = not important and 10 = extremely important). The second variable was ?amount of money spent on clothes each month? measured by asking people to estimate to the nearest five pounds how much they spent in a typical month. The results are in the table below.

1. Suggest an appropriate null hypothesis for this study.

[4]

2. Sketch an appropriately labelled scattergraph displaying the results of this study.

[4]

3. Outline

**two**conclusions from the data in this scattergraph.

[4]

4. Outline

**one**strength and

**one**weakness of the way ?importance of appearance? was measured in the study.

[6]

5. Explain what is meant by a negative correlation.

[2]

Total [20]