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Psychology Research Methods

HPS201 Assignment

Task 2

Study 1

All students study for the same exam over a two-week period (all students study for the same number of hours). Students in Group A study in the morning. Students in Group B study at night. At the end of the two-week period, all students sit the same exam (higher scores on the exam indicate better performance).

The data from this study can be found in the file Exam.omv. The variable Group indicates whether a participant was assigned to Group A or Group B. The variable ExamScore indicates the obtained exam score. The variable Age indicates the age for each participant. The variable StudentType indicates if the student is a postgraduate or undergraduate student.

Use jamovi to assist you in answering the following questions. If you justify your response based on jamovi output, refer to the relevant jamovi output in your response and provide the relevant statistical values in text (a screenshot alone is insufficient). You must only use the methods and analyses covered in the examinable content of this unit.

Study 1 - Questions

1. Conduct the appropriate t-test to test whether the mean exam score of Group A is different to the mean exam score of Group B. Attach the relevant jamovi output to your submission. Report the results of the analysis in APA format including all relevant information. (3 Marks)

2. The average exam score in the population of university students is 66. Based on the data from Study 1, Dr Dux concludes that exam scores in the present sample of participants are significantly lower than exam scores in the population of university students. Is Dr Dux correct? Justify your response, showing all steps and/or working out, and attach the relevant jamovi output to your submission. (1 Mark)

3. Based on the data from Study 1, Dr Einstein concludes that students in Group A who score above 57 on the exam are significantly older than students in Group B who score above 57 on the exam. Is Dr Einstein correct? Justify your response, showing all steps and/or working out, and attach the relevant jamovi output to your submission (2 Marks)

Study 2

Dr Brain would like to examine the effectiveness of a cognitive training program in improving memory and attention in a group of university students. In the study, a group of university students complete tasks assessing their attention and memory before and after undertaking the training program. Scores on the attention assessment range from 0 to 40. Scores on the memory assessment range from 0 to 100. Higher scores indicate higher performance on the assessments.

The data from this study can be found in the file Cognition.omv. The variables PreAttention and PostAttention indicate attention scores before and after the training program. The variables PreMemory and PostMemory indicate memory scores before and after the training program.

Study 2 – Questions

1. Dr Brain concludes that the training program is effective in improving both attention and memory in university students. Is Dr Brain correct? Justify your response, showing all steps and/or working out, and attach the relevant jamovi output to your submission. (2 Marks)

2. What would you consider to be the most appropriate interpretation of the analyses conducted (select one of the below response options)? Justify your response, showing all steps and/or working out, and attach the relevant jamovi output to your submission. (2 Marks)

A) University students would not be expected to show change in either memory or attention following the training program.

B) University students would be expected to show greater change in attention than in memory following the training program.

C) University students would be expected to show equal change in memory and attention following the training program.

D) University students would be expected to show greater change in memory than in attention following the training program.