stats tests

Question 1

independent measures

Answer 1

• Participants only take part in one condition of the experiment (requiring two separate
  groups).

Question 2

3 types of data

Answer 2

• Nominal: Categorical data, for example, brown eyes, green eyes, blue eyes.
• Ordinal: Ordered categories and the distances between the categories is not known e.g., a Likert
  scale where one person’s ‘1’ could be different to another person’s ‘1’.
• Interval/Ratio: Scale data, for example test scores, weight, height, temperature. There are set intervals between each point.

Question 3

repeated measures

Answer 3

• One group of participants take part in both conditions of the experiment.

Question 4

matched pairs

Answer 4

• Participants are matched in each condition for characteristics that may have an effect on
  their performance, e.g., IQ, age, previous test scores.

Question 5

Man Whitney U criteria

Answer 5

• Data that is at least ordinal.
• Looking for a difference.
• Independent measures.

Question 6

wilcoxon criteria

Answer 6

• When we have at least ordinal data.
• Looking for a difference between groups.
• A repeated measures design.

Question 7

spearman criteria

Answer 7

• Data is at least ordinal.
• When you are looking for a relationship.
• Data provides a correlation coefficient.

Question 8

chi^2 criteria

Answer 8

• When there is nominal level data.
• When you are looking for a difference.
• When you have independent measures.