Research Methods Revision 3

Which measure of central tendency is most affected by extreme scores?

• Mean

• Median

• Mode

• Range

Which measure of central tendency is not affected by extreme scores?

• Mean

• Median

• Mode

• Range

What does the range indicate in measures of dispersion?

• Highest score minus lowest score

• Average score

• Middle score

• Most frequent score

What is the usual threshold for statistical significance?

• p ≤ 0.05

• p ≤ 0.10

• p ≤ 0.01

• p ≤ 0.20

What does a Type I error involve?

• Rejecting the null hypothesis when it is true

• Accepting the null hypothesis when it is false

• Accepting the null hypothesis when it is true

• Rejecting the null hypothesis when it is false

Which test is used for nominal data?

• Chi-squared test

• Mann-Whitney U

• Spearman's Rank

• Unrelated T-test

What is the effect of a significance level that is too lenient?

• Increases the risk of Type I error

• Decreases the risk of Type I error

• Increases the risk of Type II error

• Decreases the risk of Type II error

In a negatively skewed distribution, which is true?

• Mean < Median < Mode

• Mode < Median < Mean

• Mean = Median = Mode

• Median < Mode < Mean

What is a key strength of case studies?

• They provide generalisable data.

• They are easy to replicate.

• They provide deep insights into brain function and behaviour.

• They are inexpensive to conduct.

What is a limitation of case studies?

• They are always ethical.

• They can be easily replicated.

• They may have researcher bias.

• They provide quantitative data.