Research methods in psychology worksheet with answers

Free printable Research methods in psychology worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy

Which measure of spread is the difference between the highest and lowest scores?

  1. AThe variance
  2. BThe standard deviation
  3. CThe interquartile range
  4. DThe range
2.Easy

A Type II error occurs when a researcher:

  1. AFails to reject a null hypothesis that is actually false
  2. BRejects a null hypothesis that is actually true, finding an effect that is not there
  3. CMeasures the wrong dependent variable
  4. DUses the wrong statistical test
3.Easy

Social desirability bias in questionnaires means that respondents:

  1. AChoose answers at random
  2. BAlways agree with every statement
  3. CRefuse to answer sensitive questions
  4. DAnswer in ways that make them look good
4.Medium

Which test compares two independent groups when the data are ordinal or clearly not normal?

  1. AWilcoxon signed-rank test
  2. BMann–Whitney U test
  3. CChi-square test
  4. DIndependent samples t-test
5.Medium

A p-value of 0.03 means:

  1. AThe result will replicate 97% of the time
  2. BIf the null hypothesis were true, data this extreme would occur about 3% of the time
  3. CThe effect is large
  4. DGiven the observed data, there is only a 3% probability that the null hypothesis is true
6.Medium

In a perfectly normal distribution:

  1. AThe mean, median and mode are equal
  2. BMost scores lie in the tails
  3. CThe mode is the lowest score
  4. DThe mean is always larger than the median
7.Hard

A 2 × 3 factorial ANOVA shows that a drug improves memory in young adults but not in older adults. What has been found?

  1. AAn interaction between drug and age
  2. BA Type I error
  3. COnly a main effect of age
  4. DA floor effect
8.Hard

A study reports t(28) = 2.50, p = .018 for two independent groups of equal size. How many participants took part?

  1. A56
  2. B29
  3. C30
  4. D28

Answer key

  1. 1. D · The range
  2. 2. A · Fails to reject a null hypothesis that is actually false
  3. 3. D · Answer in ways that make them look good
  4. 4. B · Mann–Whitney U test
  5. 5. B · If the null hypothesis were true, data this extreme would occur about 3% of the time
  6. 6. A · The mean, median and mode are equal
  7. 7. A · An interaction between drug and age
  8. 8. C · 30

Full step-by-step solutions: practise this topic on examproblems.com.