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.

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Name: ____________________   Date: ____________

1.Easy

Data that are categories with no order, such as eye colour, are at which level of measurement?

  1. ANominal
  2. BRatio
  3. COrdinal
  4. DInterval
2.Easy

A double-blind procedure means that:

  1. AParticipants are tested twice
  2. BParticipants cannot see the materials
  3. CTwo independent researchers analyse the same data set and then compare their conclusions
  4. DNeither participants nor the researchers collecting data know who is in which condition
3.Easy

On a questionnaire, an item like "Strongly agree, Agree, Neutral, Disagree, Strongly disagree" is called a:

  1. ARating of reaction time
  2. BSemantic differential
  3. COpen question
  4. DLikert scale
4.Medium

Internal validity refers to:

  1. AWhether a test gives the same results over time
  2. BWhether the findings generalise beyond the study to other populations, settings and times
  3. CWhether the observed effect was really caused by the IV rather than other factors
  4. DWhether participants found the study interesting
5.Medium

The standard error of the mean becomes smaller when:

  1. AThe mean increases
  2. BThe sample size increases
  3. CThe sample size decreases
  4. DThe variable is measured at ordinal level
6.Medium

The same 25 participants complete a memory test before and after caffeine. The scores are interval and roughly normal. Which test is appropriate?

  1. APaired (related) samples t-test
  2. BIndependent samples t-test
  3. CChi-square test
  4. DMann–Whitney U test
7.Hard

A psychology department recruits participants only from introductory psychology courses. Critics say samples are "WEIRD". What does this refer to?

  1. ASamples recruited using weighted random methods
  2. BSamples that withdraw early from studies
  3. CSamples that are unusually strange in their behaviour
  4. DWestern, Educated, Industrialised, Rich and Democratic samples that may not generalise
8.Hard

Increasing the sample size in a study most directly:

  1. AGuarantees a statistically significant result if any effect exists
  2. BRemoves all bias from the sample
  3. CIncreases statistical power to detect a real effect
  4. DIncreases the effect size

Answer key

  1. 1. A · Nominal
  2. 2. D · Neither participants nor the researchers collecting data know who is in which condition
  3. 3. D · Likert scale
  4. 4. C · Whether the observed effect was really caused by the IV rather than other factors
  5. 5. B · The sample size increases
  6. 6. A · Paired (related) samples t-test
  7. 7. D · Western, Educated, Industrialised, Rich and Democratic samples that may not generalise
  8. 8. C · Increases statistical power to detect a real effect

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