Research methods in psychology worksheet with answers

Which level of measurement has equal intervals and a true zero point, such as reaction time?

1. ANominal
2. BOrdinal
3. CInterval
4. DRatio

In an experiment, the control group is the group that:

1. AContains the researchers themselves
2. BIs made up of volunteers only
3. CDoes not receive the experimental treatment, providing a baseline
4. DReceives the strongest version of the treatment, to show its maximum effect

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

1. AInterval
2. BNominal
3. COrdinal
4. DRatio

A study is preregistered. This means that:

1. AThe hypotheses, methods and analysis plan are recorded publicly before data collection
2. BThe study has already been published
3. CThe results were checked and approved by a second, independent statistician before publication
4. DParticipants register their consent online

A study conducted only with American undergraduates may lack:

1. AInternal consistency
2. BInter-rater reliability
3. CPopulation validity
4. DContent validity

In a perfectly normal distribution:

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

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

1. A29
2. B30
3. C28
4. D56

In Milgram's obedience studies, participants believed they were giving real electric shocks. Which ethical issue is most directly raised, and how was it partly addressed?

1. ALack of confidentiality, addressed by publishing names
2. BDeception and potential distress, addressed by a thorough debriefing
3. CLack of a control group, addressed by randomly allocating participants to conditions
4. DUse of children, addressed by parental consent