Research methods in psychology worksheet with answers

Reliability refers to:

1. AThe consistency of a measure
2. BWhether a measure tests what it claims to
3. CWhether results apply to other settings
4. DWhether participants gave consent

Ranking runners as first, second and third produces which level of data?

1. AOrdinal
2. BRatio
3. CNominal
4. DInterval

A study that follows the same participants over a long period of time is called:

1. AA cross-sectional study
2. BA pilot study
3. CA case study
4. DA longitudinal study

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

1. AIndependent samples t-test
2. BPaired (related) samples t-test
3. CChi-square test
4. DMann–Whitney U test

Split-half reliability involves:

1. AComparing scores on two halves of the same test to check internal consistency
2. BUsing two observers for half the sessions each
3. CSplitting the sample into an experimental and a control group and comparing their scores
4. DTesting two halves of the sample at different times

A study is preregistered. This means that:

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

Increasing the sample size in a study most directly:

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

A researcher measures the effect of noise on concentration. Participants in the noise condition happened to be tested in the morning and the quiet condition in the afternoon. What is the problem?

1. ATime of day is a confounding variable
2. BTime of day is the dependent variable
3. CThe data are at nominal level
4. DThe study has too many conditions