Research methods in psychology worksheet with answers

In an experiment, the variable that is measured to see whether it is affected by the manipulation is the:

1. ADependent variable
2. BExtraneous variable
3. CControl variable
4. DIndependent variable

Which sampling method gives every member of the population an equal chance of being selected?

1. AOpportunity sampling
2. BSnowball sampling
3. CRandom sampling
4. DVolunteer sampling

In a matched pairs design:

1. AParticipants are randomly allocated with no matching
2. BParticipants are paired on relevant characteristics and one of each pair goes into each condition
3. CThe same participants take part in all conditions
4. DOnly twins can take part

In a positively skewed distribution, such as income:

1. AThe mean is less than the median
2. BThere are no extreme scores
3. CThe mean is greater than the median
4. DThe mean and median are always equal

A cross-sectional study compares 20-, 40- and 60-year-olds on technology use at the same time. Which problem may confound the age comparison?

1. AFloor effects
2. BPractice effects
3. CCohort effects
4. DOrder effects

A student scores 130 on a test with mean 100 and standard deviation 15. What is the z-score?

1. A3.0
2. B0.5
3. C2.0
4. D1.5

A one-way ANOVA comparing four groups is significant. What should the researcher do next to find which groups differ?

1. ARun a chi-square test on the means
2. BReport the result as a correlation
3. CRun post hoc tests such as Tukey's HSD
4. DConclude that all four groups differ from each other

A study finds that the effect of stress on illness is weaker in people with strong social support. Social support is acting as a:

1. AConfound
2. BDependent variable
3. CMediator
4. DModerator