Research methods in psychology worksheet with answers

Selecting every 10th name from a list of the population is an example of:

1. AOpportunity sampling
2. BSystematic sampling
3. CSnowball sampling
4. DStratified sampling

The right to withdraw means that participants:

1. ACan see other participants' results
2. BCan leave the study at any time and may ask for their data to be removed
3. CCan choose which condition they are in and can switch conditions at any point
4. DMust complete the study once they have started

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

1. AInterval
2. BRatio
3. CNominal
4. DOrdinal

A researcher wants to test whether there is an association between gender (male/female) and preferred film genre (four categories). Which test is appropriate?

1. APaired t-test
2. BPearson's correlation
3. CChi-square test of independence
4. DOne-way ANOVA

A 95% confidence interval for a mean of 50 is 46 to 54. What is the most accurate interpretation?

1. AThere is a 95% chance the sample mean is 50
2. BThe result is not significant
3. CThe procedure used produces intervals that contain the true mean 95% of the time
4. D95% of the individual participants in the sample scored between 46 and 54 on the measure

A study conducted only with American undergraduates may lack:

1. AInternal consistency
2. BContent validity
3. CInter-rater reliability
4. DPopulation validity

A study shows that a questionnaire correlates strongly with an established test of the same construct. This supports:

1. ATest–retest reliability
2. BFace validity
3. CConcurrent validity
4. DEcological validity

Two observers record aggressive acts in a playground and their counts correlate at r = 0.45. What should the researcher do?

1. ARefine the behaviour categories and train observers, then recheck agreement
2. BSwitch to a one-tailed hypothesis
3. CAccept the data because any positive correlation is enough
4. DUse only the higher of the two counts