Research methods in psychology worksheet with answers

In research ethics, debriefing means:

1. AAsking participants for informed consent before the study begins and explaining the procedure
2. BRemoving names from the data
3. CExplaining the true aims of the study to participants after they take part
4. DPaying participants for their time

Which measure of central tendency is most affected by extreme values?

1. AThe mean
2. BAll are equally affected
3. CThe median
4. DThe mode

The null hypothesis usually states that:

1. AThe sample is biased
2. BThe results are significant
3. CThe researcher's prediction is correct
4. DThere is no effect or no difference

A p-value of 0.03 means:

1. AThe effect is large
2. BGiven the observed data, there is only a 3% probability that the null hypothesis is true
3. CIf the null hypothesis were true, data this extreme would occur about 3% of the time
4. DThe result will replicate 97% of the time

The standard error of the mean becomes smaller when:

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

A researcher sends a questionnaire to all students and then asks respondents to recruit friends who also use a rare sleep app. Which sampling method is used for the second step?

1. ASystematic sampling
2. BStratified sampling
3. CSnowball sampling
4. DRandom sampling

In grounded theory, data collection continues until:

1. ATheoretical saturation is reached and new data add no new categories
2. BThe original hypothesis is confirmed
3. CAt least 1,000 participants have been interviewed
4. DA p-value below 0.05 is obtained

A researcher manipulates mood by showing a sad film, then asks participants to rate how sad they feel before the main task. Why is this rating included?

1. AAs a manipulation check to confirm the IV worked as intended
2. BAs the main dependent variable of the study
3. CTo debrief participants about the aims
4. DTo counterbalance the order of conditions