Question

1. When we conclude treatment are different than it actually is, what type of error we are committing?

Type I error

Type II error

Type III error

Type IV error

2.Generalizability is increased by increasing

External validity

Internal validity

Randomization Sampling

3. Recall bias occurs when

a. Questions asked to participants are not time limited

b. Questions asked to participants are subject limited

4. Selection bias is more common in

Case-control study and experimental study

Case control and cross sectional studies

Cross-sectional and experimental study

Cohort and Experimental studies

5. Matching is frequently done during which study:

Case-control Cross-sectional study

Cohort study Case series

6. If same individual serves as the control for themselves, then what type of study is being studied?

Case-crossover study

Experimental study

Cross-sectional study

Cohort study

Answer 1

1. Answer is option A, type 1 error. Type 1 error: incorrect rejection of a true null hypothesis. Type 2 error is the failure to reject a false null hypothesis. Type 1 is false positive and type 2 false negative.
2. Answer is option C, randomization sampling. Generalization is the extension of the research findings from a study conducted on a sample population to the larger population. A sound generalization requires a large population. The larger the population the more the results can be generalized.
3. Answer is option A, the questions asked to participants are not time limited. Recall bias is when there is difference in the way subjects remember or report exposure or outcomes.
4. Answer is option B, case control and cross sectional studies. Selection bias is a kind of error that occurs when the researcher decides who is going to be studied. Like in cases where the selection is not randomised like in cohort, case control and cross sectional studies.