Evaluating Study Validity Flashcards Preview

MCM Test 1 > Evaluating Study Validity > Flashcards

Flashcards in Evaluating Study Validity Deck (12):
1

what are 3 things that can cause invalid findings?

bias, confounding, random error

2

what is internal validity?

accuracy of a conclusion that an independent variable is responsible for the variation in the dependent variable

3

what is external validity?

ability to generalize research findings to and across populations and settings

4

what is another name for bias?

systematic error

5

what does systematic error result from?

flaws in design, conduct, and analysis of a study

6

what is selection bias?

discrepancy in the selection of subjects or their likelihood of being retained
-differential treatment effects
-noncompliance
-loss to followup or non-response

7

what is one risk of selection bias in a case control study?

selection of controls that is not representative of the population that produced the cases

8

what is information bias?

bias that results from mismeasurement or systematic inaccuracies (misclassification)

9

what are two types of information bias?

recall and interviewer

10

what are some measures to take against information bias?

validate exposures, double blind, standardized training and protocols

11

what is confounding?

confounding variation is caused by variables outside of the researchers control and can distort perception of the relationship

12

what are some protections against confounding?

randomization, control groups, blinding, matching, stratified analysis