Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Research 1

Principles of Validity

QuestionAnswer
The extent to which an instrument measures what it is intended to measure is? Validity
This form of validity indicates that an instrument appears to test what it is supposed to. Face Validity
This form of validity is the least vigorous, typically observable, and scientifically weak. Face Validity
This form of validity indicates that the items that make up an instrument adequately sample the universe of content that define the variable being measured. Content Validity
This validity is most useful with questionnaires and inventories. Content Validity
This form of validity is based on the ability of one test to predict results obtained on an external criterion. Criterion-related Validity
This form of validity is the most practical and objective approach to validity testing. Criterion-related Validity
_________ validity compares results to "gold standard" Criterion-related Validity
This form of validity reflects the ability of an instrument to measure an abstract concept. Construct Validity
The ability to obtain a positive test when condition is really present is know as? Sensitivity
A true positive = Sensitivity
The ability to obtain a negative test when the condition is really absent is known as? Specificity
A true negative = Specificity
What is the formula for prevalence? [(A+B)/(A+B+C+D)] X 100
What is the formula for sensitivity? [(A/(A+C))] X 100
What is the formula for specificity? [(D/(B+D))] X 100
What is the formula for positive predictive value? [(A/(A+B))] X 100
What is the formula for negative predictive value? [(D/(C+D))] X 100
Sensitivity or specificity is more important when risk associated is high? Sensitivity
Sensitivity or specificity is more important when costs or risks for further intervention are substantial? Specificity
Created by: txst fall 2008