Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

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.
Your email address is only used to allow you to reset your password. See 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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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

Analyze Assessment

Analyzing Test Results

Discrimination Index (DI) This assesses high-scoring and low-scoring student responses to test items. An acceptable level for this is 25%. It is calculated by considering the top percent and bottom percent of the student scores as follows: DI= a-b. a=response freq from top scoring students on an item. b= response freq from low scoring students on an item.
Point Biserial Index (PBI) or Point Biserial Correlation Coefficient This ranges from -1.00 to 1.00. Positive for the correct answer indicates that high-scoring students answered a test item correctly more frequently than low-scoring students and a negative indicates that low-scoring students answered a test item correctly more frequently than high-scoring students.
Kuder-Richardson Formula 20 (KR-20) This assesses consistency and reliability and may be used to measure interitem consistency. The ranges from -1.0 and 1.0, where reliability coefficient of 1.0 indicates perfect reliability and a reliability coefficient of 0.0 indicates that the test lacks reliability.
Created by: mariyamajames1
Popular Nursing sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards