This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A test constructor is interested in determining the reliability of a certain item on a new test of ... (Read 53 times)

rmenurse

  • Hero Member
  • *****
  • Posts: 513
on: Jun 20, 2018
A test constructor is interested in determining the reliability of a
  certain item on a new test of aggressiveness, the ASAP (Aggressive Syndrome Assessment Profile). The items were scored 1 for showing aggressiveness and 0 for passivity.
 
  For each subject, the total score on the test is reported, high scores indicating higher levels of aggressiveness.
 
  Subj Item Score Total Score
   X Y
  1. 1 10
  2. 1 12
  3. 1 10
  4. 1 11
  5. 1 15
  6. 0 4
  7. 0 5
  8. 0 6
  9. 0 9
  10. 0 7
 
  Find the point-biserial reliability value for the selected item.
 
 
 What will be an ideal response?

Question 2

A researcher wishes to establish the DI (Discrimination Index) for a
  series of five items contained in a new test being developed to assess Whole
  Language Readiness (WLR).
 
  The data are as follows:
  Item Proportion Correct Proportion Correct
   For Top Third For Bottom Third
  a. .70 .60
  b. .70 .50
  c. .50 .20
  d. .95 .70
  e. .45 .50


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Sarahjh

  • Sr. Member
  • ****
  • Posts: 370
Reply #1 on: Jun 20, 2018
Answer to Question 1

rpbis = .833 Sig p<.01

Answer to Question 2

a DI=.100


rmenurse

  • Member
  • Posts: 513
Reply 2 on: Jun 20, 2018
Gracias!

daiying98

  • Member
  • Posts: 354
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Stimuli Used in a Test of Word Recognition Stimuli Used in a Test of Word Recognition
The Mantoux tuberculin skin test. Positive reaction. The Mantoux tuberculin skin test. Positive reaction.
Wet Compression Test Wet Compression Test
Control you knife with one hand and hold the item being cut with the other (1 of 3) Control you knife with one hand and hold the item being cut with the other (1 of 3)
A hypothesis test is performed to test the claim that a population proportion is greater than ... A hypothesis test is performed to test the claim that a population proportion is greater than ...
Morgan’s test-cross analysis of genetic linkage between autosomal genes Morgan’s test-cross analysis of genetic linkage between autosomal genes
Video: Dendrite Animation

For a complete list of videos, visit our video library