What approximate Item Difficulty Index average is closest to the optimal item difficulty level for ...

What approximate Item Difficulty Index average is closest to the optimal item difficulty level for maximizing variability and reliability?
 
  a. .24
  b. .09
  c. .99
  d. .49

Ques. 2

During recent years, when results of NAEP tests are contrasted with results of state accountability tests, which of the following statements best captures the relationship between those two sets of results?
 
  A. Students' performances on NAEP and on state accountability tests are essentially equivalent.
  B. Students' performances on a state's tests are classified higher than those same students' scores on NAEP.
  C. Students' performances on NAEP are typically better than those same students' scores on their state's accountability tests.
  D. Students in a state usually score better on NAEP than they do on their own state's mathematics tests, but less well on their state's reading tests than they do on NAEP reading tests.

Ques. 3

Which of the following sources of validity evidence are teachers most likely to collect?
 
  A. Test content
  B. Response processes
  C. Internal structure
  D. Relations to other variables

Ques. 4

Two groups are given the Wechsler Intelligence Scale for Children-Fourth Edition. Group one is at a level of borderline impaired or delayed (mental retardation), and group two is at a level of superior intelligence? What type of validity study is this?
 
  a. Contrasted group study
  b. Concurrent study
  c. Predictive study
  d. Split-half study

Ques. 5

If a teacher knows that a student scored below 100 (below average) on an intelligence test, the teacher might assume the student is not going to perform well and have lower expectations of the student? Which of the following is a descriptive for this situation?
 
  a. Criterion contamination
  b. Content contamination
  c. Criterion-related validity
  d. Criterion validity

Ques. 6

When students' test scores areas predictedcorrelated positively with those students' scores on a test aimed at a similar measurement mission, of what is this an example?
 
  A. Construct-irrelevant variance
  B. Divergent validity evidence
  C. Convergent validity evidence
  D. Construct underrepresentation