A researcher is constructing a test for use in a study. In order ...

[kshipps]

A researcher is constructing a test for use in a study. In order to insure the highest reliability, the researcher should
 
  a. increase the number of items on the test.
  b. plan to increase item homogeneity.
  c. try out the test on a heterogeneous group.
  d. All of these are true.

Question 2

A researcher has constructed an attitude scale in which each item is scored from 1 to 5 depending on the extent of agreement or disagreement. The estimate of score reliability that would be recommended for this scale is
 
  a. Kuder-Richardson formula 20.
  b. Kuder-Richardson formula 21.
  c. Cronbach's coefficient alpha.
  d. biserial correlation coefficient.
  e. phi coefficient.

[swimkari]

Answer to Question 1

D

Answer to Question 2

C

[kshipps]

Thanks for the timely response, appreciate it

[meganmoser117]

Wow, this really help