Lowered performance compared to a previously higher level is ...

[eruditmonkey@yahoo.com]

Lowered performance compared to a previously higher level is referred to as
 
  a. an index.
  b. deterioration.
  c. a ceiling effect.
  d. manifold.

Question 2

The reliability coefficient is
 
  a. the mean of the observed scores.
  b. the variance of the observed scores.
  c. the ratio of the mean of the true scores on a test to the mean of the observed scores.
  d. the ratio of the variance of the true scores on a test to the variance of the observed scores.

[cat123]

Answer to Question 1

b

Answer to Question 2

d

[eruditmonkey@yahoo.com]

Great answer, keep it coming

[AngeliqueG]

Thanks for the timely response, appreciate it