Exam 17: Tests and Measurements

When a test has been shown to be reliable, it means that its results

Using the standard error of measurement found above, find the confidence interval at the .95 level for the following KABC scores: a. 80 b. 90 c. 100 d. 110 e. 120

A new test, designed to test parental permissiveness among parents of K through 4th grade children, was developed and you as the statistical consultant have been asked to assess its reliability. The test is composed of 4 items and was given to a random sample of 5 parents. The items on the test were scored from 1 to 10, with 10 showing the most permissiveness. Using the Cyril Hoyt ANOVA, find the internal consistency reliability of the test. Items Items Subjects a b c d 1 8 10 9 8 2 10 8 9 10 3 6 6 7 4 4 3 3 7 5 5 1 2 5 8

A forensic psychologist is attempting to assess the reliability of a new test of psychopathy. A random sample of inmates from a large state prison, all of whom had been convicted of violent offenses was selected and given the test. Assume that the test is composed of five items. The test items were scored from 1 to 10, with a 10 assumed to define the highest level of psychopathy. Items Subjects a. b. c. d e. 1 1 3 2 6 2 2. 7 9 8 10 9 3. 5 6 7 4 5 4. 8 8 9 10 8 5. 3 4 5 4 4 6. 2 6 5 3 2 7. 7 6 8 6 7 8. 9 10 10 10 9 9. 5 5 6 5 4 10. 7 8 5 7 6

The Kuder-Richardson formula (KR21) presented in the chapter is used for establishing

When predicting all possible scores a given individual could have obtained around the actual score that was obtained, we can use the

The correlation between the odd and even numbered items for a given test provides an estimate of the test's reliability.

All tests that have been shown to be statistically reliable, must also be

A test specialist is attempting to find the reliability of a test designed to assess drug dependence. Ten subjects were randomly selected from a group of individuals. all of whom on a waiting list for a treatment program for drug abuse. The subjects were all given the test and then a week later were retested. The scores were as follows: Subject\# Test Retest 1 45 50 2 35 32 3 50 54 4 67 70 5 45 40 6 55 60 7 65 62 8 50 48 9 60 70 10 45 40 Find the test-retest reliability value.