__________________ refers to a test's consistency of scores.
reliability-validity relationship. validity of a test depends on some extent on the reliability of the test. The test validity is also dependent to some extent on the reliability of the CRITERION. If a test has no reliability, then no validity. However, a test can be perfectly reliable without its validity. The different versions of the test do not produce the same responses. The test is not produce the same results across time. The test, when split and half and compared, does not produce the same results. The test items do not repeatedly measure what they say they measure. Stability reliability refers to the consistency of students' scores when a test is administered to the same students on two different occasions. Alternate-form reliability describes the consistency of students' performances on two different (hopefully equivalent) versions of the same test. To get a fix on how consistent an individual student's test score is, the teacher can look at the test's standard error of measurement (SEM). Standard errors of measurement, which differ from test to test, are similar to the plus-or-minus margins of error accompanying most opinion polls. Correlation. Reliability. Variance. Suppose you created a new measure of reading comprehension and you wanted to test its validity. Therefore you compare the results of your new measure to existing validated measures of reading comprehension and find that your measure compares well with these other measures. They tell a teacher how likely it is that a student's score would fall within a specific score range if a student were (theoretically) to take the same test 100 times. A standard error of measurement of 1 or 2 means the test is quite reliable. As far as validity is concerned, the term doesn't refer to the accuracy of a test (see A Misunderstood Grail in the September 2008 Educational Leadership). Rather, it refers to the accuracy of score-based inferences about test takers. So, the Submit Answers for Grading button below will not work. The following Submit Answers for Grading button is provided in its place and will clear your answers: So, the Clear Answers and Start Over button below will not work. The following Clear Answers button is provided in its place and will clear your answers: Suppose, for example, a student earned a score of 53 points on a 70-point test that had a standard error of measurement of 1. We can make two assumptions: First, about 68 percent of the time, that student would score within plus or minus one point of the original score (between 52 and 54). 1) degree of correlation between the test and criterion 2) cut-off score on the test (trade-off btwn false positive rate n false negative rate; one must decide what result is preferable).
Stability reliability