Topic: Test-Retest Reliability

Message

   Test-Retest Reliability
 We
estimate test-retest reliability when we administer the same test to
the same sample on two different occasions. This approach assumes that
there is no substantial change in the construct being measured between
the two occasions. The amount of time allowed between measures is
critical. We know that if we measure the same thing twice that the
correlation between the two observations will depend in part by how
much time elapses between the two measurement occasions.

The shorter the time gap, the higher the correlation; the longer the
time gap, the lower the correlation. This is because the two
observations are related over time -- the closer in time we get the
more similar the factors that contribute to error. Since this
correlation is the test-retest estimate of reliability, you can obtain
considerably different estimates depending on the interval.

Author	Message
tanushree Senior Member Joined: 04Apr2007 Online Status: Offline Posts: 2160	Topic: Test-Retest Reliability Posted: 08Oct2007 at 12:13am
	Test-Retest Reliability We estimate test-retest reliability when we administer the same test to the same sample on two different occasions. This approach assumes that there is no substantial change in the construct being measured between the two occasions. The amount of time allowed between measures is critical. We know that if we measure the same thing twice that the correlation between the two observations will depend in part by how much time elapses between the two measurement occasions. The shorter the time gap, the higher the correlation; the longer the time gap, the lower the correlation. This is because the two observations are related over time -- the closer in time we get the more similar the factors that contribute to error. Since this correlation is the test-retest estimate of reliability, you can obtain considerably different estimates depending on the interval. Post Resume: Click here to Upload your Resume & Apply for Jobs

	IP Logged


One Stop Testing Forum : Software Testing @ OneStopTesting : Beginners @ OneStopTesting