2. The simplest, most non-technical way to
think of the standard error of measurement
(SEM) is the following:
If a single student were to take the same test
repeatedly (with no new learning taking place
between testings and no memory of question
effects), the standard deviation of his/her
repeated test scores is denoted as the
standard error of measurement.
3. You use SEM to determine how reliable a test
is and if you can have confidence in the
scores you get from that test.
You would use SEM in your classroom to find
out how much that students score could
change on re-testing with the same test or
something close to the same test.
The test scores could be considered an
estimate of the student’s achievement level.
4. This video is about Standard Error of
Measurement and how to calculate it and
why you may use Standard Error Of
Measurement
https://www.youtube.com/watch?v=PZDD
Wd-jUzM
https://www.youtube.com/watch?v=Nuxg-qoqPTw
7. “True” Score is a calculation that is
founded in theory and research that the
farther from a test mean a particular
student’s score is , the greater the chance
for error within the obtained score. (123)
This is just another way of calculating a
students score but is supposed to be a
better estimation than Standard Error of
Measurement.
8. “True” score is a powerful model for
measurement it reminds us that most
measurement has an error component.
The estimated “true” scores can be used to find
a range of scores by using the standard error of
measurement for the estimated “true” score.
9. Estimated True Score= M + r( X – M)
• M = mean of group of which person is a member
• r = reliability coefficient
• X = obtained score
10. Using the formula for estimated “true” score,
the calculation for an obtained score of 115
with an r of .78 and a mean of 100.
• Estimated “true” score = 100 + .78 (115 – 100)
=100 + .78 (15)
=100 + .11.7
=111.7
In this example, 111.7 is closer to the mean of 100 than
115.
11. Assessing Learners with Special Needs an
Applied Approach.
http://www.socialresearchmethods.net/kb/tr
uescor.php