reliability in the "every day sense" is usually "a good thing."
reliability in the psychometric sense is usually "a good thing."
reliability in the psychometric sense has greater implications.
None of these
reliability is an all-or-none measurement
a test may be reliable in one context and unreliable in another
a reliability coefficient may not be derived for personality tests
alternate forms reliability may not be derived for personality tests
true score less the variance.
true score combined with extraneous factors.
the testtaker's true score and error.
lower standards in China as compared to the US for measuring math ability
higher standards in the US as compared to China for earning high grades
the ability of the Chinese students to read what was required in English
the reliability of the instrument used to test 12th grade math skills
Like error in general, measurement error may be random or systematic.
Unlike error in general, measurement error may be random or systematic.
Measurement error is always random.
Measurement error is always systematic.