Alternate-Form ReliabilityAlternate-Form Reliability

Quintin MolinaQuintin Molina

AED 615 – October 23, 2006AED 615 – October 23, 2006

Alternate Form Reliability Alternate Form Reliability

The degree to which two or more versions The degree to which two or more versions of the same test of the same test correlatecorrelate with one with one another.another.

Process – a given function is tested more Process – a given function is tested more than once over time and it is important to than once over time and it is important to have more than one version of a given have more than one version of a given instrument and to show that these different instrument and to show that these different versions are reasonably equivalent.versions are reasonably equivalent.(www.nationalmssociety.org/MUCS_glossary1.asp)(www.nationalmssociety.org/MUCS_glossary1.asp)

Example of Example of Alternate-Form ReliabilityAlternate-Form Reliability

If memory is tested through the learning of If memory is tested through the learning of a list of words, follow-up testing should a list of words, follow-up testing should use a different list of words of equivalent use a different list of words of equivalent difficulty. difficulty.

If the same list of words were used on the If the same list of words were used on the second testing, scores would be inflated second testing, scores would be inflated due to the subject’s prior knowledge of the due to the subject’s prior knowledge of the words.words.(www.nationalmssociety.org/MUCS_glossary1.asp)(www.nationalmssociety.org/MUCS_glossary1.asp)

AFR - Value to Survey ResearchAFR - Value to Survey Research

The correlation of scores on pairs of The correlation of scores on pairs of alternate forms for the same examinees alternate forms for the same examinees provides another measure of consistency provides another measure of consistency or reliability.or reliability.

www.ericdigests.org/2002-2/reliability.htmwww.ericdigests.org/2002-2/reliability.htm

Qualitative UsefulnessQualitative Usefulness

Heavily favored in the qualitative based Heavily favored in the qualitative based studies due to the fact that it lends itself studies due to the fact that it lends itself neatly to the measure of consistency.neatly to the measure of consistency.

JAE ArticleJAE Article

Journal of Agricultural Education ArticleJournal of Agricultural Education Article

BibliographyBibliography

www.nationalmssociety.org/MUCS_glossary1.aspwww.nationalmssociety.org/MUCS_glossary1.asp

www.ericdigests.org/2002-2/reliability.htmwww.ericdigests.org/2002-2/reliability.htm

VanLeeuwen, D.M., Dormody, T.J., Seevers, B.S.(1999). Assessing VanLeeuwen, D.M., Dormody, T.J., Seevers, B.S.(1999). Assessing the reliability of student evaluation of teaching (sets) with the reliability of student evaluation of teaching (sets) with generalizability theory. generalizability theory. Journal of Agricultural Education, Journal of Agricultural Education,

40(4), 40(4), 1-9.1-9.