I am planning to develop a ordinal scale to assess a motor function like sitting to standing. I like to know method to develop and test its relevant psychometric properties. I will be happy if someone likes to work with me.
Dear Dr. Ramachandran,
In general, the type of measurement scale does not significantly influence the procedure of psychometric assessment. The assessment of psychometric properties involves the check of reliability (internal consistency, test-retest) and validity (construct validity, criterion validity) of the results obtained with the measure. The type of measurement scale may change statistical procedures that you apply to obtain necessary evidence of reliability and validity, but will not change the procedure of scale development.
Best regards,
Kirill
Dear Kirill,
Thank you for the reply. Can you provide some information on steps to develop an ordinal scale.
Hello Sivakumar,
Another tactic is to develop your scale using item response theory methods. IRT approaches have been used with considerable success in a variety of human psychomotor capability scales.
Here are a couple of references as a start:
Cole, E. L. (1989). An application of item response theory to the Test of Gross Motor Development. M.S. Thesis, Oregon State University.
https://ir.library.oregonstate.edu/downloads/5t34sp65m
Spray, J. A. (1987). Recent developments in measurement and possible applications to the measurement of psychomotor behavior. Research Quarterly for Exercise and Sports, 58, 203-209. doi:10.1080/02701367.1987.10605449
Spray, J. A. (1990). One-parameter item response theory models for psychomotor tests involving repeated, independent attempts. Research Quarterly for Exercise and Sports, 61, 162-168. doi:10.1080/02701367.1990.10608670
Finally, here's a good, basic text on scale development in general:
DeVellis, R. F. (2017). Scale development: Theory and applications (4th ed.). Los Angeles, CA: SAGE Publications.
Good luck with your work!
Ths question makes no sense my friend.. Why dont you first check out the "google scholar search engine"
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