Page 151 - A Step-By-Step Guide to Questionnaire Validation Research
P. 151
measure knowledge) is rarely necessary, though it is still
possible.
The main take-home message is that there is no
guarantee that any questionnaires which have been
published in the existing literature, books, internet or
full-text reports can be truly reliable and valid. For a
questionnaire to be deemed valid and reliable, it is
necessary for the researchers who are involved in
developing the questionnaire to garner sufficient evidence
of both its reliability and validity, which can o en be
found in the citing literature. By simply assuming that a
questionnaire is reliable and valid when it is actually not,
the researcher may subsequently encounter problems
when he/she is conducting the validation study on a
questionnaire if it turns out to have failed to produce
sufficient evidence of both its reliability and validity.
Nevertheless, nobody can forbid a researcher to conduct a
