Procedures for validating an instrument
Usually the test result is the dependent variable, the measured response based on the particular conditions of the test or the level of the independent variable.
Some tests, however, may involve changing the independent variable to determine the level at which a certain response occurs: in this case, the test result is the independent variable.
Relevant aspects include calibration, use of blanks, performance characteristics of the procedure, and reporting of results.
An aspect of utmost importance of quality management, the quality control by inspection of the results, is discussed separately in Chapter 8.
” The response was usually a polite, “I can’t, but have you tried talking to doctor so and so, he might be able to help.” Doctor so and so couldn’t help either. Dave Collingridge is a senior research statistician for a large healthcare organization located in Utah, USA.
He has published several quantitative and qualitative research articles in healthcare, psychology, and statistics.
Here's a brief summary of our lessons on method validation.
He has been a member of Methodspace for several years.
I found it strange that faculty in a psychology department were unable to tell a graduate student how to validate a survey.
Qualitative By Dave Collingridge I remember years ago walking the halls of the faculty offices at my university asking for help on validating a questionnaire.
I repeatedly asked professors, “Can you tell me how to validate the questions in my survey?