I am working in the design of a survey to a national representative sample. The time in the pilot application is around 50 minutes. In the final of the questionnaire we are including the Raven's Test to measure Cognitive Skills.
I have the doubt about the realiability of this measuring: the risk of measure cognitive skills with cognitive bias in the final of a large questionnaire. We can not change it to another part of the questionnaire, so my possition is drop the Raven's test, because it is not a main objective of the survey. What is your opinion?
Your concern is justified. Every scientist and physician must think about the feasibility and informativeness of the methods and tests to conclude that cognitive functions. Tests often do not take into account the individual characteristics of a person. Ask to meet with the text of the article, in which the authors tested their doubts about the adequacy of selected methods.
I agree that this seems like adding one more rather peripheral measure to any already rather lengthy survey. Also, you might get some negative reactions from the respondents because most people don't like to have their intelligence tested without a good reason.
I believe the answer would be YES. You can not control the bias in such large scale after 50 minutes!!!!!!!
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