I recently had the pleasure of attending a talk by Vicki Morwitz, Professor of Marketing at NYU's Stern School of Business. Vicki spends a lot of time trying to understand how the mere process of surveying people can lead to changes in their behavior - sometimes for an organization's good; sometimes not. She spoke at TRC's Frontiers of Research conference, and as part of her presentation she showed the audience data from an exercise on fruit grouping (or, if you prefer, the grouping of fruit).
Turns out that people who are first exposed to questions with very detailed answer options (e.g., given 9 different colors with which to describe their eyes) will go on to create more narrowly focused fruit categories. In contrast folks primed with more broadly constructed answer categories (e.g., given only 4 different colors) build fewer categories.
Her purpose - to demonstrate how questions asked early in a survey can affect responses later in the survey in a way that can change results. A (perhaps) unintended consequence - getting me to take stock of my role as a research practitioner.