when the pre-testing in an experiment heightens participants sensitivity and makes them behave in a systematically different way during the experiment that prevents the results being generalised to a population of interest (ie it reduces external validity).
RESEARCH PRE-TEST MANIPULATION INTERACTION BIAS ( INTERACTIVE TESTING EFFECT)
Meaning of RESEARCH PRE-TEST MANIPULATION INTERACTION BIAS ( INTERACTIVE TESTING EFFECT) in English
Raynet Business and Marketing English glossary. Английский глоссарий компании Raynet Business and Marketing . 2012