> Measure changes in something the test subject isn't expecting and wouldn't realize they need to fake? E.g. if you had to sit in the waiting room for 5 extra m

> Measure changes in something the test subject isn't expecting and wouldn't realize they need to fake? E.g. if you had to sit in the waiting room for 5 extra minutes, your test score changes like this. I can discard this by saying "well, the subject might behave subconsciously differently when they know they are in any experiment". How would you refute that? > Measure differences below conscious control, like reaction speed to positive/negative/etc words after exposure to certain inputs. What if there are phenomena that don't correlate with the differences you know to measure?