[powerclue]

You see how that's worse, right? That both intrinsic and extrinsic motivation to comply with the test can swing numbers, so choosing exactly one set of conditions necessarily benefits one group over another rather than creating an environment where everyone performs at their local optimum.

[naasking]

> rather than creating an environment where everyone performs at their local optimum.

There's likely no such thing, so your best bet is to conduct the tests under a variety of conditions and aggregate the results. This has been the case for IQ for almost a century.

[Aurornis]

You’re really stretching. It’s a test. They’re not dangling marshmallows or $100 bills in front of some participants but not others dependent on results. In a study like this they may not even see the results.