I just saw the most divine figure in a paper from 1974:
:chef’s kiss emoji:
The setup is a room with a static floor but the ‘walls and ceiling’ are an inverted open box that can be swung at will by the experimenters. This makes it look like the floor is tilting (and is the essence of carnival funhouses from time immemorial.) Adults in this setting will sway a little – it’s hard to ignore your eyes even when your ears and muscles are telling you you’re not moving. But what’s the story for infants? When do they learn to trust their non-visual cues?
“Not by the age of 16 months” is the answer. Poor dotted stick figure in panel c. Lee and Aronson only did the experiment with seven small subjects. Whether that’s because they ran out of time, volunteers, or ability to keep a straight face is lost to history…