A sensor tipped with a blue light on the far side of Gillian Freeman's head will indicate how far she believes she must duck her head to get under the bar. Experimenter Mike Geuss adjusts the height of the bar and monitors the proceedings.
A sensor tipped with a blue light on the far side of Gillian Freeman's head will indicate how far she believes she must duck her head to get under the bar. Experimenter Mike Geuss adjusts the height of the bar and monitors the proceedings.