find out if they can tell by touch if one or two points of a hairpin are touching the skin. one pupil is the experiment; the other is the subject the experimenter takes a hairpin and gently presses one or both points against the skin of the subject
find out if they can tell by touch if one or two points of a hairpin are touching the skin. one pupil is the experiment; the other is the subject the experimenter takes a hairpin and gently presses one or both points against the skin of the subject