ABSTRACT

Humans are distinguished from four-legged animals by the shape of their spine and larger pelvic bones. Subjective ratings consisted of comfort ratings associated with variations in seat angles. Seat angles in the experiment ranged from 4 back to 6 forward, with two pitches. Subjects rated their subjective comfort, sense of postural stabilities associated with different seat angles on a five point scale. Two chairs were used as experimental devices; one with the seat attached to the back rest and another with the seat separated from the back rest. The subjects performed 10 minutes of English-Japanese translation while seated in the experimental chairs, then scored the chairs on 'good-bad' point scale. However, because office desks must be evaluated in conjunction with the chair, relationship between the gradient of the desk surface and that of the seat is of critical importance.