ISSN 0439-755X
CN 11-1911/B

›› 1964, Vol. 8 ›› Issue (04): 3-13.

### DISTANCE PERCEPTION DURING POSTURAL CHANGES

CHING CHI-CHENG, PENG JUI-HSIANG, LIN CHUNG-HSIEN, FANG YUN-CHIU

• Online:1964-12-25 Published:1964-12-25

Abstract: S sits on a tilting chair which can be turned laterally from normal position (0°) to an upside-down position (180°) and makes distance judgments for lengths of 40, 80, and 120 metres on two ground tracks arranged in a V shape, with a standard stimulus on one track and a comparison, presented successively, on the other. Distance judgment is most accurate when S sits in the normal position; errors increase as body posture deviates from normal. A strong tendency is shown in the tilted postures to underestimate distance and this is maximum in the upside-down posture. This experiment suggests that normal body posture acts as a basis for reference in the perception of the outer world.

Key words: NULL