Method for quantitative estimation of position perception using a joystick during linear movement.
We designed a method for quantitatively estimating self-motion perceptions during passive body movement on a sled. The subjects were instructed to tilt a joystick in proportion to perceived displacement from a giving starting position during linear movement with varying displacements of 4 m, 10 m and 16 m induced by constant acceleration of 0.02 g, 0.05 g and 0.08 g along the antero-posterior axis. With this method, we could monitor not only subjective position perceptions but also response latencies for the beginning (RLbgn) and end (RLend) of the linear movement. Perceived body position fitted Stevens' power law, where R=kSn (R is output of the joystick, k is a constant, S is the displacement from the linear movement and n is an exponent). RLbgn decreased as linear acceleration increased. We conclude that this method is useful in analyzing the features and sensitivities of self-motion perceptions during movement.
Wada
Y
Y
Department of Visual Neuroscience, Division of Higher Nervous Control, Okayama University, Okayama, Japan.
Tanaka
M
M
Mori
S
S
Chen
Y
Y
Sumigama
S
S
Naito
H
H
Maeda
M
M
Yamamoto
M
M
Watanabe
S
S
Kajitani
N
N
D000054:Acceleration; D000337:Aerospace Medicine; D006801:Humans; D009039:Motion Perception; D009949:Orientation; D011930:Reaction Time; D013028:Space Perception