(constant velocity, acceleration or deceleration) and tested TTC
Time-to-passage judgments in nonconstant optical flow fields. Percept ... a position in space. According to Lee (1976), Bootsma and Oudejans, (1993), TTC can.
Time-to-contact estimation during visual self-motion: Is second order information used for motion extrapolation? Aurore
Capelli ,
Manuel Vidal & Alain Berthoz
LPPA, CNRS / Collège de France, Paris, France, Introduction Time To Contact (TTC) is the time remaining before a moving object reaches an observer or a position in space.
Discussion
14 participants
Errors as a function of velocity profile, scene viewing times and tested TTC ?
Different strategies seemed to be used for TTC estimations as a function of the self-motion’ velocity profile.
VR application displayed on a 185°curved screen Figure 2 – A schematic model of the experimental setup: the participant seated in front of a 185° curve screen and hold a joystick in his hand.
Question & hypotheses
A 2 (velocity profile) x 3 (scene viewing time) x 3 (tested TTC) ANOVA was applied on the corrected gain (gain / corresponding gain obtained for constant velocity). The errors in self-motion extrapolation slightly increased for accelerations (overestimations) and decreased for decelerations (underestimations), as a function of both scene viewing time and tested TTC (F(2,26)=63.5, p
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test pattern displacements as opposed to simply measuring dif- ferences in error rate for a single pair of forward and backward distractors. By varying the implied ...
ducing displays implied a changing configuration of the elements of a pattern, depicting .... This follows from the general finding in the literature that dis- crimination time ... requirement in an introductory psychology course. Stimuli. The stimul
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database, and other application services. WWW, e-mail ... User sees application but can't use it .... Typically Word and Excel-like productivity applications.
visual and vestibular stimulations are in the same direction (Probst et al 1995). ... Twenty volunteers, ten female and ten male, aged between 18 and 42 years, ...
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crimination it has also been shown {Kosnik er al., 1985) that the discrimination of the direction of motion is not based on a sensorimotor response. As an aid to ...
short stick â less leverage available than a longer stick. .... A quick look at the effects of rudder deflection in a ... plane's dihedral effect and other less significant ...
infrared system was linear within the ± 20° range of eye movements used in this study. Drift was negligible dur ing each recording and, even if it were not, would ...
That is, "retinal" properties of flow are lost during self-motion (like "retinal" size and color are .... Their textbook suggests that the student lie under a tree⦠... moved our head with only one eye open we saw the two objects slide back and for
Phase, Group, and Signal Velocity. The velocity of a wave can be defined in many different ways, partly because there many different kinds of waves, and partly ...
Point laser light at a tracer particle travelling with a fluid, and the scattered .... oscillates at a frequency proportional to the volume flow rate of the main jet flow.
