Perceptual judgments of duration of parabolic motions
| Autor: | Myrka Zago, Barbara La Scaleia, Joan López-Moliner, Francesco Lacquaniti, Björn Jörges |
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| Rok vydání: | 2021 |
| Předmět: |
Gravity (chemistry)
Science Gravity Newton's laws of motion Moviment Kinematics Speed Gravitational acceleration Settore BIO/09 Article 050105 experimental psychology Motion (physics) Virtual reality 03 medical and health sciences Motion 0302 clinical medicine Gravitational field 0501 psychology and cognitive sciences Physics Multidisciplinary Realitat virtual 05 social sciences Mathematical analysis Velocitat Gravity of Earth Gravetat Percepció Medicine Perception Constant (mathematics) 030217 neurology & neurosurgery Neuroscience |
| Zdroj: | Dipòsit Digital de la UB Universidad de Barcelona Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) Scientific Reports |
| Popis: | In a 2-alternative forced-choice protocol, observers judged the duration of ball motions shown on an immersive virtual-reality display as approaching in the sagittal plane along parabolic trajectories compatible with Earth gravity effects. In different trials, the ball shifted along the parabolas with one of three different laws of motion: constant tangential velocity, constant vertical velocity, or gravitational acceleration. Only the latter motion was fully consistent with Newton’s laws in the Earth gravitational field, whereas the motions with constant velocity profiles obeyed the spatio-temporal constraint of parabolic paths dictated by gravity but violated the kinematic constraints. We found that the discrimination of duration was accurate and precise for all types of motions, but the discrimination for the trajectories at constant tangential velocity was slightly but significantly more precise than that for the trajectories at gravitational acceleration or constant vertical velocity. The results are compatible with a heuristic internal representation of gravity effects that can be engaged when viewing projectiles shifting along parabolic paths compatible with Earth gravity, irrespective of the specific kinematics. Opportunistic use of a moving frame attached to the target may favour visual tracking of targets with constant tangential velocity, accounting for the slightly superior duration discrimination. |
| Databáze: | OpenAIRE |
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