Background: When people are asked to indicate the vanishing location of a moving target, errors in the direction of motion (representational momentum) and in the direction of gravity (representational gravity) are usually found. These errors possess a temporal course wherein the memory for the location of the target drifts downwards with increasing temporal intervals between target's disappearance and participant's responses (representational trajectory).
Objective: To assess if representational trajectory is a body-referenced or a world-referenced phenomenon.
Methods: A behavioral localization method was employed with retention times between 0 and 1400 ms systematically imposed after the target's disappearance. The target could move horizontally (rightwards or leftwards) or vertically (upwards or downwards). Body posture was varied in a counterbalanced order between sitting upright and lying on the side (left lateral decubitus position).
Results: In the upright task, the memory for target location drifted downwards with time in the direction of gravity. This time course did not emerge for the decubitus task, where idiotropic dominance was found.
Conclusions: The dynamic visual representation of gravity is neither purely body-referenced nor world-referenced. It seems to be modulated instead by the relationship between the idiotropic vector and physical gravity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3233/VES-140511 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Drop Dynamics during Condensation on Superhydrophobic Surfaces in Vapor Shear Flow.
Langmuir
January 2025
Brigham Young University, Provo, Utah 84602, United States.
Accurate models for predicting drop dynamics, such as maximum drop departure sizes, are crucial for estimating heat transfer rates during condensation on superhydrophobic (SH) surfaces. Previous studies have focused on examining the heat transfer rates for SH surfaces under the influence of gravity or vapor flowing over the surface. This study investigates the impact of surface solid fraction and texture scale on drop mobility in a condensing environment with a humid air flow.
View Article and Find Full Text PDFGrounded cognition and the representation of momentum: abstract concepts modulate mislocalization.
Psychol Res
January 2025
Institute of Psychology, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, North-Rhine Westphalia, Germany.
Literature on grounded cognition argues that mental representations of concepts, even abstract concepts, involve modal simulations. These modalities are typically assumed to reside within the body, such as in the sensorimotor system. A recent proposal argues that physical invariants, such as momentum or gravity, can also be substrates in which concepts can be grounded, expanding the assumed limits of grounding beyond the body.
View Article and Find Full Text PDFExperience-dependent biases in face discrimination reveal associations between perceptual specialization and narrowing.
J Exp Psychol Gen
December 2024
Department of Special Education, Faculty of Education, University of Haifa.
Experience is known to be a key element involved in the modulation of face-processing abilities as manifested by the inversion effect, other-race, and other-age effects. Yet, it is unclear how exposure refines internal perceptual representations of faces to give rise to such behavioral effects. To address this issue, we investigated short- and long-term experienced stimulus history on face processing.
View Article and Find Full Text PDFSpinal maps in phasic and tonic EMG: Investigating intra-subject and inter-subject variability.
Neuroscience
January 2025
Institute of Intelligent Industrial Systems and Technologies for Advanced Manufacturing (STIIMA), Italian Council of National Research (CNR), Milan, Italy. Electronic address:
Reaching movements are essential for daily tasks and they have been widely investigated through kinematic, kinetic, and electromyographic (EMG) analyses. Recent studies have suggested that the central nervous system simplifies control of reaching movements by using muscle synergies. An alternative approach is to investigate how EMG activity reflects at theneural level with the representation of spinal maps that visualize the spatiotemporal activity of motoneuronal pools.
View Article and Find Full Text PDFTactile mechanisms and afferents underlying the rat pup transport response.
Curr Biol
December 2024
Neural Systems & Behavior, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543, USA; University of Edinburgh, Simons Initiative for the Developing Brain, 1 George Square, EH8 9JZ Edinburgh, Scotland, United Kingdom. Electronic address:
Juvenile rodents and other altricial mammals react with calming, immobility, and postural modifications to parental pickup, a set of behaviors referred to as the transport response. Here, we investigate sensory mechanisms underlying the rat transport response. Grasping rat pups in anterior neck positions evokes strong immobility and folding up of feet, whereas more posterior grasping has lesser effects on immobility and foot position.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!