We studied the impact of manner of exploration, orientation, spatial position, and configuration on the haptic Müller-Lyer illusion. Blindfolded sighted subjects felt raised-line Müller-Lyer and control stimuli. The stimuli were felt by tracing with the index finger, free exploration, grasping with the index finger and thumb, or by measuring with the use of any two or more fingers. For haptic judgments of extent a sliding tangible ruler was used. The illusion was present in all exploration conditions, with overestimation of the wings-out compared to wings-in stimuli. Tracing with the index finger reduced the magnitude of the illusion. However, tracing and grasping induced an overall underestimation of size. The illusion was greatly attenuated when stimuli were felt with the index fingers of both hands. Illusory misperception was not altered by the position in space of the Müller-Lyer stimuli. No effects of changes in the thickness of the line shaft were found, but there were effects of the length of the wing endings for the smaller, 5.1 cm stimuli. The theoretical and practical implications of the results are discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1068/p5269 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Reprogrammable Flexible Piezoelectric Actuator Arrays with a High Degree of Freedom for Shape Morphing and Locomotion.
Soft Robot
January 2025
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, China.
The high degree of freedom (DoF) shape morphing widely exists in biology for mimicry, camouflage, and locomotion. Currently, a lot of bionic soft/flexible actuators and robots with shape-morphing functions have been developed to realize conformity, grasp, and movement. Among these solutions, two-dimensional responsive materials and structures that can shape morph into different three-dimensional configurations are valuable for creating reversible high DoF shape morphing.
View Article and Find Full Text PDFDecoding roughness perception in distributed haptic devices.
PNAS Nexus
October 2024
Department of Mechanical Engineering, Texas A&M University, 3123 TAMU, College Station, TX 77843, USA.
Article Synopsis
- The ability to create realistic texture perception through haptic devices has been a challenge, mainly focusing on how we perceive roughness via skin mechanoreceptors.
- Existing models for predicting texture perception are limited to normal stimuli and do not account for important factors like lateral shear forces or dispersed actuator configurations that can enhance the perception of roughness.
- A new predictive model developed in this study successfully forecasts perceived roughness based on various external stimuli and has been validated with experimental results, highlighting the importance of strain variation and lateral shear forces for accurate texture sensation.
Feeling senseless sensations: a crossmodal EEG study of mismatched tactile and visual experiences in virtual reality.
J Neural Eng
October 2024
Systems Neuroscience and Neurotechnology Unit, Faculty of Medicine, Saarland University & School of Engineering, htw saar, Homburg/Saar, Germany.
To create highly immersive experiences in virtual reality (VR) it is important to not only include the visual sense but also to involve multimodal sensory input. To achieve optimal results, the temporal and spatial synchronization of these multimodal inputs is critical. It is therefore necessary to find methods to objectively evaluate the synchronization of VR experiences with a continuous tracking of the user.
View Article and Find Full Text PDFA NOVEL FOUR-POINT SCLERAL FIXATION TECHNIQUE WITH A HYDROPHOBIC INTRAOCULAR LENS: The Loop to Optic and Trailing end to Outside Technique.
Retina
January 2025
Department of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
Purpose: To describe a new surgical technique that combines four-point, flanged polypropylene scleral fixation with a hydrophobic intraocular lens (IOL).
Methods: Using the Envista MX60 and 6.0 polypropylene, scleral four-point fixation was achieved using a flanged-suture technique five times in a model eye and in a case series of eight patients, retrospectively reviewed.
Finding the rhythm: Humans exploit nonlinear intrinsic dynamics of compliant systems in periodic interaction tasks.
PLoS Comput Biol
September 2024
Sensor Based Robotic Systems and Intelligent Assistance Systems, TUM School of Computation, Information and Technology, Technical University of Munich (TUM), Garching, Germany.
Activities like ball bouncing and trampoline jumping showcase the human ability to intuitively tune to system dynamics and excite motions that the system prefers intrinsically. This human sensitivity to resonance has been experimentally supported for interactions with simple linear systems but remains a challenge to validate in more complex scenarios where nonlinear dynamics cannot be predicted analytically. However, it has been found that many nonlinear systems exhibit periodic orbits similar to the eigenmodes of linear systems.
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!