Analogous to binocular convergence, we tested Descartes's proposal that a blind person could triangulate distances using crossed hand-held rods by sensing hand separation and wrist angles. In Experiment 1, 22 participants judged distances to loci at 4 distances, 18-36 in. (45.7-91.4 cm), at 5 eccentricities, 0-12 in. (0-30.5 cm) left and right of center. Participants reliably differentiated and scaled distances. The median individual multiple correlation (actual distances and eccentricities vs. judged distances; nonlinear with eccentricity) was .91 (range, .75 to .95; group R = .98). In Experiment 2, 2 experienced observers judged 7 distances, 30-66 in. (76.2-167.6 cm) at 7 eccentricities, 0-18 in. (0-45.7 cm) left and right. Results replicated those of Experiment 1, with nonlinear multiple Rs of .97 and .99 for the 2 participants. Bimanual triangulation supported reliable distance judgments, comparable to binocular distance perception. No evidence of perceptual learning was found.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Acoustic characteristics of three English semivowels /l, ɹ, w/ and vowels in young children with and without speech sound disorders.
J Commun Disord
December 2024
Department of Communication Sciences and Disorders, University of Wisconsin - Eau Claire, Human Sciences and Services 127, 239 Water Street, Eau Claire, Wisconsin 54703, United States. Electronic address:
Purpose: The aim of the current study is to examine if the relationship among three semivowel sounds (/l, ɹ, w/) and between the semivowel and the following vowel differs by children's overall speech proficiency, and if this relationship affects listeners' perceptual judgment of the liquid sounds (/l, ɹ/). The acoustic proximity among the three semivowel sounds and the acoustic characteristics of the following vowel sounds were examined by each child speaker's overall speech sound proficiency and their semivowel accuracy.
Methods: A total of 21 monolingual English-speaking children with and without speech sound disorders produced monosyllabic words that include target semivowel sounds in word-initial position in different vowel contexts.
Prediction of peak particle velocity using hybrid random forest approach.
Sci Rep
December 2024
School of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.
Blasting excavation is widely used in mining, tunneling and construction industries, but it leads to produce ground vibration which can seriously damage the urban communities. The peak particle velocity (PPV) is one of main indicators for determining the extent of ground vibration. Owing to the complexity of blasting process, there is controversy over which parameters will be considered as the inputs for empirical equations and machine learning (ML) algorithms.
View Article and Find Full Text PDFPersonalized deep learning auto-segmentation models for adaptive fractionated magnetic resonance-guided radiation therapy of the abdomen.
Med Phys
December 2024
Department of Radiation Oncology, LMU University Hospital, LMU Munich, Munich, Germany.
Background: Manual contour corrections during fractionated magnetic resonance (MR)-guided radiotherapy (MRgRT) are time-consuming. Conventional population models for deep learning auto-segmentation might be suboptimal for MRgRT at MR-Linacs since they do not incorporate manual segmentation from treatment planning and previous fractions.
Purpose: In this work, we investigate patient-specific (PS) auto-segmentation methods leveraging expert-segmented planning and prior fraction MR images (MRIs) to improve auto-segmentation on consecutive treatment days.
Deep learning for segmentation of colorectal carcinomas on endoscopic ultrasound.
Tech Coloproctol
December 2024
Department of Applied Mathematics, Technical Medical Center, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, the Netherlands.
Background: Bowel-preserving local resection of early rectal cancer is less successful if the tumor infiltrates the muscularis propria as opposed to submucosal infiltration only. Magnetic resonance imaging currently lacks the spatial resolution to provide a reliable estimation of the infiltration depth. Endoscopic ultrasound (EUS) has better resolution, but its interpretation is investigator dependent.
View Article and Find Full Text PDFDichotomous horizontal representation of acute deterioration risk on illnesses.
Sci Rep
December 2024
Department of Human Sciences [Psychology], Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji-shi, Tokyo, 192-0397, Japan.
Article Synopsis
- Research on the interaction of spatial information and perceived risks, like the SNARC effect, shows inconsistent left-to-right representations of risk among individuals.
- The study involved registered nurses and college students who assessed the risk levels of illnesses by pressing buttons to indicate comparisons to a standard stimulus, with their reaction times recorded.
- While no overall spatial-risk association was found, approximately half of the participants had a left-to-right representation of risk, and the other half had a right-to-left representation, indicating that individuals may perceive acute deterioration risks differently based on personal or situational factors.
Want 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!