A1 Journal article – refereed

Judging Total Volumes Of Silhouetted Spheres In Different Numerosities

List of Authors: Ruusuvirta T, Railo H


Publication year: 2017

Journal: Perception

Journal name in source: PERCEPTION

Journal acronym: PERCEPTION

Volume number: 46

Issue number: 10

Number of pages: 11

ISSN: 0301-0066

eISSN: 1468-4233

DOI: http://dx.doi.org/10.1177/0301006617711063

Volume and number are addressed separately rather than combined in perception research. Yet, our everyday problems often involve summed continuous volumes of countable solid objects with partial depth cues (e.g., food items). The participants were presented with a set of black-and-white silhouettes of spheres that independently varied in numerosity (from 1 to 6) and total volume (2, 4, 6, or 8), and an adjacent silhouette of a partially filled cylinder. They judged how much the silhouetted sphere(s) in the set would raise the level of the cylinder content if the spheres were immersed into that content. Higher total volumes and numerosities of the spheres were judged slower and underestimated. Lower total volumes and numerosities were judged faster and overestimated. These effects strongly reflected the total silhouette area of the spheres in a set. The discontinuous effect of numerosity on judgment accuracy and speed suggested separate judgment modes below and above Numerosity 3.

Last updated on 2021-24-06 at 10:23