title: Effects of Numerosity Range on Tactile and Visual Enumeration.
abstract: Our study explores tactile enumeration using both hands and investigates the effects of numerosity range's (NR) on general enumeration. In Experiment 1, using custom-made vibro-tactile apparatus, we replicated results of Cohen, Naparstek, and Henik (2014, Acta Psychologica, 150C, 26-34) and again found a moderate increase in RT up to four stimuli and then a decrease for five stimuli. In Experiment 2, we used a within participants design and compared NR 1 to 5 and 1 to 10 in tactile and visual enumeration. The results showed that enumeration for NR 5 to 1 was faster than for NR 1 to 10, especially for numerosities four and five. Within NR 1 to 10, in the visual modality the subitizing range was 4, the counting range was from 5 to 9, and there was an end effect of 10 dots. In the tactile modality, when excluding one-hand arrangements, the subitizing range was 2, the counting range was from 3 to 5, there was an acceleration of counting from 5 and on, and there was an end effect for 10 stimuli that was stronger than for 10 visual stimuli. We suggest that NR influences enumeration and that number-hand association (i.e. resulting from finger counting) influences enumeration, resulting in faster counting.
authors.affiliation: Department of Psychology, Ben-Gurion University of the Negev, Beer-Sheva, Israel Zahiraci@gmail.com.
authors.forename: Zahira Z
authors.initials: ZZ
authors.lastname: Cohen
authors.affiliation: Department of Psychology and the Zlotowski Center for Neuroscience, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
authors.forename: Avishai
authors.initials: A
authors.lastname: Henik
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D055641:Mathematical Concepts; D011597:Psychomotor Performance / Q000502:physiology*; D055698:Touch Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Enumeration; comparison; embodied numerosity; end effect; finger counting; numerosity range; range size; subitizing; tactile; vibro-tactile stimuli; visual