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CATPERCCOL SIGNED

Perception of signals under varying conditions: implications of proportional processing of signal magnitude for signal design

Total Cost €

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EC-Contrib. €

0

Partnership

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 CATPERCCOL project word cloud

Explore the words cloud of the CATPERCCOL project. It provides you a very rough idea of what is the project "CATPERCCOL" about.

evolution    magnitude    encounters    individuals    differ    male    dr    maculatus    vision    data    female    taxa    reflecting    human    primates    shows    stimulus    dimorphism    manipulating    models    acuities    weber    sword    perceptual    environment    fin    examine    behaviours    mechanisms    tests    expertise    swords    mate    variety    discontinuous    quality    males    bars    swordtail    vary    operate    species    xiphophorus    perceive    interactions    indicate    circles    length    law    kelley    receiver    visual    organisation    helleri    invaluable    collaborative    concomitant    interact    forefront    animal    generality    assume    spans    perceived    caudal    certain    ranges    exeter    nature    green    color    discriminate    females    shown    auditory    extended    perception    host    stimuli    sexual    agonistic    amount    relationship    modalities    viewer    opening    signals    variation    career    trait    differs    compare    humans    proportional    training    modal    signal    signaling    mechanism    first    environmental    irrelevant    swordtails    insights    implicitly    proportionally    readily    discontinuously    tested    behavior    combining    signaler    follows    exhibits    70mm    acoustic   

Project "CATPERCCOL" data sheet

The following table provides information about the project.

Coordinator
THE UNIVERSITY OF EXETER 

Organization address
address: THE QUEEN'S DRIVE NORTHCOTE HOUSE
city: EXETER
postcode: EX4 4QJ
website: www.ex.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Total cost 183˙454 €
 EC max contribution 183˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2017
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2019
 Duration (year-month-day) from 2019-08-15   to  2021-08-14

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE UNIVERSITY OF EXETER UK (EXETER) coordinator 183˙454.00

Map

 Project objective

Individuals evaluate one another during interactions using assessment signals that indicate quality, and these signals vary across individuals, reflecting variation in signaler quality. For example, green swordtail (Xiphophorus helleri) females assess the length of an extended caudal fin (known as a sword) on males, which ranges in length from 10-70mm in nature, during mate choice, and males evaluate one another’s swords during agonistic encounters. Models of signal evolution implicitly assume that signals are perceived continuously, meaning that each change in signal magnitude is both perceived by the receiver and results in a concomitant change in receiver response. Increasing evidence, however, shows that signals across modalities, from acoustic signals to color-based visual signals, can be perceived discontinuously. One mechanism by which stimuli can be perceived discontinuously is called proportional processing, which follows Weber’s law. Under proportional processing, a viewer can more readily discriminate between two stimuli that differ by a certain amount when both of those stimuli are of low magnitude, compared with two stimuli that differ by the same amount but are both high magnitude. Although proportional processing has been shown to operate across a variety of taxa and modalities, no study has yet tested for proportional processing of a visual signal. This project will (1) test whether signal magnitude, i.e. male sword length, is perceived continuously or proportionally by female and male swordtails; (2) assess how perception of stimulus magnitude is affected by variation in environmental conditions, by manipulating both the visual and auditory environment; (3) compare perception of signal-relevant (bars) and signal-irrelevant (circles) stimuli, between a swordtail species that exhibits sexual dimorphism in sword length (X. helleri) with one that does not (X. maculatus), to examine the evolution of perceptual processes; and (4) compare perception of the signal magnitude in swordtails with existing data on length perception in a variety of taxa (including humans), to examine the generality of proportional processing of length across species, and how perception differs between species with very different visual acuities (ability to perceive detail) and signaling behaviours. This project will be the first to examine proportional processing of a visual signaling trait in any non-human animal and will provide the first tests of how viewing conditions and multi-modal stimuli impact perception of signal magnitude in non-primates. By combining my expertise in different mechanisms of discontinuous perception with the expertise of Dr Kelley at Exeter, which spans animal behavior, acoustic signaling, and perceptual processing, we will (1) provide novel insights into the relationship between signal design, behaviour, and environment, (2) increase our understanding of how vision and higher-level perceptual processes interact in the perceptual organisation of stimuli, and (3) provide invaluable training in managing a large project at the forefront of perception research, thus opening a host of career and collaborative opportunities.

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