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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.

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

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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