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Cognition in the fast lane : ravens’ gazes are half as short as humans’ when choosing objects

Bobrowicz, Katarzyna LU and Osvath, Mathias LU (2018) In Animal behavior and cognition
Abstract
Time cannot be directly perceived; instead, its flow is inferred from the influx of sensory information. To prevent sensory overload, attentional mechanisms split up information into processable units. This portioning remains imperceptible to the individual. However, the length of these units still influences the speed of perception and the speed at which behaviors are performed. Previous studies have focused on establishing the length of these units in various mammalian species – mainly humans – by measuring different types of behaviors, including gaze. However, no such studies have been conducted on birds. We measured duration of ravens’ (Corvus corax) single gazes towards selectable objects before a choice was made, and compared it with... (More)
Time cannot be directly perceived; instead, its flow is inferred from the influx of sensory information. To prevent sensory overload, attentional mechanisms split up information into processable units. This portioning remains imperceptible to the individual. However, the length of these units still influences the speed of perception and the speed at which behaviors are performed. Previous studies have focused on establishing the length of these units in various mammalian species – mainly humans – by measuring different types of behaviors, including gaze. However, no such studies have been conducted on birds. We measured duration of ravens’ (Corvus corax) single gazes towards selectable objects before a choice was made, and compared it with humans in a similar set up. The raven gaze durations were approximately half those of humans (which fell slightly short of previously established ranges). We hypothesize that these differences are mainly due to the much higher so-called flicker-fusion-frequency in birds, which makes their vision faster in the sense that it picks up more information per time unit than mammalian vision does. We further discuss that the speed of perception might influence the general speed of cognitive processing in more complex tasks as well, and suggest that the addition of a temporal component in comparative cognitive studies might be informative. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
in press
subject
keywords
time constant, raven, moment, temporal processing, cognition, visual perception
in
Animal behavior and cognition
publisher
Sciknow Publications Ltd.
ISSN
2372-4323
language
English
LU publication?
yes
id
746d2326-ff1c-4abc-ac8e-bbb5c484987f
date added to LUP
2019-01-01 14:49:41
date last changed
2019-01-02 16:23:07
@article{746d2326-ff1c-4abc-ac8e-bbb5c484987f,
  abstract     = {Time cannot be directly perceived; instead, its flow is inferred from the influx of sensory information. To prevent sensory overload, attentional mechanisms split up information into processable units. This portioning remains imperceptible to the individual. However, the length of these units still influences the speed of perception and the speed at which behaviors are performed. Previous studies have focused on establishing the length of these units in various mammalian species – mainly humans – by measuring different types of behaviors, including gaze. However, no such studies have been conducted on birds. We measured duration of ravens’ (Corvus corax) single gazes towards selectable objects before a choice was made, and compared it with humans in a similar set up. The raven gaze durations were approximately half those of humans (which fell slightly short of previously established ranges). We hypothesize that these differences are mainly due to the much higher so-called flicker-fusion-frequency in birds, which makes their vision faster in the sense that it picks up more information per time unit than mammalian vision does. We further discuss that the speed of perception might influence the general speed of cognitive processing in more complex tasks as well, and suggest that the addition of a temporal component in comparative cognitive studies might be informative.},
  author       = {Bobrowicz, Katarzyna and Osvath, Mathias},
  issn         = {2372-4323},
  keyword      = {time constant,raven,moment,temporal processing,cognition,visual perception},
  language     = {eng},
  month        = {12},
  publisher    = {Sciknow Publications Ltd.},
  series       = {Animal behavior and cognition},
  title        = {Cognition in the fast lane : ravens’ gazes are half as short as humans’ when choosing objects},
  year         = {2018},
}