Brightness Discrimination in Budgerigars (Melopsittacus undulatus)
(2013) In PLoS ONE 8(1).- Abstract
- Birds have excellent spatial acuity and colour vision compared to other vertebrates while spatial contrast sensitivity is relatively poor for unknown reasons. Contrast sensitivity describes the detection of gratings of varying spatial frequency. It is unclear whether bird brightness discrimination between large uniform fields is poor as well. Here we show that budgerigars (Melopsittacus undulatus) need a Michelson contrast of 0.09 to discriminate between large spatially separated achromatic fields in bright light conditions. This is similar to the peak contrast sensitivity of 10.2 (0.098 Michelson contrast) for achromatic grating stimuli established in earlier studies. The brightness discrimination threshold described in Weber fractions is... (More)
- Birds have excellent spatial acuity and colour vision compared to other vertebrates while spatial contrast sensitivity is relatively poor for unknown reasons. Contrast sensitivity describes the detection of gratings of varying spatial frequency. It is unclear whether bird brightness discrimination between large uniform fields is poor as well. Here we show that budgerigars (Melopsittacus undulatus) need a Michelson contrast of 0.09 to discriminate between large spatially separated achromatic fields in bright light conditions. This is similar to the peak contrast sensitivity of 10.2 (0.098 Michelson contrast) for achromatic grating stimuli established in earlier studies. The brightness discrimination threshold described in Weber fractions is 0.18, which is modest compared to other vertebrates. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3405036
- author
- Lind, Olle LU ; Karlsson, Sandra and Kelber, Almut LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Vision Budgerigars Brightness discrimination
- in
- PLoS ONE
- volume
- 8
- issue
- 1
- article number
- e54650
- publisher
- Public Library of Science (PLoS)
- external identifiers
-
- wos:000313872800069
- pmid:23349946
- scopus:84872515917
- pmid:23349946
- ISSN
- 1932-6203
- DOI
- 10.1371/journal.pone.0054650
- language
- English
- LU publication?
- yes
- id
- 831102ac-2647-4bec-9bfc-c76590fd364e (old id 3405036)
- date added to LUP
- 2016-04-01 15:04:19
- date last changed
- 2022-04-06 22:03:04
@article{831102ac-2647-4bec-9bfc-c76590fd364e,
abstract = {{Birds have excellent spatial acuity and colour vision compared to other vertebrates while spatial contrast sensitivity is relatively poor for unknown reasons. Contrast sensitivity describes the detection of gratings of varying spatial frequency. It is unclear whether bird brightness discrimination between large uniform fields is poor as well. Here we show that budgerigars (Melopsittacus undulatus) need a Michelson contrast of 0.09 to discriminate between large spatially separated achromatic fields in bright light conditions. This is similar to the peak contrast sensitivity of 10.2 (0.098 Michelson contrast) for achromatic grating stimuli established in earlier studies. The brightness discrimination threshold described in Weber fractions is 0.18, which is modest compared to other vertebrates.}},
author = {{Lind, Olle and Karlsson, Sandra and Kelber, Almut}},
issn = {{1932-6203}},
keywords = {{Vision Budgerigars Brightness discrimination}},
language = {{eng}},
number = {{1}},
publisher = {{Public Library of Science (PLoS)}},
series = {{PLoS ONE}},
title = {{Brightness Discrimination in Budgerigars (Melopsittacus undulatus)}},
url = {{http://dx.doi.org/10.1371/journal.pone.0054650}},
doi = {{10.1371/journal.pone.0054650}},
volume = {{8}},
year = {{2013}},
}