ArticlePeerJ2019
An attention bias test to assess anxiety states in laying hens.
Article in PeerJ, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
17 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Body surface temperatures as biomarkers of physiological environmental adaptation in wild birds and mammals.Biological reviews of the Cambridge Philosophical Society · 2026Pooled it
- Impacts of Enrichment Type (Hut vs. Platform) on Chronic Stress and Anxiety in Six Fast- and Slow-Growing Broiler Strains.Animals : an open access journal from MDPI · 2026Article
- Behavioural predictability in chickens in response to anxiogenic stimuli is influenced by maternal corticosterone levels during egg formation.Scientific reports · 2025Article
- Review
- Alleviating isolation stress in chickens: The benefits of home pen playback and mirrors.PloS one · 2025Article
- Environmental complexity impacts anxiety in broiler chickens depending on genetic strain and body weight.Scientific reports · 2024Article
- Resource choice during ontogeny enhances both the short- and longer-term welfare of laying hen pullets.Scientific reports · 2024Article
- Behaviours of farmed saltwater crocodiles (Frontiers in veterinary science · 2024Article
- Pharmacological validation of an attention bias test for conventional broiler chickens.PloS one · 2024Article
- Clicker Training as an Applied Refinement Measure in Chickens.Animals : an open access journal from MDPI · 2023Article
- Influence of Perch-Provision Timing on Anxiety and Fearfulness in Laying Hens.Animals : an open access journal from MDPI · 2023Article
- Social-pair judgment bias testing in slow-growing broiler chickens raised in low- or high-complexity environments.Scientific reports · 2023Article
- Effects of Housing System on Anxiety, Chronic Stress, Fear, and Immune Function in Bovan Brown Laying Hens.Animals : an open access journal from MDPI · 2022Article
- Effect of Environmental Complexity and Stocking Density on Fear and Anxiety in Broiler Chickens.Animals : an open access journal from MDPI · 2021Article
- Use of cognitive bias as a welfare tool in poultry.Journal of animal science · 2020Review
- Uninhibited chickens: ranging behaviour impacts motor self-regulation in free-range broiler chickens (Biology letters · 2020Article
- Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Fear is a response to a known threat, anxiety is a response to a perceived threat. Both of these affective states can be detrimental to animal welfare in modern housing environments. In comparison to the well-validated tests for assessing fear in laying hens, tests for measuring anxiety are less developed. Perception of a threat can result in an attention bias that may indicate anxious affective states in individual hens following playback of an alarm call. In Experiment 1, an attention bias test was applied to hens that differed in their range access to show that hens that never ranged were more vigilant (stretching of the neck and looking around:
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.