ArticleAnimal cognition2021
Giraffes go for more: a quantity discrimination study in giraffes (Giraffa camelopardalis).
Article in Animal cognition, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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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.
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Who cites it
10 citing papers in PubMed.
- Assessing quantity combination and dissociation in giraffes.Scientific reports · 2026Article
- Group size affects spontaneous quantity discrimination performance in wild Western Australian magpies (Gymnorhina tibicen dorsalis).Animal cognition · 2025Article
- Monkeys overestimate connected arrays in a relative quantity task: A reverse connectedness illusion.Attention, perception & psychophysics · 2024Article
- Giraffes make decisions based on statistical information.Scientific reports · 2023Article
- Innovation across 13 ungulate species: problem solvers are less integrated in the social group and less neophobic.Proceedings. Biological sciences · 2023Article
- Rhesus Monkeys Have a Counting Ability and Can Count from One to Six.Brain sciences · 2021Article
- Comparative cognition in three understudied ungulate species: European bison, forest buffalos and giraffes.Frontiers in zoology · 2021Article
- Problem solving in European bison (Royal Society open science · 2021Article
- Neophobia in 10 ungulate species-a comparative approach.Behavioral ecology and sociobiology · 2021Article
- Response to intruder number is related to spontaneous quantity discrimination performance in a wild bird.Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Many species, including humans, rely on an ability to differentiate between quantities to make decisions about social relationships, territories, and food. This study is the first to investigate whether giraffes (Giraffa camelopardalis) are able to select the larger of two sets of quantities in different conditions, and how size and density affect these decisions. In Task 1, we presented five captive giraffes with two sets containing a different quantity of identical foods items. In Tasks 2 and 3, we also modified the size and density of the food reward distribution. The results showed that giraffes (i) can successfully make quantity judgments following Weber's law, (ii) can reliably rely on size to maximize their food income, and (iii) are more successful when comparing sparser than denser distributions. More studies on different taxa are needed to understand whether specific selective pressures have favored the evolution of these skills in certain taxa.
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Registered trials
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 OpenQuestion graph.