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Home / Equine Research Bank / Anim Cogn / Visual laterality in the domestic horse (Equus caballus) int...
Animal cognition2009; 13(2); 229-238; doi: 10.1007/s10071-009-0260-x

Visual laterality in the domestic horse (Equus caballus) interacting with humans.

Abstract: Most horses have a side on which they are easier to handle and a direction they favour when working on a circle, and recent studies have suggested a correlation between emotion and visual laterality when horses observe inanimate objects. As such lateralisation could provide important clues regarding the horse's cognitive processes, we investigated whether horses also show laterality in association with people. We gave horses the choice of entering a chute to left or right, with and without the passive, non-interactive presence of a person unknown to them. The left eye was preferred for scanning under both conditions, but significantly more so when a person was present. Traditionally, riders handle horses only from the left, so we repeated the experiment with horses specifically trained on both sides. Again, there was a consistent preference for left eye scanning in the presence of a person, whether known to the horses or not. We also examined horses interacting with a person, using both traditionally and bilaterally trained horses. Both groups showed left eye preference for viewing the person, regardless of training and test procedure. For those horses tested under both passive and interactive conditions, the left eye was preferred significantly more during interaction. We suggest that most horses prefer to use their left eye for assessment and evaluation, and that there is an emotional aspect to the choice which may be positive or negative, depending on the circumstances. We believe these results have important practical implications and that emotional laterality should be taken into account in training methods.
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Publication Date: 2009-07-17 PubMed ID: 19618222DOI: 10.1007/s10071-009-0260-xGoogle Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article discusses a study conducted on domestic horses (Equus caballus) to investigate their preference for using the left eye while assessing and evaluating their environment, particularly when humans are present. This phenomenon, known as visual laterality, suggests an emotional aspect to horses’ cognitive processes and significantly influences their behaviour during training.

Objective and Methodology

  • The main aim of this study was to explore the visual laterality in horses when they are in association with humans.
  • The researchers created two scenarios – one where the horse had a choice to enter a chute to the left or right without a human present, and one where a person was present.
  • The study was repeated with horses that were specifically trained on both sides, as traditionally, riders handle horses only from the left side.
  • The research also examined horses interacting with known and unknown humans, using traditionally and bilaterally trained horses.

Findings and Interpretations

  • The findings showed that regardless of the scenario or training received, horses showed a consistent preference for using their left eye when a human was present.
  • When given a choice to go left or right, horses preferred to use their left eye to scan the environment, whether or not a person was present – though the preference was significantly stronger when a human was present.
  • When interacting with a human, whether known or unknown, horses were more likely to use their left eye than the right.
  • The researchers suggest that there might be an emotional aspect to this choice – it could be positive or negative, depending on the circumstances.

Implications and Recommendations

  • The results from this study provide insights into the cognitive processes of horses in relation to visual laterality. This could be a crucial aspect to consider in the training methods for horses.
  • The finding that horses predominantly prefer the left eye for assessment and evaluation implies that this preference should be considered during interaction and training sessions.
  • The study recommends that further research is needed to understand the emotional factors contributing to this visual laterality and how it can be used to enhance horse training methodologies.

Cite This Article

APA
Farmer K, Krueger K, Byrne RW. (2009). Visual laterality in the domestic horse (Equus caballus) interacting with humans. Anim Cogn, 13(2), 229-238. https://doi.org/10.1007/s10071-009-0260-x

Publication

Animal cognition
ISSN: 1435-9456
NlmUniqueID: 9814573
Country: Germany
Language: English
Volume: 13
Issue: 2
Pages: 229-238

Researcher Affiliations

Farmer, Kate
  • Centre for Social Learning and Cognitive Evolution, School of Psychology, University of St Andrews, St Andrews, Fife, Scotland, UK.
Krueger, Konstanze
    Byrne, Richard W

      MeSH Terms

      • Animal Communication
      • Animals
      • Eye Movements
      • Female
      • Functional Laterality
      • Horses / psychology
      • Humans
      • Learning
      • Male
      • Visual Fields
      • Visual Perception

      Citations

      This article has been cited 33 times.
      1. Lyamin OI, Borshchenko VD, Siegel JM. A 108-h total sleep deprivation did not impair fur seal performance in delayed matching to sample task. J Comp Physiol B 2023 Aug 18;.
        doi: 10.1007/s00360-023-01511-7pubmed: 37596419google scholar: lookup
      2. Schubert CL, Ryckewaert B, Pereira C, Matsuzawa T. Garrano Horses Perceive Letters of the Alphabet on a Touchscreen System: A Pilot Study. Animals (Basel) 2022 Dec 12;12(24).
        doi: 10.3390/ani12243514pubmed: 36552434google scholar: lookup
      3. Marliani G, Vannucchi I, Kiumurgis I, Accorsi PA. Limitations of Spatial Judgment Bias Test Application in Horses (Equus ferus caballus). Animals (Basel) 2022 Nov 3;12(21).
        doi: 10.3390/ani12213014pubmed: 36359138google scholar: lookup
      4. Krueger K, Schwarz S, Marr I, Farmer K. Laterality in Horse Training: Psychological and Physical Balance and Coordination and Strength Rather Than Straightness. Animals (Basel) 2022 Apr 16;12(8).
        doi: 10.3390/ani12081042pubmed: 35454288google scholar: lookup
      5. Schwarz S, Marr I, Farmer K, Graf K, Stefanski V, Krueger K. Does Carrying a Rider Change Motor and Sensory Laterality in Horses?. Animals (Basel) 2022 Apr 12;12(8).
        doi: 10.3390/ani12080992pubmed: 35454239google scholar: lookup
      6. Baragli P, Scopa C, Felici M, Reddon AR. Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus. PLoS One 2021;16(8):e0255688.
        doi: 10.1371/journal.pone.0255688pubmed: 34351986google scholar: lookup
      7. MacKechnie-Guire R, Pfau T. Differential rotational movement and symmetry values of the thoracolumbosacral region in high-level dressage horses when trotting. PLoS One 2021;16(5):e0251144.
        doi: 10.1371/journal.pone.0251144pubmed: 33956858google scholar: lookup
      8. Bitschi ML, Bagó Z, Rosati M, Reese S, Goehring LS, Matiasek K. A Systematic Approach to Dissection of the Equine Brain-Evaluation of a Species-Adapted Protocol for Beginners and Experts. Front Neuroanat 2020;14:614929.
        doi: 10.3389/fnana.2020.614929pubmed: 33390909google scholar: lookup
      9. Rørvang MV, Nielsen BL, McLean AN. Sensory Abilities of Horses and Their Importance for Equitation Science. Front Vet Sci 2020;7:633.
        doi: 10.3389/fvets.2020.00633pubmed: 33033724google scholar: lookup
      10. Marr I, Preisler V, Farmer K, Stefanski V, Krueger K. Non-invasive stress evaluation in domestic horses (Equus caballus): impact of housing conditions on sensory laterality and immunoglobulin A. R Soc Open Sci 2020 Feb;7(2):191994.
        doi: 10.1098/rsos.191994pubmed: 32257351google scholar: lookup
      11. Johnson PJ, Janvier V, Luh WM, FitzMaurice M, Southard T, Barry EF. Equine Stereotaxtic Population Average Brain Atlas With Neuroanatomic Correlation. Front Neuroanat 2019;13:89.
        doi: 10.3389/fnana.2019.00089pubmed: 31636547google scholar: lookup
      12. Robins A, Berthoux G, Santurtun E, Navarro G, Phillips CJC. Sheep Quickstep while the Floor Rock and Rolls: Visuomotor Lateralization during Simulated Sea Travel. Animals (Basel) 2019 Sep 18;9(9).
        doi: 10.3390/ani9090700pubmed: 31540547google scholar: lookup
      13. Robins A. The Alpha Hypothesis: Did Lateralized Cattle-Human Interactions Change the Script for Western Culture?. Animals (Basel) 2019 Aug 31;9(9).
        doi: 10.3390/ani9090638pubmed: 31480488google scholar: lookup
      14. Marr I, Farmer K, Krüger K. Evidence for Right-Sided Horses Being More Optimistic than Left-Sided Horses. Animals (Basel) 2018 Nov 22;8(12).
        doi: 10.3390/ani8120219pubmed: 30469484google scholar: lookup
      15. Raoult CMC, Gygax L. Valence and Intensity of Video Stimuli of Dogs and Conspecifics in Sheep: Approach-Avoidance, Operant Response, and Attention. Animals (Basel) 2018 Jul 17;8(7).
        doi: 10.3390/ani8070121pubmed: 30018237google scholar: lookup
      16. Farmer K, Krüger K, Byrne RW, Marr I. Sensory laterality in affiliative interactions in domestic horses and ponies (Equus caballus). Anim Cogn 2018 Sep;21(5):631-637.
        doi: 10.1007/s10071-018-1196-9pubmed: 29948296google scholar: lookup
      17. Kappel S, Mendl MT, Barrett DC, Murrell JC, Whay HR. Lateralized behaviour as indicator of affective state in dairy cows. PLoS One 2017;12(9):e0184933.
        doi: 10.1371/journal.pone.0184933pubmed: 28910416google scholar: lookup
      18. Von Zup M, Lassaline M, Kass PH, Miller PE, Thomasy SM. Effects of 0.2% brimonidine and 0.2% brimonidine-0.5% timolol on intraocular pressure and pupil size in normal equine eyes. Equine Vet J 2017 Nov;49(6):810-814.
        doi: 10.1111/evj.12695pubmed: 28470857google scholar: lookup
      19. Wathan J, Proops L, Grounds K, McComb K. Horses discriminate between facial expressions of conspecifics. Sci Rep 2016 Dec 20;6:38322.
        doi: 10.1038/srep38322pubmed: 27995958google scholar: lookup
      20. Hintze S, Smith S, Patt A, Bachmann I, Würbel H. Are Eyes a Mirror of the Soul? What Eye Wrinkles Reveal about a Horse's Emotional State. PLoS One 2016;11(10):e0164017.
        doi: 10.1371/journal.pone.0164017pubmed: 27732647google scholar: lookup
      21. Rhodin M, Roepstorff L, French A, Keegan KG, Pfau T, Egenvall A. Head and pelvic movement asymmetry during lungeing in horses with symmetrical movement on the straight. Equine Vet J 2016 May;48(3):315-20.
        doi: 10.1111/evj.12446pubmed: 25808700google scholar: lookup
      22. Lindell AK. Continuities in emotion lateralization in human and non-human primates. Front Hum Neurosci 2013;7:464.
        doi: 10.3389/fnhum.2013.00464pubmed: 23964230google scholar: lookup
      23. Proops L, Rayner J, Taylor AM, McComb K. The Responses of Young Domestic Horses to Human-Given Cues. PLoS One 2013;8(6):e67000.
        doi: 10.1371/journal.pone.0067000pubmed: 23840572google scholar: lookup
      24. Proops L, McComb K. Cross-modal individual recognition in domestic horses (Equus caballus) extends to familiar humans. Proc Biol Sci 2012 Aug 22;279(1741):3131-8.
        doi: 10.1098/rspb.2012.0626pubmed: 22593108google scholar: lookup
      25. Blois-Heulin C, Crével M, Böye M, Lemasson A. Visual laterality in dolphins: importance of the familiarity of stimuli. BMC Neurosci 2012 Jan 12;13:9.
        doi: 10.1186/1471-2202-13-9pubmed: 22239860google scholar: lookup
      26. de Boyer des Roches A, Durier V, Richard-Yris MA, Blois-Heulin C, Ezzaouïa M, Hausberger M, Henry S. Differential outcomes of unilateral interferences at birth. Biol Lett 2011 Apr 23;7(2):177-80.
        doi: 10.1098/rsbl.2010.0979pubmed: 21084335google scholar: lookup
      27. Roth LSV, McGreevy P. Horse vision through two lenses: Tinbergen's Four Questions and the Five Domains. Front Vet Sci 2025;12:1647911.
        doi: 10.3389/fvets.2025.1647911pubmed: 40895790google scholar: lookup
      28. MacKechnie-Guire R, Clayton H, Byström A, Marlin D, Haussler K, Latif S, Blum N, le Jeune SS, Wanless M, Egenvall A. International Survey Exploring Rider-Perceived Sidedness of the Horse. Animals (Basel) 2025 Jul 2;15(13).
        doi: 10.3390/ani15131956pubmed: 40646855google scholar: lookup
      29. Haussler KK, le Jeune SS, MacKechnie-Guire R, Latif SN, Clayton HM. The Challenge of Defining Laterality in Horses: Is It Laterality or Just Asymmetry?. Animals (Basel) 2025 Jan 21;15(3).
        doi: 10.3390/ani15030288pubmed: 39943060google scholar: lookup
      30. Barrera G, Albiach-Serrano A, Guillén-Salazar F. Exploring horses' (Equus caballus) gaze and asymmetric ear position in relation to human attentional cues. Anim Cogn 2024 Oct 22;27(1):67.
        doi: 10.1007/s10071-024-01909-ypubmed: 39436472google scholar: lookup
      31. Forbes B, Ho W, Parkes RSV, Sepulveda Caviedes MF, Pfau T, Martel DR. Associations between Racing Thoroughbred Movement Asymmetries and Racing and Training Direction. Animals (Basel) 2024 Apr 3;14(7).
        doi: 10.3390/ani14071086pubmed: 38612325google scholar: lookup
      32. Gainotti G. Mainly Visual Aspects of Emotional Laterality in Cognitively Developed and Highly Social Mammals-A Systematic Review. Brain Sci 2024 Jan 5;14(1).
        doi: 10.3390/brainsci14010052pubmed: 38248267google scholar: lookup
      33. Goma AA, Uddin J, Kieson E. Lateralised Behavioural Responses in Livestock to Environmental Stressors: Implications for Using Infrared Thermography to Assess Welfare Conditions. Animals (Basel) 2023 Nov 27;13(23).
        doi: 10.3390/ani13233663pubmed: 38067014google scholar: lookup
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