Limitations of Spatial Judgment Bias Test Application in Horses (Equus ferus caballus).
- Journal Article
Summary
The research article tries to assess the limitations of the spatial judgment bias test in horses. The test aims to evaluate horses’ affective states but the research shows it may be influenced by stress levels, personality traits, and test structure.
Objective
The primary objective of this research was to explore the potential limitations in applying a spatial judgment bias test (JBT) to horses. The researchers aimed to examine how factors such as stress level, personality traits, and the fundamental structure of the test itself could impact its application.
Methodology
- A total of 14 equines (10 horses and 4 ponies) were trained to distinguish between two positions — one rewarded (Positive) and one not rewarded (Negative).
- After this training, the researchers measured the latency (delay) for the equines to reach three unrewarded or ambiguous positions labelled as Near Positive, Middle, and Near Negative.
- The researchers also utilised the Equine Behavior Assessment and Research Questionnaire (E-BARQ) to assess the personality traits of the equines.
- The equines’ stress levels were inferred by measuring fecal and hair cortisol (a hormone associated with stress response) levels using Radioimmunoassay (RIA), and by recording the frequency of behavioural stress indicators.
Results
- Results from the tests indicated that equines who had the rewarded (Positive) position on their right side approached the Near Negative and Middle positions faster than those who had the Positive position on the left.
- Personality traits appeared to have some influence over the latency to reach the Middle and Near Positive positions, although chronic stress levels did not seem to affect the equines’ judgment bias.
Implications and Further Research
The preliminary study revealed several limitations in the use of spatial JBT for assessing affective states in equines. The researchers found that personality traits could partially influence the cognitive process. Areas identified for further investigation included the test structure itself and influences of stress levels on equines’ performance. The authors of the study recommended more research to refine the use of this test in horses, taking into account both the specific characteristics of the species and individual differences among horses.
Cite This Article
Publication
Researcher Affiliations
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064 Ozzano dell'Emilia, Italy.
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064 Ozzano dell'Emilia, Italy.
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064 Ozzano dell'Emilia, Italy.
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064 Ozzano dell'Emilia, Italy.
Conflict of Interest Statement
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Citations
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