The effect of stimulus height on visual discrimination in horses.

This research explored how the height at which visual stimuli are presented impacts a horse’s ability to perform a simple discrimination task, finding that horses performed better when the stimuli were at ground level.

Study Design and Methodology

• The study’s objective was to determine how the height of visual stimulus impacts a horse’s ability to learn a simple visual discrimination task. This was assessed using a two-choice discrimination task utilizing black-and-white visual cues.
• The researchers enlisted the participation of eight horses in this study. Each horse was trained to distinguish between the black and white colours, which was presented at either ground level or at 70 cm above the ground.
• The training sessions alternated the heights at which the stimuli were presented. However, within each individual session, the height was kept consistent. The study defined the learning criterion as four consecutive sessions in which the horse achieved a 70% accuracy in responses.

Key Findings

• The researchers discovered that horses performed better when the stimuli were presented at ground level. This was measured by the fewer number of trials needed to reach the 70% accuracy criterion, a higher percentage of correct initial decisions, and fewer repeated errors. All these parameters significantly differed when compared to the visual stimuli presented at 70 cm above the ground.
• The findings imply that trainers could enhance horses’ learning of visual discrimination tasks by placing the stimuli on the ground.

Implications

• The study’s results suggest that the visual characteristics of ground surfaces play a crucial role in horse management and training. The results may be useful for trainers and horse managers to optimize learning and training methods.