Description of the tested horses clustered in two groups according to their bonds (Pair 1: Gina/Calippo; Pair 2: Julia/Betsie).

In addition to the information regarding sex, age, breed, test timing, we provided the color of the fur and the relative color of the mark (yellow or blue) that we selected in order to be clearly visible by both experimenters and tested horses.本次数据集除涵盖性别、年龄、品种及测试时间相关信息外，还提供了受试马匹的被毛颜色，以及我们为确保实验人员与受试马匹均可清晰辨识而选定的标记相对颜色（黄色或蓝色）。