Cognitive bias tests provide a window into animal emotional states. In dogs, these tests reveal how housing, training, and social environments affect psychological wellbeing.
Cognitive bias testing offers something that observation alone cannot: insight into the subjective emotional experience of the animal. When a dog responds pessimistically to ambiguous situations — anticipating bad outcomes — this suggests a negative emotional state that represents real welfare compromise, even if the dog appears physically healthy. The research consistently shows that kenneled dogs, dogs trained with punishment, and dogs with inadequate social contact show more pessimistic biases. This provides scientific support for welfare recommendations around enrichment, positive training, and social housing. For shelters, cognitive bias testing could help identify dogs most in need of enrichment interventions and track welfare improvements over time. The field is moving from detecting welfare problems to using these tools to evaluate and improve welfare interventions.