In everyday life we constantly perceive and discriminate between a large variety of sensory inputs, the far majority of which consists of more than one modality. We performed two experiments to investigate whether chickens use the information present in multimodal signals. To test whether audiovisual stimuli are better detected than visual or acoustic stimuli alone, we first measured the detection threshold with a staircase paradigm. We found that chickens were able to detect weaker stimuli using audiovisual stimuli. Next, we tested whether the multimodal nature of a stimulus also increases the discrimination between two stimuli by measuring the smallest difference that the animals could still distinguish from each other. We found that chickens can discriminate smaller differences using audiovisual stimuli in comparison to visual stimuli but not in comparison to acoustic stimuli. Thus, even in a generalist species such as the chicken, the benefits from multimodal integration are exploited for sensory processing.

This content is only available via PDF.

Article PDF first page preview

Article PDF first page preview