Dogs may have 'personalities' which guide their television viewing habits -- an anxious dog might respond more to cars or a doorbell sound, while an excitable one is more likely to follow on-screen objects, a study has found.

Researchers from Auburn University, US, also found that pet dogs may perceive two-dimensional objects on the TV screen in a manner similar to those in the three-dimensional environment.

The results, published in the journal Scientific Reports, help understand a pet dog's internal, perceptual experience and may inform interventions taken towards their welfare.