Answer:
In psychology, parallel processing refers to the condition when the brain is processing more than one stimulus at the same time.
When people watching their dogs at a dog park, the majority of them do not focus their attention solely to their dogs.
Many dog owners actually interacted / talking with one another while casually observing their dogs with the corner of their eyes. In this activity, dog owners are processing more than one stimulus. Stimulus that come from their conversation with other owners and stimulus that come from their vision toward their dogs.
