Sensory cues have to be quite outstanding to capture the person's attention. If there is too much information present, the person may seem overwhelmed. Pictures which are "too busy" maybe ignored. A single subject with fairly bland colors may capture the person's attention better.
Strong smells do capture the person's attention. Hot and cold contrast also captures the person's attention. Taking the person for a walk outside in a different temperature also captures the person's attention.
The person pays attention to listening to sounds for a limited period of about a minute.
One piece of information may be conveyed at a time.