Rudism,
The anticipation explanation would predict a steady rise in window visits by the dog - not a sudden spike prior to arrival. Given enough data, these two situations should be distinguishable by eye or standard signal processing operations.
From anecdotal accounts (and it is a frequently observed phenomenon) I don't think a steadily rising anticipation fits.
A graph of P(window visit within 5 mins) against time from return home summed over all experiments (of different total duration) might be interesting.
David |