Yes, I noticed that too, on the table, rowan.
Mine are effectively a 'pack', so they act differently to the study dogs - the youngest keeps trying to push her way up the chain, the 'boss' lets her do some things if it suits, but takes the lead in important things.
And the breed has traditionally been kept indoors (or in Chums, really) so they're reactions are possibly different to some anyway.
The youngest is very bright - the people who bought her initially only kept her for a month ;(
Nice that they used pets for the study, 'though!