Design Multicentre, prospective, covert observational study.
Importantly, although finger movements are probably well established in the observers' motor repertoire, covert motor activation was stronger during the pause intervals than during actual action observation.
As the observer becomes the observed, the performance explores the deepening layers of covert surveillance, morphing data acquisition into visual beauty and questioning the fine line between the viewer and the voyeur.
Using our method, we can better test whether ads and menus are normally available at a glance when fixating the center of a web page, instead of testing how well observers can deploy overt or covert attentional mechanisms.
Note in Fig. 12 that the random switching rule adds to the system a variable (however, controlled and stable) behavior, which could reduce the ability of a human observer to detect slight manipulations caused by a physically covert attack.
In this case, it is reasonable to consider that the variations caused by the switching controller will not significantly contribute for the poor perception of malicious and covert interferences that would naturally not be perceived by a human observer (even when a non-switching controller is used).
More neutral observers agree that while Syria may indeed be fighting a covert struggle to defend its soft underbelly, the Syrians are unlikely to control any but a few of the varied groups seeking to undermine the Lebanese government.
Some observers, meanwhile, have expressed surprise at Moscow's takeover of Crimea and its covert invasion of eastern Ukraine.
Observers fear the bomb attacks in Thailand, India and Georgia are the latest acts in a covert war between Israel and Iran over the Islamic republic's nuclear ambitions.
In everyday life, observers almost never actively mirror movements of the people they observe which implies that the activity produced by the mirror neuron system in response to action observation has to be actively and continuously inhibited to prevent generation of covert movements.
