I make my students/operators call out the number of fingers I am holding up to their sides and rear, together with 'hidden' targets in the tree line or in a room that they must actually engage.
If they do not engage those hidden targets I can see that they are not properly
seeing while scanning, rather, they are simply "scanning" to appease me. If I see this, I will correct them immediately.
In this training exericse, after a vehicle ambush, I am showing my student how to properly clear the immediate area around the vehilce and due to worst case scenario, charge the attackers with little to no cover.
In keeping with my Israeli combat training doctrine, the scanning is done in a different way than is commonly taught in the USA. This is Israeli counter terror training. The scanning was fast but to the point.
http://www.youtube.com/watch?v=Qm7im7Ab36A