Am_Fear, I was part of a group study for the same project in the late 80's/early 90's. What they did was dressed dummies up, put them in various areas (woodland in our case), and we tried detecting them, first with no help (we walked a path), then with binos, then spotting scopes. There were several different types: the standard US camo pattern, tiger stripe, the british version, a variation on the german stuff, regular jungle fatigues similar to those worn in Viet Nam. Oddly, with my group, the most effective ones WE (didnt) see were the solid green jungle fatigues-they sort of blended in with everything. My unit was just randomly picked-we were just a regular infantry unit, nothing special. It was a neat learning experience though!