The Jedi must be touching the target to use this power. In combat, this means making a successful brawling roll in the same round that the power is to be used.
If the power is successfully activated, the target’s thought processes are numbed, making him calm and relaxed. He is not, however, under any sort of mind control and will eventually build up his anxieties or anger again if he sees reason for it and the Jedi cannot keep him calm. In addition to this effect, additional success in the alter roll further numbs the target’s mind, making him sluggish and possibly knocking him out. Before rolling, the Jedi may choose to use less than his full alter score if he fears “overdoing” the power.