I'm working on a driving simulator that uses an eyetracker to monitor the users gaze behavior. Based on a study I modeled an optimal scanpath that the users should follow in order to best maneuver through curves. If the users gaze hasn't hit certain AoIs in time, a visual cue is being shown to manipulate the user to include this point in his scanpath.
My question is, should I explain the meaning of the cues and the system behind them to the testers? Wouldn't that bias their scanning behavior?