In the following behaviour, the light body is very reactive and cannot engage in the rich reciprocal interplay of attraction and escape, as is the case in the explorative behaviour: it only follows. The hypothesis is that people will feel more involved in the explorative condition than in the following condition. In the active behaviour, the light body explores the space rather than the person. As in the explorative behaviour, the light body focuses more directly on the person, the hypothesis is that the person feels more involved in the explorative condition than in the active condition. When PeP+ behaves exploratively, the play of attraction and escape can happen; perceptual crossing can happen. The experience of this active interplay of perceiving and being perceived shows when participants feel that they can attract the light body, but that the light body also sets out to lure them in following it.