Experimental apparatus of a place preference.

<p>A place preference apparatus with a mirror, a video-recorded image of a rat, or a still image of a rat at one end. (A) Photograph of the apparatus showing the central compartment and two side chambers. (B) Tracings of the actual route one individual travelled over a 10 min period. (C) Diagram of the setup for each of the preference tests: (a) normal, (b) mirror, (c) video-recorded image, and (d) still image. Arrows indicate the position of black panel, a mirror, a video-recorded image of a rat, or a still image.