Fig. 3.

The build up of amplitude and complexity of movement in zero-, one-, and two-dimensions space in a free BALB/c mouse. (A) Build up in the portion of body area (in pixels) extending out of doorway during Peep-and-hide. (B1–4): The build up of angular positions (θ) across roundtrips (amplitude and complexity). Note change of time scale from (B1) through (B4). Black line, borderline movements. Blue data points, cage skips. Positive values designate right and negative values left borderline directions. Red lines, angular positions of doorway at ±360°. Graph lines between x-axis and red line represent full circles. All graphs start with the same initial roundtrip, progressively incorporating later roundtrips. (B5) Emergence and build up of radial movement away from wall (in green), superimposed on the θ plot (in black). Significant radial movements (incursions) are added only after 1.5 h.