Fig. 3. Animals overshoot in orienting turns by approximately a factor of 4. (A) If animals were turning to position the stimulus in the center of their oral veil, then the angle of turn would relate to the stimulus locus according to the relationship: angle=arctan (xk/4), where k is the ratio of the oral veil width to the body length L (solid line without datapoints in B). (B) The relationship determined from data (solid line with data points, replotted from Fig. 2A) gives a slope 4 times steeper than the predicted relationship for k=0.3.