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Fig. 9. Response of Drosophila (blue) to a velocity bias on two random-dot
backgrounds at different dampings. Amplitude response (left-minus-right) to a
low- (A; pattern shown in Fig.
1C) and high-contrast panorama (B; pattern shown in
Fig. 1D). (C) Mean values of
panorama velocity and (D) mean relative amplitude difference, both plotted as
a function of frictional damping coefficient. Data are mean values of entire
flight sequences using low- (red) and high (blue) contrast pattern and during
object orientation behaviour (black). Grey area indicates threshold range of
the visual system (cf. Materials and methods). For more details, see legend to
Fig. 4. Values are means
± s.e.m., N=24 (black), N=8 (red), and N=15
flies (blue).
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