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Fig. 6. Assessment of whether DCMD habituation was the same for repeated
presentations of a `locust' (black bars) and `bird' (open bars). The value of
the 30th (habituated) approach was normalized to the first approach. Values
are means ± S.D. A two-way ANOVA revealed that the object
size or trajectory did not affect the peak spike rate. A `locust' approaching
from 0° azimuth resulted in a greater decrease of the instantaneous spike
rate 200 ms before collision than did a `bird' from the same trajectory or a
`locust' approaching from ±45° azimuth (see text for statistical
parameters; bars with the same letters were not statistically different,
N=9). Comparisons were made within each graph.
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