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Fig. 2. Diagram of experimental arrangement as viewed from above (top) and
potential landing points as viewed laterally and perpendicularly to the array
of sheets (bottom). The null frequency of contact with a sheet is a function
of distance from the drop point (P) to its landing position (A–E).
Relative to the most direct path (i.e. from P to C), the distance from P to A
or to E is 5.1% greater, and from P to B or to D is 1.3% greater. Thus, the
proportions used to calculate null frequencies for G-tests were:
0.195 (landing points A and E), 0.203 (landing points B and D) and 0.205
(landing point C).
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