contiguity

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The test on contiguities (hypothesis 2) reveals a significant difference from random expectation only for the entire assemblage, in which the observed number of contiguities exceeds the expected one (P = 0.
At the community level, the three "competition parameters" exhibit no significant deviations in support of Whittaker's model 2: the numbers of contiguities never significantly exceed random expectation, and proportions of significantly small partial overlaps are low in all groups except the stream-independent amphibians.
Congeners of the stream-dependent amphibians exhibit no contiguities or significantly small partial overlaps, and most of the significantly large partial overlaps among congeners were found within this group (genera Petropedetes, Leptopelis, and Astylosternus).
Behavior on the modified recycling conjunctive schedule reflects the combined effects of accidental contiguities (between any behavior and reinforcer delivery) and programmed contiguities (between the selected operant and reinforcer delivery) within the context of a system that does not arrange contiguous reinforcement for extended pausing (as would be the case on a FI schedule) and which arranges reinforcement (albeit delayed) for responding during the FT component.
The number of 1-s delays ranged between 8 and 47, the number of programmed contiguities ranged between 1 and 17, and the number of accidental contiguities ranged between 0 and 17.
The number of 1-s delays ranged between 4 and 24, the number of programmed contiguities ranged between 0 and 12, and the number of accidental contiguities ranged between 0 and 8.