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A comparison of association indices

A comparison of association indices,10.1016/S0003-3472(87)80018-0,Animal Behaviour,S. J. Cairns,S. J. Schwager

A comparison of association indices   (Citations: 146)
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Journal: Animal Behaviour - ANIM BEHAV , vol. 35, no. 5, pp. 1454-1469, 1987
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    • ...Three social networks were built for each group for each year based on matrices of: 1) association, 2) grooming interactions, and 3) aggressive interactions. In the association network a connection, or tie, existed between any two individuals who were observed associated as defined above. These ties were weighted based on that dyad's halfweight coefficient, which is a commonly used measure of association. The halfweight coefficient is essentially a corrected ratio that accounts for differences in sighting frequency or sampling effort by comparing the number of times individuals were seen together to the number of times they were seen in total and is calculated as X/X+0.5(Ya+Yb)+Yab where X = number of times individuals a and b were observed together, Ya is the number of observations where a was observed without b, Yb is the number of observations in which b was observed without a, and Yab is the number of observations a and b were both observed, but in separate groups ...

    Ben T. Hirschet al. Kinship Shapes Affiliative Social Networks but Not Aggression in Ring-...

    • ...To determine if group stability varied as a result of habitat removal, we first calculated the simple ratio association index ...

    Gloriana Chaverriet al. Response of a Specialist Bat to the Loss of a Critical Resource

    • ...We used an association index to control for individual differences in sociality (Carins and Schwager 1987)...

    Ming Xueet al. Food Transfer in Sichuan Snub-nosed Monkeys ( Rhinopithecus roxellana ...

    • ...In situations where there is a sampling bias such that it is more likely that two individuals will be recorded in a given census if they are in separate groups, for example, then the half-weight index may help to compensate by weighting separate group observations at half the weight of other observations (Cairns and Schwager 1987)...
    • ...More detail can be found in papers by Cairns and Schwager (1987); Ginsberg and Young (1992); Bejder et al. (1998); Whitehead (1999); and Whitehead and Dufault (1999)...

    Daniel W. Frankset al. Sampling animal association networks with the gambit of the group

    • ...To determine patterns of association among individuals, I used the simple ratio association index (Cairns and Schwager 1987 ;G insberg and Young1992)...

    Gloriana Chaverri. Comparative social network analysis in a leaf-roosting bat

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