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. 2012 Apr 18;279(1740):2930–2935. doi: 10.1098/rspb.2011.2614

Table 1.

Total transferred per period by participants (GEE; n = 1912 observations on 96 participants).

parameter B significance
intercept −1.134 0.001
period −0.236 0.007
low variance (LV) −0.378 0.324
high variance (HV) 0
group size 0.140 0.007
female 0.058 0.812
male 0
amount captured (AC) 0.097 0.005
LV × AC −0.022 0.741
HV × AC 0
period × AC 0.029 0.000
female × AC 0.020 0.769
male × AC 0
LV × period × AC −0.033 0.000
HV × period × AC 0
female × period × AC −0.015 0.003
male × period × AC 0
LV × female × period × AC 0.010 0.005
LV × male × period × AC 0
HV × female × period × AC 0
HV × male × period × AC 0
period squared −0.013 0.004
LV × period squared 0.005 0.003
HV × period squared 0
(scale) 19.03