div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: 北海道大学行動科学講座 心と社会の相互関係を科学する · CSm ember 1 2008 19 HDL Reciprocity cooperation and fairness: What is unique to human and why src=https:reader034vdocumentspubreader034viewer20220505175fa18a77d3afe317c203e513html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: 北海道大学行動科学講座 心と社会の相互関係を科学する · CSm ember 1 2008 19 HDL Reciprocity cooperation and fairness: What is unique to human and why src=https:reader034vdocumentspubreader034viewer20220505175fa18a77d3afe317c203e513html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: 北海道大学行動科学講座 心と社会の相互関係を科学する · CSm ember 1 2008 19 HDL Reciprocity cooperation and fairness: What is unique to human and why src=https:reader034vdocumentspubreader034viewer20220505175fa18a77d3afe317c203e513html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: 北海道大学行動科学講座 心と社会の相互関係を科学する · CSm ember 1 2008 19 HDL Reciprocity cooperation and fairness: What is unique to human and why src=https:reader034vdocumentspubreader034viewer20220505175fa18a77d3afe317c203e513html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdiv