Cooperation is an important part of living in a society and much research has been done to investigate the factors that promote cooperation between individuals. These studies report that...Show moreCooperation is an important part of living in a society and much research has been done to investigate the factors that promote cooperation between individuals. These studies report that cooperation could be influenced by factors like emotional facial expressions of happiness, and embarrassment, however, these are more for the adult population, and not enough for children. This study aimed to investigate the role of gender (boys and girls) as well as facial expressions of positive affect and embarrassment in the cooperative choices of children. To achieve these three hypotheses were drawn. Hypothesis one was cooperation would be higher among females than males. With the gender of the dyads randomized. Hypothesis two was, cooperation will be more when there are higher levels of positive affect. Hypothesis three was, cooperation will be more when there are higher levels of embarrassment. The participants were dyads of N = 80 children with ages ranging from 8 to 12 years old. They all performed an introduction task where half of them were asked to introduce themselves face-to-face and the other half with a black screen between them, thereby creating two visibility conditions: invisible and visible. Afterward, they played the modified version one-shot prisoner’s dilemma game. A chi-square test of independence was used to analyze hypothesis one. The results showed that there was no significant difference in cooperation between boys and girls, χ2 (1, N = 80) = .189, p = .664. A binomial logistic regression was used to analyze hypotheses two and three. The result showed that increased positive affect and embarrassment had no significant influence on the cooperative choices of children, with positive affect B=.05 SE=.18 OR = 1.06, p = .772 95% CI = [.74, 1.15] and embarrassment B=.05 SE=.07 OR = 1.05, p = .494, 95% CI = [0.91, 1.20] Therefore, it was concluded that although the results did not support the hypotheses, there may be several factors that could contribute to this, such as this study being done in real-life face-to-face settings versus the previous studies done with computer simulations or manipulations. Keywords: cooperation, emotional facial expression, positive affect, embarrassment, gender.Show less