Distributions of Allocated Sticker Charts in Two Subsamples.

<p>Distributions of Allocated Sticker Charts in Two Subsamples.</p

Frequencies of AVPR1A RS3 Promoter Region Repeat Alleles, in a Sample of 136 Twins and 162 Parents.

<p>Frequencies of AVPR1A RS3 Promoter Region Repeat Alleles, in a Sample of 136 Twins and 162 Parents.</p

The effect of AVPR1A RS3 ‘target allele’ on allocations in the DG.

<p>Percentage of children according to the number of sticker charts allocated in the DG (0, 1 or 2 and more), and the presence/absence of the ‘target allele’. Compared with non carriers, carriers are much less likely to allocate more than 2 sticker charts, and more likely to allocate nothing.</p

Association between <i>OXTR</i> haplotypes and allocation of funds in the Dictator Game (high versus low allocators) and Social Value Orientations. Haplotypes are indicated in outlined blocks.

<p>¹ UNPHASED global p-value, additive model ² UNPHASED permutation test for the haplotype block ³ PBAT multi-variate statistic, dominant model.</p

Association between OXTR SNPs and allocation of funds in the Dictator Game (high versus low allocators) and SVO

<p>DG = Dictator Game, categorized as high (> = 25) and low (<25) allocators.</p><p>SVO = Social Value Orientation, categorized as prosocial vs proself orientations.</p

Visual schematic of the oxytocin receptor.

<p>Schematic representation of chromosome 3 and the oxytocin receptor (OXTR) gene with the location of the 16 tagging single-nucleotide polymorphisms (SNPs).</p

Cross tabulation of Dictator and SVO allocation of funds.

<p>Cross tabulation of Dictator giving with Social Value Orientation (SVO). High givers in the DG were significantly more likely to maintain prosocial value orientations as compared to low givers.</p

Social Value Orientation Example Task

<p>Based on this example, if you were to select:</p><p>‘A’ you would receive 500 points = 5 and the “other” would receive 100 points = to 1</p><p>‘B’ you would receive 500 points = 5 and the “other” would receive 500 points = to 5</p><p>‘C’ you would receive 550 points = 5.5 and the “other” would receive 300 points = to 3</p

Distribution of Dictator allocations for student and mother samples.

<p>Allocation sums by participants grouped in 5 increments ( 5≈$1.17). For both samples, the modal value of 25 was used as the cutoff point to divide participants into low and high allocators.</p

Comparison of SVO Prosocial Responses by OXTR SNPs.

<p>Average number of prosocial responses in the Social Value Orientation task categorized by the three most significant OXTR SNPs. A family-based analysis for the three SNPs showed significant association with prosocial value orientations (PBAT dominant model: rs1042778 p = 0.001, rs2268490 p = 0.011, and rs237887 p = 0.005).</p