In this study we aimed to systematically explore how reward influences children’s compassionate responding. Green et al. [12] gave children their stickers at the end of all three tasks. In this way, children may have been extrinsically rewarded by the stickers, decreasing their intrinsic motivation to help [27]. To explore this, we examined how an immediate reward (after each task) and no reward (although children still received stickers at the end of the entire experiment for their participation but they did not know this) would influence children’s responding compared to the cost condition adapted from the Green et al. [12] study. Notably, the no reward tests children’s propensity to help in the absence of external reward. By contrast, children in the immediate reward condition received their sticker during the task, while the (slow) puppet was still finishing. This meant that that they could help without losing their reward, thereby allowing us to isolate the role of reward in this paradigm. We predicted that the removal of the cost (no reward and immediate reward) would facilitate compassionate responding by children. Additionally, Green et al. [12] observed that children who did not help either consoled or disengaged from the puppet. Therefore, this experiment also examined these behaviours as an exploratory addition to the study.
Method
All participants were recruited through local childcare centers or a database of parents who had previously agreed to participate in research at a local university. Participation took place either at the childcare center or in a dedicated child-friendly testing space at the local university. Informed consent was provided by the parents for all participants. An online randomizer (https://www.randomizer.org/) was used to allocate child to condition. Once the session began, children were introduced to the puppet/adult and the experimenter explained the rules of the task. The task only began after children indicated that they understood the task. Upon completion of the task, children and caregivers were thanked and children who participated at the university were offered a reward as a thank you for participating. This procedure was the same for this and all other studies in this paper.
In this study we adapted the cost condition from the original paradigm [12], where the child had insufficient pieces to help the puppet and would, thus, have to give up a reward to act compassionately. In addition to this baseline (cost), we included two additional conditions: one where children did not receive any stickers during the game (no reward) and one where children received a reward after each task instead of at the end of all three (reward immediate condition). Notably, when the puppet was distressed in the no reward condition, they did not refer to the sticker in their distress prompt—instead saying “Oh no… I don’t have enough <task pieces> to finish the game. Now I am not going to be able to finish the game… what am I going to do?”.
Participants
Sixty-eight children in total participated in this study. Eight children were excluded from the final analysis due to participant error (n = 1), experimenter error (n = 6) or failing to engage with the task (n = 1). The final sample included 60 children (22 males, 38 females) aged between 45 and 60 months (M = 53.22, SD = 3.84).
Coding
Helping was coded per task on a scale of 0-4. If a child helped without any prompting, they received the highest score and the more prompts required the lower the helping score. Children who did not help at all received a score of 0. Coding is identical for this and all further studies in this manuscript. Full coding scheme and reliability analyses for all studies are reported in supplementary material.
Results
In all studies, preliminary analyses revealed no effect of age, sex, task type, task order, puppet, and testing location on helping behaviour, thus these factors were not considered further.
Effect of Cost on Helping Behaviour
A one-way between groups ANOVA was conducted to evaluate the effect of condition on helping behaviour. There was a significant effect of condition on helping behaviour, F(2, 30.18) = 4.85, p = 0.015, h2 = 0.13 (Figure 1). Post-hoc multiple comparisons, using Tukey’s HSD test, revealed that helping behaviour was significantly higher for children in the reward immediate condition compared to children in the cost condition (Table 1). No other comparisons were significantly different.
Table 1 Statistical results for helping behaviour analysis by condition.
Condition
|
M (SD)
|
t(57)
|
p
|
Cohen’s d
|
Cost vs. Reward Immediate
|
0.40 (1.10)
|
-2.88
|
.030
|
0.87
|
Cost vs. No Reward
|
3.10 (4.24)
|
-1.23
|
.199
|
0.56
|
Reward Immediate vs. No Reward
|
1.55 (2.69)
|
1.65
|
.363
|
0.44
|
Exploratory Analysis
With our scoring system, children who helped immediately and consistently across tasks received a higher score than children who helped later and rarely. However, it is possible that proportionately more children helped in the conditions that involved a sticker as a reward (e.g. cost and reward immediate conditions) than those without a sticker reward (e.g. no reward). To examine this, we analysed whether the proportion of children helping differed across conditions. Additionally, for children who did not help, we examined whether the proportions of children who consoled or disengaged from the distressed puppet differed across conditions. These were both coded in binary 0-1 (helped/not, consoled/not, disengaged/not). See supplementary material for full coding scheme. A chi-square test of homogeneity was conducted to examine any differences in helping and disengaging behaviours. Fisher’s Exact Probability Test was used for consoling behaviour because three of the expected cell counts were less than five.
Helping. A total of 18 children helped the distressed puppet. This included 3/30 children in the cost condition, 8/20 children in the reward immediate condition, and 7/20 children in the no reward condition (see Figure 2). There was no significant difference in the proportion of children that helped across the three conditions, χ2 (2, N = 60) = 3.33, p = .189, phi = .236.
Consoling. A total of 10 children consoled the distressed puppet when they did not help. There was no significant difference in proportion of children consoling the distressed puppet when they did not help across all three conditions, indicated by Fisher’s Exact Test, p = .572. Across all studies Figures on consoling are presented in supplementary material.
Disengaging. A total of 31 children disengaged from the distressed puppet when they did not help. This included 15/20 children in the cost condition, 8/20 children in the reward immediate and no reward condition. There was a significant difference in proportion of children disengaging from the distressed puppet when they did not help across conditions, χ2 (2, N = 60) = 6.54, p = .038, phi = .330. Following this, post-hoc pairwise comparisons were conducted using z-tests. The proportion of children who disengaged from the distressed puppet was significantly higher in the cost condition than in the reward immediate and no reward condition, p = .038. There was no significant difference between the proportion of children who disengaged from the distressed puppet in the reward immediate and no reward condition. Across all studies Figures on disengaging are presented in supplementary material.
In Study 1 we found that children help more in the immediate reward condition than the cost condition, indicating that cost does reduce helping. Moreover, of children who did not help, those in the cost condition were significantly more likely to disengage from the puppet than those in the immediate reward condition. However, there was no difference between the no reward condition and either the cost or reward immediate condition for these measures. We also found no effect of condition on the proportion of children who helped, or the proportion of children who consoled when they did not help.