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Chapter 1 - Universiteit Twente

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Results and discussion<br />

Stage Two: The Path of Least Resistance<br />

A fairly high percentage of participants (78%) complied with the volunteering request,<br />

which was likely a result of the volunteering being described as fun to do. Given the<br />

dichotomous nature of the dependent variable, the data were analyzed using logistical<br />

regression. As predicted, and in line with the results of Experiments 3.1 and 3.2, there<br />

was a significant interaction between depletion induction and heuristic activation on<br />

compliance (Wald(1) = 5.36, p < .05). No other effects were observed.<br />

Chi-square tests confirmed that self-regulatory resource depletion encouraged heuristic<br />

decision making: when the heuristic principle of likeability was activated, 88.5% of the<br />

participants who were depleted of their self-regulatory resources complied with the<br />

request as compared to 65.4% of participants in the no depletion condition (χ²(1) =<br />

3.90, p < .05). When the heuristic was absent from the influence setting, the percentage<br />

of depleted participants that complied was statistically equivalent to the percentage of<br />

non-depleted participants (70.8% vs. 87.5%, χ²(1) = 2.02, ns, see Figure 3.3).<br />

Compliance<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

Likeability No Likeability<br />

Depletion No Depletion<br />

Figure 3.3. Percentage of participants willing to volunteer, as a function of depletion-induction and heuristic-activation<br />

(adapted from Janssen, Fennis, & Pruyn, 2008).<br />

74

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