Abstract
While questionnaires are still the most common way to survey consumers’ behaviors, it is known that respondents’ answers can be affected by the social desirability attributed to the behavior under investigation. To check whether a social desirability bias also affects electricity consumption self-reports, a study was carried out adopting an explicit (questionnaire) and implicit measurement technique (the autobiographical Implicit Association Test). Three behaviors were probed in this way, with a sample of 180 participants (60 for each behavior). The analysis of the congruence between explicit and implicit answers confirms that desirability bias is at stake in self-reported measures of electricity conservation; it also shows that different behaviors—in this same domain—can be subject to this bias to a different extent and that a considerable amount of participants need to be considered as ambivalent. The methodological and conceptual implications of these findings and of the method are discussed with respect to pro-environmental studies and interventions.
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Notes
A demo page with several different IATs is offered at this URL: https://implicit.harvard.edu/implicit/takeatest.html.
The D index includes a penalty for incorrect trials and expresses the IAT effect (the difference in performance between the two double-categorization blocks) in terms of the standard deviation of the latency measures. It is calculated by subtracting corrected mean RTs in the fifth block from mean RTs in the third block and then dividing the result by the inclusive standard deviation of the two blocks.
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Acknowledgments
This work has been co-funded by the European Union (EU FP7/ICT-2007.6.3, project no. 224557 'BeAware', http://energyawareness.eu). The authors would also like to thank the “Museo Antoniano” and two public libraries, “Brenta-Venezia” and “Emeroteca,” in Padua, for hosting the data collection, and their visitors for participating in the study. They also would like to thank Giulia Bosetti and Pietro Zappaterra for helping in the data collection and Francesco Martino for advising on an earlier version of the work.
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Gamberini, L., Spagnolli, A., Corradi, N. et al. Combining implicit and explicit techniques to reveal social desirability bias in electricity conservation self-reports. Energy Efficiency 7, 923–935 (2014). https://doi.org/10.1007/s12053-014-9266-6
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DOI: https://doi.org/10.1007/s12053-014-9266-6