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This project is a replication of an effect found in an online experiment (Grandin et al., 2022). In this study, we recruited British participants who underestimated their position in the national income distribution (N = 855). In the treatment group, participants received a correction of their misperception, in order to increase their perceived relative income. In the original study, our main hypothesis was that this positive information shock would shift participants’ time preferences, by increasing their orientation towards the future. As exploratory hypotheses, we also predicted that this shift in time preferences would be moderated by the size of participants’ bias, and that it would induce a shift in pro-environmental attitudes and behaviour. In other words, there would be a moderated mediating effect of the treatment on environmental variables. Although the expected shift towards increased preferences for the future was not observed, we found a moderated direct effect of the treatment on pro-environmental attitudes and behaviour (see Grandin et al., 2022). One goal of the new study that we plan to launch is to replicate this moderated direct effect of the treatment. There are a few differences with the original study. The first difference is that we will not collect data about participants’ time preferences, because we only want to replicate the direct effect of the treatment on pro-environmental attitudes and behaviour. We will not measure participants' social trust either (as this measure was collected for another study: https://osf.io/xucgw/). In addition, this replication will be part of a larger project on pro-environmentalism and carbon footprint reduction (see https://osf.io/7fvcx/?view_only=506fa75c2a9a44ae948ae96a0c57cdc8 for more details). Therefore, the study will also contain additional questions about participants’ personal carbon footprint. There will also be a major difference in the design. This time, we will not only select British participants who underestimate their position: we will recruit both participants who believe themselves to be poorer than they actually are (relative to others), participants who believe themselves to be richer than they actually are, and participants who estimate well their relative level of wealth. All of these participants will be randomly assigned either to the treatment or the control group. In the treatment group, we will provide them with information about their actual position in the national income distribution. Therefore, there will be three levels of treatment in this replication: depending on their bias, participants will be exposed either to positive, neutral or negative feedbacks. This will allow us to test our hypothesis more fully. In addition, the study will contain minor changes such as the addition of an attention check at the beginning and a manipulation check at the end. The measure of pro-environmental behaviour will also be different. Instead of relying on a donation question, we will ask participants if they are interested in a detailed calculation of their carbon footprint. Those who answer ‘yes’ will be redirected toward an online carbon footprint calculator. Our behavioural measure is a measure of the time spent on the carbon footprint calculator. Original study: ● Grandin, A., Guillou, L., Sater, R. A., Foucault, M., & Chevallier, C. (2022). Socioeconomic status, time preferences and pro-environmentalism. Journal of Environmental Psychology, 79, 101720. https://doi.org/10.1016/j.jenvp.2021.101720 |
