Kadel Philipp, Herwig Ira E, Mata Jutta
Health Psychology, School of Social Sciences, Department of Psychology, University of Mannheim, Mannheim, Germany.
Psychol Health. 2024 Nov;39(11):1656-1673. doi: 10.1080/08870446.2023.2182895. Epub 2023 Mar 1.
Despite abundant information about negative consequences of consuming meat, consumption in many Western countries is many times higher than recommended. One possible explanation for this discrepancy is that people consciously decide to ignore such information-a phenomenon called deliberate ignorance. We investigated this potential barrier for information interventions aiming to reduce meat consumption.
In three studies, a total of 1133 participants had the opportunity to see 18 information chunks on negative consequences of meat consumption or to ignore part of the information. Deliberate ignorance was measured as the number of ignored information chunks. We assessed potential predictors and outcomes of deliberate ignorance. Interventions to reduce deliberate ignorance (i.e., self-affirmation, contemplation, and self-efficacy) were experimentally tested.
The more information participants ignored, the less they changed their intention to reduce their meat consumption ( = -.124). This effect was partially explained by cognitive dissonance induced by the presented information. While neither self-affirmation nor contemplation exercises reduced deliberate ignorance, self-efficacy exercises did.
Deliberate ignorance is a potential barrier for information interventions aiming to reduce meat consumption and needs to be considered in future interventions and research. Self-efficacy exercises are a promising approach to reduce deliberate ignorance and should be further explored.
