Morality meets menu

Morality Meets Menu: Investigating the Impact of Moral Appeals on Vegetarianism through a Conjoint Survey Experiment

Overview

  • Authors: Nela Mrchkovska, Nives Dolšak, Aseem Prakash

  • Published: February 23, 2024

  • Core Question: Can moral appeals encourage the adoption of less carbon-intensive diets?

Study Design

  • Method: Conjoint survey experiment with 1520 US respondents.

  • Menu Comparison Factors:

    • Burger/sandwich patty type and corresponding carbon footprint.

    • Calories.

    • Protein content.

    • Price.

    • Ingredient origin.

    • Farming method.

  • Frames Provided to Participants:

    • Reference frame emphasizing scientific rationale for pro-climate action.

    • Moral-secular framing.

    • Moral-religious framing.

Key Findings

  • Overall Preference: Respondents favored non-vegetarian options, particularly those prioritizing taste.

  • Impact of Moral Appeals: Did not significantly influence food choices towards low-carbon options.

  • Subgroup Preferences:

    • Women, individuals with pro-climate attitudes, exposure to vegetarian diets, and those considering health impacts showed a preference for vegetarian options.

Context

  • Climate Change Impact: Food systems account for up to 30% of greenhouse gas emissions.

  • Meat Consumption Concerns: Beef has the highest GHG footprint compared to chicken and vegetarian options.

  • Need for Transformation: Both structural changes in policies and individual behavioral shifts are necessary to mitigate the climate crisis.

Hypothesis Testing

  • Hypotheses:

    • H1: Moral appeals increase preference for less carbon-intensive diets compared to scientific messages.

    • H2a: Liberals respond positively to moral-secular messaging.

    • H2b: Conservatives respond positively to moral-religious messaging.

    • H3a: Individuals identifying as religious prefer moral-religious messages.

    • H3b: Individuals with higher religiosity prefer moral-religious messaging.

Results Analysis

  • H1 Results: No support; moral framing did not affect choices visibly compared to scientific framing.

  • Subgroup Analysis:

    • Some shifts observed among Democrats (H2a) favoring chicken over beef when primed with moral-secular framing, but not strong enough to maintain significance.

    • Republicans did not show a significant difference in preferences when exposed to moral-religious messaging (H2b).

    • No significant preference changes observed based on religiosity levels (H3a and H3b).

Important Considerations

  • Individual Factors Influencing Preferences:

    • Taste: Individuals valuing taste tended to disfavor vegetarian options.

    • Cost: Cost-sensitive individuals favored beef over vegetarian menus despite moral appeals.

    • Health Impact: Those focused on health benefits were more inclined to choose vegetarian menus.

    • Prior Exposure: Previous consumption of vegetarian options increased preference for them by 17%.

    • Beliefs About Climate Change: Beliefs significantly affected preferences for menu options.

Limitations of the Study

  • Hypothetical Situations: Responses in a survey may differ from real-life behaviors.

  • Temporal Effect: One-instance treatment might not reflect long-term behavioral changes.

  • Consumer Perceptions: The notion of vegetarian options as "fake meat" could affect consumer choices.

Conclusion

  • Moral appeals framed as individual obligations did not significantly drive food choice preferences.

  • Emphasizing public health benefits may serve as a more effective strategy to encourage plant-based diet shifts.

  • Further research is needed to explore the effects of sustained exposure to moral messaging and differentiating consumer perceptions of vegetarianism.