Eating more plant-based foods can benefit public health, reduce animal suffering, and lower environmental harm. However, global meat consumption continues to rise despite growing awareness of these benefits. Some efforts to encourage dietary change can also backfire, making people feel pressured and reinforcing their existing habits. These reactions, often called psychological reactance, can happen even when messages align with a person’s values.

While many studies focus on whether interventions change behavior, less is known about why people respond defensively and how personality traits shape these reactions. This study explores how different types of meat reduction messages affect willingness to change, and whether these effects vary based on individual traits.

How The Study Worked

This study measured how 1,070 U.K. meat-eaters responded to two types of interventions, presented either separately or together. One was a reflection prompt that asked participants to consider whether eating meat conflicted with their environmental values. The other was an action plan that offered simple ways to reduce meat consumption. The study authors hypothesized that exposure to these interventions, particularly when combined, would increase willingness to change.

Afterward, participants completed a survey measuring several outcomes, including their willingness to reduce meat consumption, support for plant-forward policies, and levels of psychological reactance (feeling pressured or imposed upon).

The survey also assessed moral disengagement (how much people justified or downplayed the consequences of their meat consumption) and antisocial tendencies, such as being cynical or insensitive.

When An Intervention Backfires

Instead of increasing openness, the action plan actually reduced participants’ willingness to change, while the reflection prompt had no significant effect. Each intervention made participants feel pressured — and even more so when the two were combined.

Feeling pressured was closely linked to lower willingness to reduce meat consumption, suggesting that reactance played a key role in the action plan’s backfire effect. The interventions didn’t have a clear effect on support for plant-based policies or moral disengagement.

People with stronger antisocial tendencies were less willing to change, less supportive of plant-based policies, and more likely to feel reactance. Effects on willingness and support were even stronger when they were exposed to both interventions. However, antisocial traits weren’t linked to moral disengagement.

What To Keep In Mind

Though the study contained a broad, representative sample, it had several limitations. The interventions were brief and only examined short-term, self-reported reactions, so it’s unclear whether these effects would last over time.

Since the sample only included U.K. meat-eaters, the results may not apply to other countries or groups, especially those who are already more open to reducing meat consumption.

Finally, these interventions were focused on environmental concerns. Messages focused on animal welfare or personal health benefits could lead to different responses.

What This Means For Advocates

These findings suggest that efforts to reduce meat consumption can backfire if they make people feel pressured. Avoiding this kind of psychological reactance should be a top priority for advocates in future interventions. Other research shows that environmental messaging can still be effective when it doesn’t trigger reactance, suggesting that presentation can be just as important as the message itself.

Instead of pointing out gaps between people’s values and behavior, messaging may be more effective when it emphasizes choice, autonomy, and addition instead of subtraction. In practice, this might include offering simple, optional ways to try plant-based foods rather than telling people what they should do.

The results also show that some people are more resistant than others. Individuals with stronger antisocial tendencies were less willing to change and more likely to react negatively when exposed to these interventions. For these audiences, messages that focus on personal benefits (such as health or cost) or changes in the broader food environment may be more effective than moral appeals.