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Related Experiment Video

Updated: Sep 20, 2025

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

Published on: June 3, 2013

Minor and inconsistent differences in Big Five personality traits between vegetarians and vegans.

Markus Müssig^1,2, Tamara M Pfeiler¹, Boris Egloff¹

¹Johannes Gutenberg University Mainz, Mainz, Germany.

|June 8, 2022

Summary

This study explored personality differences between vegetarians and vegans. Results indicate minimal distinctions in the Big Five personality traits, suggesting current dietary groupings may be acceptable.

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Published on: June 4, 2014

Area of Science:

Psychology
Nutrition Science
Social Science

Background:

Previous research often grouped vegetarians and vegans, potentially overlooking nuanced differences.
Understanding personality traits associated with specific dietary choices is crucial for comprehensive dietary research.

Purpose of the Study:

To investigate potential differences in the Big Five personality traits between vegetarians and vegans.
To determine if consolidating these dietary groups in research is scientifically justified.

Main Methods:

Two studies were conducted using data from German convenience and socio-economic panel samples.
Personality traits (Big Five) were analyzed in relation to vegetarian and vegan dietary patterns.
Analyses controlled for socio-demographic variables like age, gender, and socio-economic status.

Main Results:

A pre-study indicated vegans scored slightly higher in Openness than vegetarians (d = 0.22).
The main study found vegetarians scored slightly higher in Neuroticism (d = 0.18), with no significant Openness differences.
No significant differences were observed for Conscientiousness, Extraversion, or Agreeableness in either study.

Conclusions:

There appear to be no or only minor personality differences between vegetarians and vegans.
The consolidation of vegetarians and vegans in research may be largely justifiable based on personality traits.
Larger, representative samples are recommended for more definitive insights into diet-personality relationships.