The Humane League Labs
The Humane League takes an evidence-driven approach to advocacy. Our work is rooted in sound research and a commitment to effective animal protection, all grounded in science.
Research Reports
Animal welfare campaigns
- The State of Slaughter: Violations at Poultry Plants in 2021
- OWA Cage-free Egg Fulfillment Report
- White Striping Disease in Supermarket Chicken
- Eggsposé: Companies Profiting from Packed Cages and Empty Promises
- The Price of a Slice: Animal Cruelty in the Pizza Sector
- Prevalence of Stunning Methods in Broiler Chicken Slaughter in the United States
- Inspiring Action for Farmed Fishes: Finding Messaging that Motivates
- US Egg Production Data Set
- Measuring Better Chicken Commitment–Compliant Chicken Supply
Advocacy
- How Ranking of Advocacy Strategies Can Mislead
- The Unique Challenges of Research in Farm Animal Advocacy
Diet change interventions
- Effectiveness of a Theory-Informed Documentary to Reduce Meat and Animal-Product Consumption: Three Randomized Controlled Experiments
- Interventions to Reduce Meat Consumption by Appealing to Animal Welfare: Meta-analysis and Evidence-Based Recommendations
- Which Request Creates the Most Diet Change?: A Reanalysis
- Which Leaflet is More Effective: A Reanalysis
- Which Farm Animal Photos Are Most Likely To Inspire People To Eat Vegan: A Reanalysis
- Is Animal Cruelty or Abolitionist Messaging More Effective: A Reanalysis
- Is One Message or Multiple Messages More Effective for Inspiring People to Reduce Meat Consumption?†
- What Elements Make a Vegetarian Leaflet More Effective?†
- Which Factory Farming Video is More Effective?†
Plant-based alternatives
- Milking it: Exploring the Impact of Plant-Based Milk in the US
- Which Vegan Meals Do Omnivores Find Most Appetizing and Accessible?†
Methods
- Surveying US College and University Dining Services for Potential Collaboration on Diet Change Research 2017-2018
- Measuring Change in Diet for Animal Advocacy
- The Trouble With Significance Testing
Miscellaneous
- Diet Change and Demographic Characteristics of Vegans, Vegetarians, Semi-Vegetarians, and Omnivores†
- What Cover Photos Make People Most Interested in Reading Pro-Veg Literature?†
† Indicates legacy research, which may not meet the current quality standards of The Humane League. We recommend cautious interpretation of these results and reanalysis of the raw data when possible.