That's a good point, generally people won't report that accurately if they think there is any judgement. Hard to do this sort of survey without there being implied judgement. Also while whether someone has "gone vegan" is fairly clear, its not clear when someone has actually reduced meat intake because few people are really adding it up. Many people in the US report that they are "reduce meat" yet industry data shows increased consumption.esquizofrenico wrote: ↑Thu Mar 08, 2018 5:43 am The biggest problem I see with this kind of experiment is that you are judging your results from what people are willing to say, this could give a lot of problems. For example, it could be that a harsh approach make a lot of people angry that will say they will consume the same amount of meat or more, while to a few it causes a deep impact and makes them to really take the matter seriously; while a "nice" approach make people like the speaker and sympathetically say they will reduce their meat consumption, while actually not feeling any drive to do it in the real life. In that case this experiment would determine that the "nice" approach is more efficient, wrongly.
What is somewhat amusing is that a good number of self identified "vegetarians" still eat meat, people often use labels loosely. So what you'd really want to do is do a dietary survey that asks concrete questions about foods, asks people to summarize their last 1~2 days of meals, etc.