Shawn Wang: uncertainty

Transcript context

…One of the most significant contributions of this paper is formal taxonomy of different prompting techniques. And there's a lot of different ways that you could go about taxonomizing techniques. You could say, okay, we're going to taxonomize them according to application, how they're applied, what fields they're applied in, or what things they perform well at. But the most consistent way we found to do this was taxonomizing according to problem solving strategy. And so this meant for something like chain of thought, where it's making the model output, it's reasoning, maybe you think it's reasoning, maybe not, steps. That is something called generating thought, reasoning steps. And there are actually a lot of techniques just like chain of thought. And chain of thought is not even a unique technique. There was a lot of research from before it that was very, very similar. And I think like Think Aloud or something like that was a predecessor paper, which was actually extraordinarily similar to it. They cite it in their paper, so no issues there. But then there's other things where maybe you have multiple different prompts you're using to solve the same problem, and that's like an ensemble approach. And then there's times where you have the model output something, criticize itself, and then improve its output, and that's a self-criticism approach. And then there's decomposition, zero-shot, and few-shot prompting. Zero-shot in our taxonomy is a bit of a catch-all in the sense that there's a lot of diverse prompting techniques that don't fall into the other categories and also don't use exemplars, so we kind of just put them together in zero-shot. The reason we found it useful to assemble prompts according to their problem-solving strategy is that when it comes to applications, all of these prompting techniques could be applied to any problem, so there's not really a clear differentiation there, but there is a very clear differentiation in how they solve problems. One thing that does make this a bit complex is that a lot of prompting techniques could fall into two or more overall categories. A good example being few-shot chain-of-thought prompting, obviously it's few-shot and it's also chain-of-thought, and that's thought generation. But what we did to make the visualization and the taxonomy clearer is that we chose the primary label for each prompting technique, so few-shot chain-of-thought, it is really more about chain-of-thought, and then few-shot is more of an improvement upon that. There's a variety of other prompting techniques and some hard decisions were made, I mean some of these could have fallen into like four different overall classes, but that's the way we did it and I'm quite happy with the resulting taxonomy. I guess the best way to go through this, you know, you picked out 58 techniques out of your, I don't know, 4,000 papers that you reviewed, maybe we just pick through a few of these that are special to you and discuss them a little bit. We'll just start with zero-shot, I'm just kind of going sequentially through your diagram. So in zero-shot, you had emotion prompting, role prompting, style prompting, S2A, which is I think system to attention, SIM2M, RAR, RE2 is self-ask. I've heard of self-ask the most because Ofir Press is a very big figure in our community, but what are your personal underrated picks there? Let me start with my controversial picks here, actually. Emotion prompting and role prompting, in my opinion, are techniques that are not sufficiently studied in the sense that I don't actually believe they work very well for accuracy-based tasks on more modern models, so GPT-4 class models. We actually put out a tweet recently about role prompting basically saying role prompting doesn't work and we got a lot of feedback on both sides of the issue and we clarified our position in a blog post and basically our position, my position in particular, is that role prompting is useful for text generation tasks, so styling text saying, oh, speak like a pirate, very useful, it does the job. For accuracy-based tasks like MMLU, you're trying to solve a math problem and maybe you tell the AI that it's a math professor and you expect it to have improved performance. I really don't think that works. I'm quite certain that doesn't work on more modern transformers. I think it might have worked on older ones like GPT-3. I know that from anecdotal experience, but also we ran a mini-study as part of the prompt report. It's actually not in there now, but I hope to include it in the next version where we test a bunch of role prompts on MMLU. In particular, I designed a genius prompt, it's like you're a Harvard-educated math professor and you're incredible at solving problems, and then an idiot prompt, which is like you are terrible at math, you can't do basic addition, you can never do anything right, and we ran these on, I think, a couple thousand MMLU questions. The idiot prompt outperformed the genius prompt. I mean, what do you do with that? And all the other prompts were, I think, somewhere in the middle. If I remember correctly, the genius prompt might have been at the bottom, actually, of the list. And the other ones are sort of random roles like a teacher or a businessman. So, there's a couple studies out there which use role prompting and accuracy-based tasks, and one of them has this chart that shows the performance of all these different role prompts, but the difference in accuracy is like a hundredth of a percent. And so I don't think they compute statistical significance there, so it's very hard to tell what the reality is with these prompting techniques. And I think it's a similar thing with emotion prompting and stuff like, I'll tip you $10 if you get this right, or even like, I'll kill my family if you don't get this right. There are a lot of posts about that on Twitter, and the initial posts are super hyped up. I mean, it is reasonably exciting to be able to say, no, it's very exciting to be able to say, look, I found this strange model behavior, and here's how it works for me. I doubt that a lot of these would actually work if they were properly benchmarked.…

Stored transcript either side of the excerpt. The highlighted words are the published quote; the surrounding text is unedited source, never generated.