字幕列表 影片播放 列印英文字幕 JOSEPH JAY WILLIAMS: So I just want to mention, my background is in cognitive science. So I'm really interested in doing experiments in terms of understanding how people learn. And to get a sense of the way that fits in with the research landscape, because there's a ton of research on learning and many insights. I guess the best concept is thinking in terms of qualitative analyses. So these rich investigations that you see from a sociological perspective. Education schools that will take a student and really take a very close look at what they're learning. Explore how they're understanding of algebra and all the difference misconceptions they can have. Then there's also things that are much more like randomized control trials. So policy workwear. You might take a bunch of students in the school and give them a treatment where they undergo a training program. And then you can see if that actually has an effect compared to control group. And that's a very large scale. There's longitudinal studies, which, again, are very long time scale. Collecting measures, like people's grades or students' outcomes as they progress through traditional education. And of course there's working computer science and Educational Data Mining, where you take very large data sets in terms of observations, then try and induce what's going on with learners. As is terms of the way cognitive science fits in with this, I think it's in between something like a randomized control trial, longitudinal study and some light qualitative analysis. Because most of the experiments we do on a short time scale. And it really involves precisely controlling what someone's learning in a particular situation and trying out different forms of instruction and then assessing how learning is occurring after that. And you might think that from such micro experiments you can't learn much. But that's actually the expertise in cognitive science. And I think it's ready insightful. It's obviously using a lot of insights. But I think it's ready well suited for online education, where often you want to ask questions that intermediate between again, quality of assessment of what's going on, and running a full-out randomized control trial where you give people two different versions of the course. There are questions about how you should frame instruction, what kind of video you should show someone, and the kind of strategies you should teach them. So it just lets you know where it sits in there. And what's also nice about cognitive science as an approach is it's pretty interdisciplinary. In a sense, you've got psychology, which is heavily focused on experiments. Philosophy, in terms of really trying to do good conception analysis of what problem you're facing and classifying different kinds of learning. Linguistics, anthropology, as I mentioned, neuroscience, and of course, AI. And what's also nice, I think, is that it's also a bit easier for people in cognitive science perhaps to talk with the kind of researchers at Google who are interested often in things like modeling and machine learning. So to give you a bit of a preview of [INAUDIBLE] cover. So I'm going to talk about two ways you could think about learning. One that I think gives us a lot of rich insights into how to improve education. And I'm going to talk about very quickly three finds in cognitive science that I find have been particularly powerful. It's thinking about what can you do before someone starts learning in terms of framing their learning as an answer to a problem? What can you do during learning in terms of requesting explanations from the learner? And then what can you do after learning? A new and interesting finding here is that you can actually use assessments as instructional tools. Having people take a test can actually be more powerful for learning than having them study material again. And then having looked at some of what we know about how to promote learning of a concept or some set of knowledge, it's worth asking, well, what knowledge can we teach someone that's actually going to have the biggest impact practically? And that's why I think thinking about this idea of what do people learn that's going to help them learn more? So it's not just on this concept but across a range of situations. And then I'll talk about how you can change people's beliefs and have a massive effect on their motivation. You can teach people strategies for learning that then have trickle down effects on all the content they may come across. And then finally, I'm going to talk about online search, which is something I really started to think about seriously recently since looking [INAUDIBLE] of a power searching course. And I actually think this is a really fascinating topic that's right at the junction of things that are really important to industry and the business world, and also really important to education. And I think that's actually a great place to focus, because it allows you to get the benefits of private innovation as well as academic work. And also it means that you can use insights across areas. When you're teaching a business person about search, you're also learning something about how you could help a child to be more inventive in the way they discover information on the internet. How is my speed in terms of talking? Because with an accent, it probably sounds like twice as fast. And I speak twice as fast, so you're hitting a lot of powers being raised there. OK. And one thing I'll cover at the end is I put on the website just a list of resources that I found really useful in terms of knowing what the literature is that has shown really impressive effects on learning. When you go in Google Scholar, I mean literally there are thousands of papers there. And I think that can be daunting. And it's just easy to start with your problem and work on that. But there's always tons of really interesting relevant work. And so I tried to put aside some of the resources that I found most useful. So I have hyperlinks to some of the papers there and brief explanations of what they're about. And also information about other things that I'll talk about at the end. So in terms of learning, I think one kind of challenge, even after studying learning for all my adult life, I still think that there's this kind of intuition or this intuitive theory that I have about learning that holds me back, or misleads me when I'm making instructional decisions. I think it's something that's sort of common across many of us. In the Cambridge Handbook of Learning and Sciences they refer to this idea that when you learn something, you're just dropping it into a bucket. Learning is transferred from the teacher to the student. So let's think about some content. For example, learning from a video, like from a power searching online video, a Khan Academy video. Or reading text, which is how we absorb most of our information. Or you could think about learning from an exercise. So a student solving a math problem, or someone attempting to process a financial statement or do some budgeting or solving a problem of managing relationships with coworkers. Anytime you can see those icons I need to represent, you can stick your personal content in there. So if you have a favorite example of learning or one that's particularly relevant to your everyday experience or your job, just feel free to insert that every time that flashes out. But I'll try to illustrate it with examples. Because again there's good evidence that that's an important thing to do for learning. So I think there's this intuition that what learning is about is just adding information. So it's almost as if we have this model where the mind is a bucket. And so what does it mean to learn? Well it means to take information and drop it in that bucket. Whether it's videos, text, solving stuff, just put it in. And later on you can come back and get it. But actually I think a much better way of thinking about learning is that it's like taking a piece of information, integrating it into the internet, and assuming it had a web page. So that galaxy is the internet. And you can guess what those big giant planets are. So how might you think about this analogy shedding more light on learning? Well under this kind of view, when you're adding content to the internet, first of all, you have to think about three stages. Well what do you do before the content arrives? Or what do you do in linking it to what's already known? So it's really important now. You're not just dropping in a bucket. You're actually linking it to web pages that already exist by citing them. You're putting on a particular domain. And so I think this is very analogous to the challenge we face as learners of how do you get information to link up to what people already know? And in what kind of knowledge are you linking new concepts to? And I think that some things are obvious when we look at it. But it's definitely not at the forefront, I think, of a lot of instructional decisions. Also if we think now even of processes people engage in while they're learning. Everyone on the internet, time is limited, they're not going to read your whole page. If you're lucky they will even read the first few lines. So we have to ask questions like, how do you structure the information on a web page so that the really core concepts jump out? What are the key principles? Or depending on the person, is the web page structured so they can get to the information they need? And so this is analogous to when we're processing something like a video or a bunch of text, it's actually just flat out impossible to remember all that information. So what are the cognitive operations you're engaging in that pick out some information as being more important than others? Some relationships or some principles or some details of whatever content you're learning. And then finally, what's the last part of getting a web page off of the internet? Again, I think you guys all have a better advantage in answering these audience type [INAUDIBLE] questions. But it's actually being able to find it. And this is probably the most underlooked part of what learning involves. Because anytime you learn something, it's only going to be learning if it influences your mind in a way that, at some point in the future, you're going to act differently because of it. So you have to retrieve that information somewhere. So for example, the final stage of learning is it's got to be set up in a way that it's got the right cues or the right connections that when someone goes looking for that information, they're actually going to find it. For example I might be really interested in things about mathematics from a video. And you could say that I know it. But when I am actually faced with a situation where I have to solve or differentiate something, am I actually going to remember that fact at that moment? Or am I going to remember something else I learned about differentiation, or something else about functions? And so really a key challenge in learning is the instruction has to actually ensure that people are putting information in the right way that they can access it later.