 Hi, my name is Sebastia Mato. I'm the lead developer of OpenSesame and today I'm going to show you a tech preview of OS Web, an online runtime environment for OpenSesame experiments. So this is a very early version of a tool to run OpenSesame experiments, which you would normally run in a browser or on a tablet or on a phone, in a web browser. So you can run your OpenSesame experiments online. This is work that's done largely by Jaap Bosen, engineer from the University of Groningen, and Daniel Schrij, one of the core OpenSesame developers. So all of the credit for the work that you will see here is for that. What I will do is just show you a very simple experiment, this one, a gaze-cuing experiment. And I will first run the experiment in just in OpenSesame, the desktop application, under Ubuntu in this case, but under Windows or macOS, it would work exactly the same way. And then I will run the same experiment in a web browser. So in this experiment, just to give you a bit of background, participants see a smiley face and this smiley face looks either to the left or to the right side of the screen, but it is completely irrelevant for the task. What the participants have to do at the same time is identify a target letter, which can be an F or an H. So they have to press one key if they see an F and another key if they press an H. And on some trials, the smiley face happens to look at the target letter and participants are fast. And on other trials, the smiley face happens to look in the other direction from the target letter, so participants are slow. In other words, the main finding from this experiment is that participants automatically follow the gaze of the smiley face, even if this is not relevant for the task at hand. That's a bit of background. Let's just run the experiment. So I'll run it in a window for you. Okay, so the instructions, press Z if you see an F and M if you see an H. Let's go. So we'll run eight trials, just a very short block. So you will have to bear with me. All right, so you see that the smiley face looks to the left or to the right. And I have to ignore the smiley face essentially and report whether I see an F or an H. I've done this many, many, many times. I'm pretty good at it. Okay, there we go. Okay, now, and then at the end of the block, the participants get a bit of feedback on their reaction time in this case, but you can also give them feedback, of course, on their accuracy and so on. So let's stop this. Let's abort this experiment and switch to a browser. So here I open Google Chrome, but you can run it also in any reasonably modern browser. And I will run the exact same experiment that I was just running in Open Sesame Desktop. All right, so I'll drag it to here, choose File, I'll click Run Experiment. It will ask me for subject number. I have to press with the mouse on the screen. And then you will see I get the instructions screen, press Z if you see an F and M if you see an H. Let's go. And then I do the exact same experiment. There's no difference, and that's kind of the point on that you can run your desktop experiment in a browser without really making any kind of real difference. So that's pretty sweet. Okay, so I'll do eight trials and then show you that the feedback at the end of the experiment also works. And the block your average reaction time was 538 milliseconds. So this is kind of the idea. We want to, and we actually already are quite a long ways towards a system that allows you to run Open Sesame experiments without any restrictions in a web browser. And that is always web. That's what we are currently working on. Thank you very much.