> For the complete documentation index, see [llms.txt](https://languagelearninglab.gitbook.io/pushkin/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://languagelearninglab.gitbook.io/pushkin/getting-started/tutorial-simple-experiment.md).
# Tutorial: Simple Experiment
## Summary of tutorial content
Pushkin’s modularity means that, in principle, you could probably use any javascript-based experiment engine to write your experiments. However, we highly recommend using [jsPsych](https://www.jspsych.org/). Pushkin has only been extensively tested with jsPsych, and all the documentation currently assumes you are using jsPsych.
The tutorial below starts with a simple lexical decision task written in plain jsPsych 7. The tutorial below explains how to modify this code to run in Pushkin. **This is a recommended tutorial for learning the ropes, but a more complete experiment template for lexical decision is available to install through Pushkin (**[**read more**](/pushkin/advanced/modifying-experiment-templates/lexical-decision-template.md)**)**
If you are not familiar with jsPsych, please consult the [documentation](https://www.jspsych.org/) first. We recommend you also walk through some of the tutorials.
**Note:** As of v3.6.0 of the Pushkin CLI, the procedures described here for [moving the timeline](#move-the-timeline) and [importing plugins](#import-plugins) can be automated if you choose to import a jsPsych experiment when you run `pushkin install experiment` and select the basic template (v5+). You can still do these manually if you choose. You may also need to do parts of these procedures in the course of modifying one of the other experiment templates.
### Initial code
We will start with a simple lexical decision experiment. The code has been adapted from the experiment [here](https://github.com/jodeleeuw/bigcog-lexical-decision/) in order to be compatible with jsPsych 7. You can save the code below as an .html file to run it as a standalone jsPsych experiment:
```html
My experiment
```
### Move the timeline
Follow the [Quickstart](/pushkin/getting-started/quickstart.md) through `pushkin install site` or navigate to the root directory of an existing site. Create a new experiment named "lex" and select the latest version of the basic template:
```bash
pushkin install experiment
```
You should now have a folder `experiments/lex` with the following content:
```
└── lex
├── api controllers
├── config.yaml
├── LICENSE
├── migrations
├── README.md
├── web page
│ └── src
│ ├── assets
│ ├── experiment.js
│ └── index.js
└── worker
```
Open `experiment.js`. It should look like this:
```javascript
import jsPsychHtmlKeyboardResponse from "@jspsych/plugin-html-keyboard-response";
export function createTimeline(jsPsych) {
const timeline = [];
var hello_trial = {
type: jsPsychHtmlKeyboardResponse,
stimulus: "Hello world!",
};
timeline.push(hello_trial);
return timeline;
}
```
From the jsPsych code [above](#initial-code), copy everything between `const timeline = []` and `jsPsych.run(timeline);` (excluding those lines). Paste those lines into `/experiments/lex/web page/src/experiment.js` (replacing the existing content) between `const timeline = []` and `return timeline`. Thus you should now have a function `createTimeline()` within which you build up and finally return the timeline for the experiment.
### Import plugins
In the jsPsych code [above](#initial-code), plugins are loaded with `