flesh out extension description and fix minor details

docs/developers/extension-development.md

@@ -66,7 +66,7 @@ let trial = {
   extensions: [
     {type: myAwesomeExtension, params: {demo: 'value'}}
   ]
-});
+};
 
 //... extension code ...//
 class MyAwesomeExtension {
@@ -91,7 +91,7 @@ let trial = {
   extensions: [
     {type: myAwesomeExtension, params: {demo: 'value'}}
   ]
-});
+};
 
 //... extension code ...//
 class MyAwesomeExtension {
@@ -122,7 +122,7 @@ let trial = {
   on_finish: (data) => {
     console.log(data.awesome); // will output 'value'.
   }
-});
+};
 
 //... extension code ...//
 class MyAwesomeExtension {
@@ -168,9 +168,11 @@ The `version` field describes the version of the extension used and then durin t
 
 The `data` field is an object containing all of the `data` generated for the plugin. Each 'data' object has a `type` and `default` property. Additionally, this should be only used for data you choose to generate. Any jsdoc (comments included in the /** */ tags) you include will be scraped as metadata if you are choosing to generate metadata. This scraped metadata will also be used to create the JsPsych documentation.
 
+For more information on the various types of parameters one can include in their data field, see [here](./plugin-development.md#parameter-types).
+
 ### Optional methods
 
-The extension can also include any additional methods that are necessary for interacting with it. See the [webgazer extension](../extensions/webgazer.md) for an example.
+The extension can also include any additional methods that are necessary for interacting with it. See the [WebGazer extension](../extensions/webgazer.md) for an example.
 
 ## Advice for writing extensions
 

docs/overview/extensions.md

@@ -1,6 +1,6 @@
 # Extensions
 
-Extensions are jsPsych modules that can interface with any plugin to extend the functionality of the plugin. A canonical example of an extension is eye tracking. An eye tracking extension allows a plugin to gather gaze data and add it to the plugin's data object.
+In jsPsych, extensions allow one to extend the functionality of various plugins, giving individual plugins the ability to collect more data, display additional stimuli, and more. A canonical example of an extension is [eye tracking](../extensions/webgazer.md), which allow plugins to gather gaze data and add it to the their respective data objects. For a full list of extensions directly included in the jsPsych release, see [here](../extensions/list-of-extensions.md).
 
 ## Using an Extension
 
@@ -16,7 +16,7 @@ To use an extension in an experiment, you'll load the extension file via a `<scr
 ```js
 initJsPsych({
   extensions: [
-    {type: jsPsychExtensionExample, params: {...} }
+    { type: jsPsychExtensionExample, params: {...} }
   ]
 })
 ```
@@ -26,17 +26,11 @@ To enable an extension during a trial, add the extension to the `extensions` lis
 ```js
 var trial = {
   extensions: [
-    {type: jsPsychExtensionExample, params: {...} }
+    { type: jsPsychExtensionExample, params: {...} }
   ]
 }
 ```
 
-## List of Extensions
-
-Extension | Description
------- | -----------
-[jspsych&#8209;ext&#8209;webgazer.js](../extensions/webgazer.md) | Enables eye tracking using the [WebGazer](https://webgazer.cs.brown.edu/) library.
-
 ## Writing an Extension
 
 See our [developer's guide for extensions](../developers/extension-development.md) for information about how to create a new extension.