# jspsych-survey-text plugin

The survey-text plugin displays a set of questions with free response text fields. The subject types in answers.

## Parameters

Parameters with a default value of *undefined* must be specified. Other parameters can be left unspecified if the default value is acceptable.

Parameter | Type | Default Value | Description
----------|------|---------------|------------
questions | array | *undefined* | An array of objects, each object represents a question that appears on the screen. Each object contains a prompt, value, rows, and columns parameter that will be applied to the question. See examples below for further clarification.`prompt`: Type string, default value of *undefined*. The string is the prompt for the subject to respond to. Each question gets its own response field.`value`: Type array, default value of `[""]`. The string will be used to populate the response field with editable answers.`rows`: Type array, default value of 1. The number of rows for the response text box. `columns`: Type array, default value of 40. The number of columns for the response text box.
preamble | string | empty string | HTML formatted string to display at the top of the page above all the questions.
button_label | string |  'Continue' | The text that appears on the button to finish the trial.

## Data Generated

In addition to the [default data collected by all plugins](overview#datacollectedbyplugins), this plugin collects the following data for each trial.

Name | Type | Value
-----|------|------
responses | JSON string | A string in JSON format containing the response for each question. The encoded object will have a separate variable for the response to each question, with the first question in the trial being recorded in `Q0`, the second in `Q1`, and so on. Each response is a string containing whatever the subject typed into the associated text box.
rt | numeric | The response time in milliseconds for the subject to make a response.

## Examples

### Basic example

```javascript
// defining groups of questions that will go together.
var survey_trial = {
  type: 'survey-text',
  questions: [{prompt: "How old are you?"}, {prompt: "Where were you born?"}],
};
```

### Custom number of rows and columns

```javascript
var survey_trial = {
  type: 'survey-text',
  questions: [{prompt: "How old are you?", rows: 5, columns: 40}, {prompt: "Where were you born?", rows: 3, columns: 50}],
};
```