Lexical decision template
To install this experiment template, use the command
pushkin install experiment, then select lexical.Lexical decision experiment template, with corrective response set to true.
When correctiveFeedback is set to true, the bounding box will change color to indicate correctness - green meaning correct, and red meaning incorrect. If set to false, the box remains black.
word_1: Word displayed on top in fixation box
word_2: Word displayed on bottom in fixation box
both_words: If true, 'Y' is the correct answer (both word_1 and word_2 are real words). If false, one or both of the words is not a real world and the correct answer is 'N'
related: If true, the words are related to each other (e.g. leaf and tree). If false, the words are unrelated (e.g. sock and tree).
If you have installed an experiment using the lexical decision experiment template and called it
lex, you should have a directory called lex in your experiments folder. This directory should be structured like this:lex
├── api controllers
├── config.yaml
├── LICENSE
├── migrations
├── package-lock.json
├── README.md
├── web page
└── worker
In order to customize your simple lexical decision experiment, you will need to access two files,
config.js and stim.js. These files can be found in web page/src/, a directory that looks like this:src
├── assets
├── config.js
├── consent.js
├── debrief.js
├── experiment.js
├── index.js
└── stim.js
This file controls the aesthetics of your experiment, including font color, font size, and font family. If you wanted to set the font color to
red, set the font size to 20px, and set the font family to a monospace font such as Courier New, you would modify config.js as follows:// Custom stylin'
var experimentConfig = {
fontColor: "red",
fontSize: "20px",
fontFamily: "'Courier New', Courier, monospace",
correctiveFeedback: "true"
}
export default experimentConfig;
You'll also notice that
correctiveFeedback is set to true. You can change this to false so that participants don't receive any feedback. Once you make this change, your final config.js should look like this:// Custom stylin'
var experimentConfig = {
fontColor: "red",
fontSize: "20px",
fontFamily: "'Courier New', Courier, monospace",
correctiveFeedback: "false"
}
export default experimentConfig;
You can run
pushkin prep and pushkin start; to see your changes.This file controls the stimuli presented to participants. It specifies not only (1) what two words should be presented on the screen (
word_1 and word_2), but also (2) whether both words are true words (both_words), and (3) whether the two words are related to each other (related).Say you have created the following table of stimuli for your experiment.
word_1 | word_2 | both_words | related |
FLOWER | PETAL | true | true |
BALL | NET | true | true |
DOG | LEASH | true | true |
COMB | BRUSH | true | true |
BABY | BEAN | true | false |
CAGE | FERN | true | false |
DOG | FLOUR | true | false |
GOAT | SAND | true | false |
VASE | VATE | false | false |
ARM | ARL | false | false |
COAT | COET | false | false |
HAIR | HAIP | false | false |
HAME | HAMA | false | false |
DAKE | GRAKE | false | false |
CLEB | CLED | false | false |
AFTY | AFLY | false | false |
In order to be able to use these stimuli in the lexical decision experiment, you must use a table to JSON converter such as this one to format it correctly for jsPsych.
Once it has been converted, paste the JSON into the
stim.js file, which should now look like this:// Example stimuli
const stimArray = [
{word_1: 'FLOWER', word_2: 'PETAL', both_words: true, related: true},
{word_1: 'BALL', word_2: 'NET', both_words: true, related: true},
{word_1: 'DOG', word_2: 'LEASH', both_words: true, related: true},
{word_1: 'COMB', word_2: 'BRUSH', both_words: true, related: true},
{word_1: 'BABY', word_2: 'BEAN', both_words: true, related: false},
{word_1: 'CAGE', word_2: 'FERN', both_words: true, related: false},
{word_1: 'DOG', word_2: 'FLOUR', both_words: true, related: false},
{word_1: 'GOAT', word_2: 'SAND', both_words: true, related: false},
{word_1: 'VASE', word_2: 'VATE', both_words: false, related: false},
{word_1: 'ARM', word_2: 'ARL', both_words: false, related: false},
{word_1: 'COAT', word_2: 'COET', both_words: false, related: false},
{word_1: 'HAIR', word_2: 'HAIP', both_words: false, related: false},
{word_1: 'HAME', word_2: 'HAMA', both_words: false, related: false},
{word_1: 'DAKE', word_2: 'GRAKE', both_words: false, related: false},
{word_1: 'CLEB', word_2: 'CLED', both_words: false, related: false},
{word_1: 'AFTY', word_2: 'AFLY', both_words: false, related: false}
]
export default stimArray;
Run
pushkin prep and pushkin start; again, and your experiment should be ready to go!Last modified 2yr ago