Shared Scripts, Data, Stimuli, Files, and Demos
Emotional Stroop Demo
Jaap MurreYou can adapt the script with different words. It is easy to add extra stimuli as well: Simply copy lines and update them. In this for, the experiment cannot be done on mobile phones or tablets; a keyboard is required. If you know how to program, three color buttons can be added. These can then be operated by either a mouse or finger taps.
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var i, event, total_correct = 0, total_RT = 0;
// The following is an array with objects
// E.g., see https://www.w3schools.com/js/js_arrays.asp for how to use these
var trials = [
// Emotion words (mix of negative and positive)
{word: 'danger', color: 'green', key: 'g', condition: 'emotion'},
{word: 'cancer', color: 'green', key: 'g', condition: 'emotion'},
{word: 'failure', color: 'red', key: 'r', condition: 'emotion'},
{word: 'love', color: 'blue', key: 'b', condition: 'emotion'},
{word: 'success', color: 'red', key: 'r', condition: 'emotion'},
{word: 'joy', color: 'blue', key: 'b', condition: 'emotion'},
// Neutral words
{word: 'window', color: 'red', key: 'r', condition: 'neutral'},
{word: 'paper', color: 'blue', key: 'b', condition: 'neutral'},
{word: 'bottle', color: 'blue', key: 'b', condition: 'neutral'},
{word: 'garden', color: 'red', key: 'r', condition: 'neutral'},
{word: 'pencil', color: 'green', key: 'g', condition: 'neutral'},
{word: 'chair', color: 'blue', key: 'b', condition: 'neutral'}
];
/*
For the color words you can use any word from the side bar menu
at Scripting -> Colors. E.g., aliceblue, antiquewhite, aqua etc
*/
shuffle(trials); // Randomize trial order
// Here you might also have a condition with just XXXX instead of the word. This gives faster trials.
instruction("Press the first letter of the color in which the word is printed, ignoring the word itself: r, g, or b.");
text("The experiment will start shortly. Get ready!");
await(2000);
for (i = 0; i < trials.length; i++) {
text("+").style("color","black");
await(500);
clear();
await(Math.random());
// Access your trial objects like this:
text(trials[i].word).style("color",trials[i].color);
event = await("keypress");
total_RT = total_RT + event.RT;
if (event.key === trials[i].key) { // The key pressed is the correct one
total_correct = total_correct + 1;
logtrial(event.RT,"RT " + trials[i].condition,"correct",trials[i].word,trials[i].color);
} else {
logtrial(event.RT,"RT " + trials[i].condition,"incorrect",trials[i].word,trials[i].color);
}
clear();
await(1000);
}
log(total_correct,"Total Correct"); // This is just handy
text("Finished!").style("color","black"); // Switch back to all black font style
await(1000);
// Give some feedback
instruction("You had " + total_correct + " correct, out of " + trials.length
+ ", with an average RT of "
+ (total_RT/trials.length).toFixed(1) + " ms.","OK","Result");
text("Thank you for participating!");
await(2000);
Data inspection is forthcoming!
In the mean time, authors may download their own data and make it available as an Excel file. Check out the 'Stimuli and Files' tab.