var colRed = new Array(10).fill('red');
var colGre = new Array(10).fill('green');
var colBlu = new Array(10).fill('blue');
var colYel = new Array(10).fill('yellow');
var color=[];
color = color.concat(colRed,colGre, colBlu, colYel);

//var words=getwords('words.txt');
//comment out the fill arrays to replace words with actual stimuli, remove the congruent checker. 
var worRed = new Array(10).fill('RED');
var worGre = new Array(10).fill('GREEN');
var worBlu = new Array(10).fill('BLUE');
var worYel = new Array(10).fill('YELLOW');
var words = [];
words = words.concat(worRed, worGre, worBlu, worYel);

shuffle(words);
shuffle(color);

instruction("Welcome to the Stroop task part of the research.");
instruction("You will be shown words on screen. Pay attention to the color of the word and press the appropriate key.");
instruction("V for red, B for green, N for blue and M for yellow. \nReady?");

main.style("body-background-color","black");
var a = main.addblock('center', 'center', 100,100,'black');

var v= main.addblock('left', 'bottom', 10,10, 'red');
var b= main.addblock(30, 'bottom', 10, 10, 'green');
var n = main.addblock(60, 'bottom', 10, 10, 'blue');
var m = main.addblock('right', 'bottom', 10, 10, 'yellow');
v.text('v').style('color','black');
b.text('b').style('color','black');
n.text('n').style('color','black');
m.text('m').style('color','black');

for (var i=0; i < words.length; ++i)
{
    log(words[i],"stWord");
    log(color[i],"stCol");
    //remove this congruent checker if using word stimuli that are not colors
    //congruent checker also needs to be changed if word and WORD are no longer the same (i.e. different language)
    if (words[i] === color[i].toUpperCase()) 
        log(1, "cong");
    else log(0, "cong");
    
    a.text(words[i]).style('color',color[i]);
    e=awaitkey('v,b,n,m', 3000);
    
    if (e.type === "timeout"){
        log(1, 'timeout');
        a.text("Try to be faster!").style('color','white');
        await(700);
        a.clear();
    }
    else {
    log(e.RT, "Reaction Time");
    log(e.key, "Key");
        if ((e.key === 'v' && color[i] === 'red') || (e.key === 'b' && color[i] === 'green') ||(e.key === 'n' && color[i] === 'blue') ||(e.key === 'm' && color[i] === 'yellow') ){
            log(1, "cor");
            a.text("Correct").style('color','white');
            await(500);
            a.clear();
        }
        else {
            log(0,"cor");
            a.text("Wrong").style('color','white');
            await(500);
            a.clear();
        }
        
    }
} 
main.removeblock(a);
main.removeblock(v);
main.removeblock(b);
main.removeblock(n);
main.removeblock(m);

text("You can now close this tab and return to the questionnaire.");
await(3000);

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.