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main.style("body-background-color","black");
main.style("background-color","black");
main.style("color", "white");
main.style("font-size","80%");
var i,
e,
current,
last,
correct_b0 = 0,
incorrect_b0 = 0,
missed_b0 = 0,
correct_b1 = 0,
incorrect_b1 = 0,
missed_b1 = 0,
correct_b2 = 0,
incorrect_b2 = 0,
missed_b2 = 0,
// pseudorandomized stimuli: 24 per block
b0 = ['1.png','3.png','4.png','6.png','2.png','6.png','3.png','5.png','2.png','3.png','6.png','3.png','6.png','5.png','4.png','6.png','1.png','5.png','4.png','4.png','3.png','1.png','6.png','4.png'],
b1 = ['2.png','3.png','2.png','3.png','6.png','5.png','3.png','3.png','4.png','5.png','6.png','4.png','6.png','6.png','1.png','1.png','3.png','5.png','3.png','6.png','3.png','3.png','2.png','2.png'],
b2 = ['3.png','5.png','1.png','5.png','1.png','2.png','6.png','3.png','3.png','4.png','2.png','5.png','6.png','2.png','6.png','6.png','5.png','3.png','5.png','1.png','6.png','1.png','6.png','4.png'];
preload("1.png");
preload("2.png");
preload("3.png");
preload("4.png");
preload("5.png");
preload("6.png");
instruction("Welcome!
"
+ "
"
+ "You are invited to participate in a research study about visual working memory. "
+ "Participation in this study is voluntary and can be stopped whenever you please. "
+ "All data will be recorded anonymously.
"
+ "
"
+ "By clicking OK, you agree to participate in this experiment.","OK","Informed Consent");
select("Please select your gender?",['male','female','other'],"gender");
input("Please fill in your age?","age");
text("The experiment consists of three different tasks:
"
+ "0-back, 1-back, 2-back
"
+ "
"
+ "In all tasks a string of images will be shown one by one. "
+ "Prior to each task you will be instructed for that particular task.
"
+ "
"
+ "Press space to continue");
awaitkey("SPACE");
clear();
var l = main.addblock("center","bottom",45,45)
text("0-back",200).align("center");
await(2000);
clear();
text("In this task images will be presented one by one. "
+ "For each time you see the image shown below, press the 'S-key'
"
+ "In case of a different image, press the 'L-key'
"
+ "
"
+ "Press space to continue");
l.setimage("3.png")
awaitkey("SPACE");
main.removeblock(l);
clear();
text("The task begins now. Good luck! ");
await(2000);
clear();
// 0back
for (i = 0; i < b0.length; ++i)
{
setimage(b0[i]);
e = awaitkey('s,l',1000);
if (e.key === "l")
{
await(1000 - e.RT);
}
else
{
await(1000 - e.RT);
}
if (b0[i] === '3.png' && e.key === 's')
{
++correct_b0;
logtrial(1,"z-correct");
}
if (b0[i] != '3.png' && e.key === 'l')
{
++correct_b0;
logtrial(1,"z-correct");
}
if (b0[i] === '3.png' && e.key === 'l')
{
++incorrect_b0;
logtrial(1,"z-incorrect");
}
if (b0[i] === '3.png' && e.key === 's')
{
++incorrect_b0;
logtrial(1,"z-incorrect");
}
if (e.type === "timeout")
{
++missed_b0;
logtrial(1,"z-missed");
}
logtrial(e.RT, "z-RT")
clear();
text("+");
await(750);
clear();
}
log(correct_b0, "z-total_correct")
log(incorrect_b0, "z-total_incorrect")
log(missed_b0, "z-total_missed")
// 1back
text("1-back",200).align("center");
await(2000);
clear();
text("In this task images will be presented one by one. "
+ "For each time the presented image is the same as the previous image, press the 'S-key'
"
+ "In case of a different image, press the 'L-key'
"
+ "
"
+ "Press space to continue");
awaitkey("SPACE");
clear();
text("The task begins now. Good luck! ");
await(2000);
clear();
for (i = 0; i < b1.length; ++i)
{
setimage(b1[i]);
current = b1[i];
e = awaitkey('s,l',1000);
if (e.key === "l")
{
await(1000 - e.RT);
}
else
{
await(1000 - e.RT);
}
if (current === b1[i-1] && e.key === 's')
{
++correct_b1;
logtrial(1,"1-correct");
}
if (current === b1[i-1] && e.key === 'l')
{
++incorrect_b1;
logtrial(1,"1-incorrect");
}
if (current != b1[i-1] && e.key === 's')
{
++incorrect_b1;
logtrial(1,"1-incorrect");
}
if (current != b1[i-1] && e.key === 'l')
{
++correct_b1;
logtrial(1,"1-correct");
}
if (e.type === "timeout")
{
++missed_b1;
logtrial(1, "1-missed")
}
await(1000 - e.RT)
logtrial(e.RT, "1-RT")
clear();
text("+");
await(750);
clear();
}
log(correct_b1, "1-total_correct")
log(incorrect_b1, "1-total_incorrect")
log(missed_b1, "1-total_missed")
// 2back
text("2-back",200).align("center");
await(2000);
clear();
text("In this task images will be presented one by one. "
+ "For each time the presented image is the same as the image before the previous image, press the 'S-key'
"
+ "In case of a different image, press the 'L-key'
"
+ "
"
+ "Press space to continue");
awaitkey("SPACE");
clear();
text("The task begins now. Good luck! ");
await(2000);
clear();
for (i = 0; i < b2.length; ++i)
{
setimage(b2[i]);
current = b2[i];
e = awaitkey('s,l',1000);
if (e.key === "l")
{
await(1000 - e.RT);
}
else
{
await(1000 - e.RT);
}
if (current === b2[i-2] && e.key === 's')
{
++correct_b2;
logtrial(1,"2-correct");
}
if (current === b2[i-2] && e.key === 'l')
{
++incorrect_b2;
logtrial(1,"2-incorrect");
}
if (current != b2[i-2] && e.key === 's')
{
++incorrect_b2;
logtrial(1,"2-incorrect");
}
if (current != b2[i-2] && e.key === 'l')
{
++correct_b2;
logtrial(1,"2-correct");
}
if (e.type === "timeout")
{
++missed_b2;
logtrial(1, "2-missed")
}
await(1000 - e.RT)
logtrial(e.RT, "2-RT")
clear();
text("+");
await(750);
clear();
}
log(correct_b2, "2-total_correct")
log(incorrect_b2, "2-total_incorrect")
log(missed_b2, "2-total_missed")
text("Thank you for Participating!
"
+ "
"
+ "Below are the amount of correct trials out of the total 24 images per block
"
+ "0-back:"+ correct_b0 +"
"
+ "1-back:"+ correct_b1 +"
"
+ "2-back:"+ correct_b2);
await(10000)
clear()
text("The aim of the current experiment was to measure visual working memory, with increased workload for each block."
+ "We measured both RT and Accuracy"
+ "The 2back test is experienced hard and scores are therefore often low, so don't feel bad!")
await(10000)
clear()
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.
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