Corsi Blocks (Simplified)
Jaap MurreFunctional Corsi Block Tap test with immediate feedback. Does not store any data. Useful for demonstrations or informal testing.
This is the long text for the Corsi Block Tap test.
Functional Corsi Block Tap test with immediate feedback. Does not store any data. Useful for demonstrations or informal testing.
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var coords = [[10,10],[20,40],[20,80],[40,30],[45,60], // block coordinates
[60,10],[60,75],[70,50],[80,20],[85,45]], // [[left,top], ...]
blocks = [], i, b, series, e, block,
block_color = "lightgrey",
span = 2, errors, attempts = 0, correct = 0, kessels_score;
instruction("Watch the blocks 'light up' and then click them in the correct order. ");
clear();
await(1500);
for (i = 0; i < coords.length; i++) // Create block layout, use `i` as id
{
blocks.push(main.addblock(coords[i][0],coords[i][1],10,10,block_color,"",i));
}
while (true) // Do 'forever', but really only until `break` is called
{
await(2000);
series = shuffle(range(10)); // Randomize series
for (i = 0; i < span; i++) // 'Play' series
{
b = series[i];
blocks[b].style("backgroundColor","black");
await(500);
blocks[b].style("backgroundColor",block_color);
await(500);
}
errors = 0;
for (i = 0; i < span; i++) // Have subject click series
{
e = await("click"); // Event `e` also contains target node
b = parseInt(e.event.target.id); // parseInt turns a string into a number
blocks[b].blink("black",250); // 250 ms blink to black
if (series[i] !== b) // Count errors
{
++errors;
}
}
++attempts;
if (errors === 0)
{
++correct;
if (attempts === 2) // If twice correct, increase span
{
++span;
attempts = 0;
}
}
else
{
if (attempts === 2) // If twice wrong, stop test
{
--span;
kessels_score = span*correct; // Kessels et al. (2000)
break; // Break out of while loop
}
}
}
await(1000);
main.addblock("center","center",90,90,"white","Your Corsi blocks span is " + span);
console.log("Corsi Span: ",span," Kessels Score: ",kessels_score);