[Xiangyu]

Hi Jeremy,

I have some other questions regarding to the logging participants’ correct response. In my experiment, say I included an additional column “CorrectResp” coding all correct response as “F” or “J”, and I would like to compare this column with participants’ key response. Can I use Javascript to do this? Here is my draft for checking the accuracy of keypress:

newKey("keypress", "FJ")
    .log()
    .wait(function() {
        // Get the participant's response
        var response = this.keys;
        // Get the correct response from the CSV file
        var correctResponse = variable.CorrectResponse;
        // Check whether the participant's response matches the correct response
        if (response === correctResponse) {
            // Log a correct response
            log("CorrectResponse", 1);
        } else {
            // Log an incorrect response
            log("CorrectResponse", 0);
        }
    })

I searched the forum and documentation, and find test.pressed() seems to be okay, but I have no idea how to make the function automatically compare the response from participants with the pre-logged correct response in “sentences.csv” file.

Thanks a lot for your kind help!

[Xiangyu]

This part is solved:
“The display of pictures and sentences are sometimes inconsistent. For example, PCIbex may picture from select the second row and show a sentence is not from second row. I would like the script only allows shuffling blocks and randomize the within-block trials sequences as per the row. PCIbex seems to shuffle too much across the rows.”

[Xiangyu]

Hi Jeremy,

I figured out my questions in using getX(). remove().

However, I found a more severe problem. After the adoption of

blocks = [randomize('block1'),randomize('block2'),randomize('block3'),randomize('block4')];
fisherYates(blocks); // Ibex-internal function that shuffles an array
Sequence("consent","welcome", "instructions", "blocks",SendResults(), "goodbye");

The display of pictures and sentences are sometimes inconsistent. For example, PCIbex may picture from select the second row and show a sentence is not from second row. I would like the script only allows shuffling blocks and randomize the within-block trials sequences as per the row. PCIbex seems to shuffle too much across the rows.

Best,
Xiangyu

[Xiangyu]

Hi Jeremy,

Thank you so much for pointing me to the fisherYates()! It works with the experiment structure and now I have all elements displayed in between the Introduction and Goodbye.

I have another experiment-related query regarding how to make images and text invisible after 600 and 2100 milliseconds of delay for printing out. Therefore, I would like to set the display time of the image to 600 milliseconds and then print the TargetSentence visible for 2100 milliseconds, so that when participants are selecting a sentence, they cannot see preceding elements.

I searched the documentation with the keyword “invisible” and “remove” but the description does not have interaction with the Timer. In summary, I have two questions as follows:
How can I display an image for only 600 ms and then make it disappear?
What is the best way to make a TargetSentence visible for 2100 ms and then hide it from participants?

All the best,
Xiangyu

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