[Jeremy]

Hi,

I can’t imagine how a local installment of the Ibex Farm could produce the results file that you report: there’s one line missing in the middle, but all the lines are sent at once to the server, and they should all be written to the results file as a block

Jeremy

[Jeremy]

Hi,

See this message (don’t mind the warning in bold, it doesn’t concern you since you’re running the experiment on farm.pcibex.net)

Jeremy

[Jeremy]

Hi,

I am sorry you are experiencing this problem. The workaround actually shouldn’t require copying the whole project: re-creating the file that displays the problem (after saving a backup copy and deleting it from the project) should fix the issue, at least momentarily, which is less dangerous than duplicating the whole project and then deleting the original one

Jeremy

[Jeremy]

Hi Lily,

Your bucket should allow public access to your file, see this post for details

Jeremy

[Jeremy]

Hi,

If you don’t want your scale to be a slider, but a likert scale, don’t use slider:

newScale("Echelle_Comm", 10) // changed 100 to 10
    .center()
    // .slider() // this line commented out
    .css({"margin-top" : "50px", "max-width" : "unset", "width" : "400px", "height":"10px"})
    .print()
    .log()

Jeremy

[Jeremy]

Hi Lily,

it also gives me a break after my final item, which is the 10th audio file in my current situation.

You can change the definition of sepWithN to handle that situation. Add , dropLast to the functions’ arguments, and prefix newArray.push(sep[j]); with a conditional on whether there remain any items in main. Concretely, replace the respective lines with:

function SepWithN(sep, main, n, dropLast) {
// ...
                    if (main.length>0||dropLast==undefined) newArray.push(sep[j]);
// ...
function sepWithN(sep, main, n, dropLast) { return new SepWithN(sep, main, n, dropLast); }

Then you can sepWithN to not add the last break like this: sepWithN( "break", randomize("experiment"), 5, "dropLast")

However, with my script below, I have something that kind of looks like reaction time in my results. The reaction time-like thingy appears in the column of my rating results, that is the “value” column. Do you know what may have happened here?

Scale elements will log which button was selected, and when it was selected. You should see a value from 1 to 7 in one column (the selected button) and a 13-digit number in another (the timestamp). You’ll also have a timestamp for when the audio stopped playing in an earlier line: subtract the end-of-playback timestamp from the scale-choice timestamp and you’ll get your response time

I was trying to add space in between by using the code: newCanvas(“empty canvas”, 1, 40).print(), but it only works between elements (texts, buttons), not the page bottom

It does work at the bottom of the page, but if you’re printing the Canvas element after the “Agree” button was clicked (ie. after its wait command) then you’ll just never see it. But this would work:

newButton("Agree").print()
,
newCanvas("empty canvas", 1, 40).print()
,
getButton("Agree").wait()

I saw that you suggested in another post to upload a zip file to avoid this problem. But what I don’t understand is where I could host the zip file. I know that cloud services like Dropbox and Google Drive don’t work, what about GitHub? Or any suggestion on this issue?

GitHub does not provide that service: in order for the experiment to run, it needs to download the zip file in the background, but by default background downloads from other domains (ie. from outside the farm) are blocked by browsers, unless the distant server explicitly gives permission for the operation, which you can do with some services, but not with GitHub

One such service you could look into is Amazon S3, which is included in the 12-month AWS Free Tier offer. See this post for more information

Jeremy

[Jeremy]

Hi Lily,

The function sepWithN is not a native function to Ibex or PCIbex: what definition do you use? Using this definition, your code (with 5) works perfectly for me:

function SepWithN(sep, main, n) {
    this.args = [sep,main];

    this.run = function(arrays) {
        assert(arrays.length == 2, "Wrong number of arguments (or bad argument) to SepWithN");
        assert(parseInt(n) > 0, "N must be a positive number");
        let sep = arrays[0];
        let main = arrays[1];

        if (main.length <= 1)
            return main;
            
        else {
            let newArray = [];
            while (main.length){
                for (let i = 0; i < n && main.length>0; i++)
                    newArray.push(main.shift());
                for (let j = 0; j < sep.length; ++j)
                    newArray.push(sep[j]);
            }
            return newArray;
        }
    };
}
function sepWithN(sep, main, n) { return new SepWithN(sep, main, n); }

NB: since you have PennController.ResetPrefix(null) at the top of your script, you don't need to have the PennController. prefix on any of the commands below, ie you can replace PennController.Sequence with Sequence, PennController.CheckPreloaded with CheckPreloaded, and so on

Jeremy

[Jeremy]

Hi,

You can’t control the cursor’s position, as that would pose serious security issues. You could, in theory, center the image at the cursor’s coordinates, but that’s not how I wrote the DragDrop element. What you could do to modify the behavior of the DragDrop element is upload PennElement_dragdrop.js to your project’s Modules folder, and look for these lines in the file:

start = {x: ev.clientX, y: ev.clientY, top: rect.top, left: rect.left, 
        old_top: ev.target.style.top, old_left: ev.target.style.left, old_position: ev.target.style.position};
$(ev.target).css({position: 'fixed', top: rect.top, left: rect.left});

and replace them with:

const newtop = ev.clientY - rect.height/2, newleft = ev.clientX - rect.width/2;
start = {x: ev.clientX, y: ev.clientY, top: newtop, left: newleft, 
        old_top: ev.target.style.top, old_left: ev.target.style.left, old_position: ev.target.style.position};
$(ev.target).css({position: 'fixed', top: newtop, left: newleft});

You’ll get a warning that the element type DragDrop is defined more than once when test-running the experiment, but other than that it should work as expected

Jeremy

[Jeremy]

Hi Jones,

Do you get a warning when you download your results file saying that some rows might be missing?

I don’t see any issues with your code and am unable to reproduce the problem

Jeremy

[Jeremy]

Hi,

Just pass the label of the trial you want to jump to in jump:

newTrial("Page3",
    defaultText.css("font-size", "1.2em").center().print()
    ,
    newText(" hello world ")
    ,
    newButton("come back")
        .center()
        .callback( jump("Page2") , end() )
        .print()
    ,
    newButton("testtt", "Continue")      
        .center()
        .css({"margin-top" : "50px"})
        .print()
        .wait()
)

newTrial("Page4",
    defaultText.css("font-size", "1.2em").center().print()
    ,
    newText(" hello world 2.0 ")
    ,
    newButton("come back")
        .center()
        .callback( jump("Page3") , end() )
        .print()
    ,   
    newButton("testtt", "Continue")      
        .center()
        .css({"margin-top" : "50px"})
        .print()
        .wait()
)

Jeremy

[Jeremy]

Hi Susanne,

Delete or comment out this line in PennController.css in the Aesthetics folder: width: 40em !important;

Jeremy

[Jeremy]

Hi,

You could add these three lines at the end of your script to get the coordinates of the visual elements at the end of the trial:

newVar("manXY").log().set(v=> JSON.stringify(getImage("man")._element.jQueryElement[0].getBoundingClientRect()).replace(/[,"{}]/g,'') ),
newVar("boyXY").log().set(v=> JSON.stringify(getImage("boy")._element.jQueryElement[0].getBoundingClientRect()).replace(/[,"{}]/g,'') ),
newVar("figlistXY").log().set(v=> JSON.stringify(getCanvas("figlist")._element.jQueryElement[0].getBoundingClientRect()).replace(/[,"{}]/g,'') )

Jeremy

[Jeremy]

Thank you for identifying and reporting this bug! As I’ve said in your other topic, I will work on fixing it for the next release of PennController

Jeremy

[Jeremy]

Hi,

Thank you for identifying this nasty bug! I’ll make sure it doesn’t happen in the next version of PennController. In the meantime, you should create the MouseTracker element at the beginning of your trial (newMouseTacker) and only start it later, possibly after end(), using getMouseTracker to refer back to it

Jeremy

[Jeremy]

Hello,

PCIbex itself has no such limits, but browsers only support a limited range of video file formats (as listed on the page you referenced) and might have limits on the size of the video files, but that last point will depend on specific configuration points (in general, the limits on size are large enough that they will never be a problem for an experiment)

If your 20+ videos of 4-6s each total to over 1GB, the problem won’t necessarily be the size limit of the browser, but rather how long it takes to download them. With a 720p resolution using the H264 (MP4) compression, a 5s video file shouldn’t be more than 2MB so a total of, say, 30 such videos should represent ~60MB max

I personally wouldn’t participate in a study if I knew it means I have to download more than a few 100MB of resources (and much less if I’m paying for data pro rata)

Jeremy

[Author]

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