Concatenating variables and text

[mawilson]

Following this, I’ve set up my experimment to track participants’ first-guess accuracy in a forced-choice task where they are required to select the correct option before proceeding. This seems to be working perfectly!

However, I would also like to show participants their first-guess accuracy between training blocks if they haven’t done well enough. While I am able to get the text to display, I’m running into a weird bug, where the text after the variable’s value gets pushed to a new line. Here’s what it looks like:

I’d like it to all be on the same line.

Here’s the code; following the first link, responses stores the first-guess accuracy for each trial, and grandaverage is set to the average of that accuracy for each trial. required_to_pass is a variable currently set to 0.5.

newTrial('post-training',
    newVar('grandaverage')
        .global()
        .test.is(v => v >= required_to_pass)
        .failure(
            getVar('grandaverage')
                .set(getVar('responses'))
                .set(v => v.filter(r => r == true).length/v.length)
        )
    ,
    getVar('grandaverage')
        .test.is(v => v >= required_to_pass)
        .success(end())
    ,
    newVar('grandaveragepercent')
        .set(getVar('grandaverage'))
        .set(v => v * 100)
    ,
    newVar('responses').global().set([]),
    newText("Your first-guess accuracy was ")
        .after(
            newText()
                .text(getVar('grandaveragepercent'))
        )
        .after(newText('%.'))
        .center()
        .print()
    ,
    newButton('Next')
        .center()
        .print()
        .wait()
)

I’ve also tried adding the .after(newText('%.')) to the newText().text(getVar('grandaveragepercent')) instead, but I get the same result.

• This topic was modified 2 years, 2 months ago by mawilson. Reason: clarifications

[mawilson]

I’ve realized how to deal with my case; it’s actually pretty easy since JavaScript lets you use addition to concatenate variables of different types.

newVar('grandaveragepercent')
    .set(getVar('grandaverage'))
    .set(v => Math.round(v * 100) + '%.')

Then just display the text as before, minus the .after(newText('%.')).

(I’d still be curious how this would work if I had two text variables I wanted to concatenate, since IIRC the way variables work in PCIbex wouldn’t just let you do getVar('mytextvariable1') + getVar('mytextvariable2').)

[Jeremy]

Hi,

I’m glad you found a solution by yourself. You can use getVar("myvar")._element.value in a pure-javascript environment to retrieve the current value of the Var element, eg. getVar("mytextvariable1").set( v => v+getVar("mytextvariable2")._element.value )

Jeremy

[Author]

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