Random Number Generator

[caljones]

Hi Jeremy,

Hope you are doing well. I am trying to insert a random number generator at the end of my experiment to be used as a Participant ID. Ideally, this number would be randomly generated and then presented to participants on a screen at the end of the trial, as well as recorded in the result file in each line of the experiment. However, I am unsure if I can retroactively add an ID line in each result file line, and I am also unsure how to embed a random number generator.

Thanks,
Callie

[Jeremy]

Hello Callie,

Sorry for the late reply, I was away from the office last week. What you can do is generate the random number at the beginning of the experiment, but present it only at the end. Here’s a dummy experiment for illustration purposes:

PennController.ResetPrefix(null) // Shorten command names (keep this line here)

uniqueID = [1,2,3,4].map(v=>Math.floor((1+Math.random())*0x10000).toString(16).substring(1)).join('-');

Header(
    // void
)
.log( "ID" , uniqueID )

newTrial("intro", newButton("Hello").print().wait() )
newTrial("experiment", newButton("World").print().wait() )
SendResults()
newTrial("end", newText("your id: "+uniqueID).print(),newButton().wait() )

Let me know if you need assistance adapting this to your case

Jeremy

[Author]

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