About recording key response reaction time

[xkyan]

Hi Jeremy!

I encountered a problem in recording the key response time.

    // set key response
    newKey("flan_RespKey", "FJ")
        .log("flan_RespKey", getKey("flan_RespKey"))
        .wait()
        .callback(
            getVar("RT1").set( v => Date.now() - v )
                .log( "flanRT" , getVar("RT1") )
        )
    ,
    // record RT
    getVar("RT1").set( v => Date.now() - v )
        .log( "flanRT" , getVar("RT1") )

What I want to have in the result file is a column “flanRT” that records the duration that subjects take to press on either F or J. Currently what I have is “Wait success” in the result file. I understand that we can always calculate it by subtracting the event times. I’m just curious if we can get this calculated results in the result file directly. Thank you for your help in advance!

Best,
Karen

[Jeremy]

Hi Karen,

You don’t need the callback here, since you already have a wait that ensures that the following code will always be executed after the key has been pressed

You also seem to confuse key.log and var.log with newTrial().log

newTrial(
    // ...
    newVar("RT1").global().set( () => Date.now() )
    ,
    newKey("flan_RespKey", "FJ")
        .log()
        .wait()
    ,
    getVar("RT1").set( v => Date.now() - v )
    // ...
)
.log("flanRT",getVar("RT1"))

Jeremy

[Author]

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