Millisecond Forums » Millisecond Forums » Inquisit 5 » Counting Errors

Counting Errors

Gaurav Krishnamoorthy — Tue, 09 May 2017 21:39:42 GMT

Hi !

We are looking for an expression that would start counting the participant's errors only after the first error. It would be great if you could help us code this.

Thank you for your help!

Here is a segment of our script...

...

/1="Blackrectangle.jpg"

</item>

/1="block1.001.jpg"

</item>

/1="block1.002.jpg"

</item>

/items=b0

/position=(50,50)

/size= (100%, 100%)

/erase=false

</picture>

/items= b1

/position= (50,50)

/size= (100%, 100%)

/erase=false

</picture>

/items=b2

/position= (50,50)

/size= (100%, 100%)

/erase=false

</picture>

/ stimulustimes = [0=b1; 500=b0]

/inputdevice=keyboard

/correctresponse=("a")

/validresponse = ("a","l")

/timeout=2200

/beginresponsetime=0

/recorddata = true

/ontrialend=[ if (trial.b1.correct) values.earnings +=1 else values.losses -=1]

</trial>

/stimulustimes = [0=b2; 500=b0]

/inputdevice= keyboard

/correctresponse= ("l")

/validresponse = ("a","l")

/timeout=2100

/beginresponsetime=0

/recorddata = true

/ontrialend=[ if (trial.b2.correct) values.earnings +=1 else values.losses -=1]

</trial>

/trials= [1=sequence (startpractice,b1,b2)]

/ screencolor = (0, 0, 0)

/ recorddata = false

/ postinstructions = (practiceSummary)

</block>

/earnings=0

/losses=0

/earningstest=0

/lossestest=0

</values>

^^ FEEDBACK

^^ Total = $<%(values.earningstest+values.lossestest)%>

</page>

<expt>

/blocks=[1=practice]

</expt>

RE: Counting Errors

Dave — Tue, 09 May 2017 21:39:42 GMT

[quote]

[b]Dave - Tuesday, May 9, 2017[/b]

[quote]

[b]Gaurav Krishnamoorthy - Tuesday, May 9, 2017[/b]

Hi !

We are looking for an expression that would start counting the participant's errors only after the first error. It would be great if you could help us code this.

Thank you for your help!

Here is a segment of our script...

...

/1="Blackrectangle.jpg"

</item>

/1="block1.001.jpg"

</item>

/1="block1.002.jpg"

</item>

/items=b0

/position=(50,50)

/size= (100%, 100%)

/erase=false

</picture>

/items= b1

/position= (50,50)

/size= (100%, 100%)

/erase=false

</picture>

/items=b2

/position= (50,50)

/size= (100%, 100%)

/erase=false

</picture>

/ stimulustimes = [0=b1; 500=b0]

/inputdevice=keyboard

/correctresponse=("a")

/validresponse = ("a","l")

/timeout=2200

/beginresponsetime=0

/recorddata = true

/ontrialend=[ if (trial.b1.correct) values.earnings +=1 else values.losses -=1]

</trial>

/stimulustimes = [0=b2; 500=b0]

/inputdevice= keyboard

/correctresponse= ("l")

/validresponse = ("a","l")

/timeout=2100

/beginresponsetime=0

/recorddata = true

/ontrialend=[ if (trial.b2.correct) values.earnings +=1 else values.losses -=1]

</trial>

/trials= [1=sequence (startpractice,b1,b2)]

/ screencolor = (0, 0, 0)

/ recorddata = false

/ postinstructions = (practiceSummary)

</block>

/earnings=0

/losses=0

/earningstest=0

/lossestest=0

</values>

^^ FEEDBACK

^^ Total = $<%(values.earningstest+values.lossestest)%>

</page>

<expt>

/blocks=[1=practice]

</expt>

[/quote]

Where do you count errors specifically? And -- if you count them -- why can't you just subtract one from the final count?

[/quote]

Working of a guess / incomplete understanding: My assumptions are:
(1) You always want to increase values.earnings in case of a correct response.
(2) You want to decrease values.losses in case of a wrong response, but only if the participant has already made at least one error.

If so:

Introduce a new variable where you explicitly count the errors

<values>
/ errorcounter = 0
...
</values>

Always increase that counter in case of an error and decrease values.losses only if the errorcounter is greater than 1.

<trial b1>
/ stimulustimes = [0=b1; 500=b0]
/inputdevice=keyboard
/correctresponse=("a")
/validresponse = ("a","l")
/timeout=2200
/beginresponsetime=0
/recorddata = true
/ ontrialend = [ if (trial.b1.correct) values.earnings +=1]
/ ontrialend = [ if (trial.b1.error) values.errorcounter += 1]
/ ontrialend = [ if (trial.b1.error && values.errorcounter > 1) values.losses -= 1]
</trial>

/stimulustimes = [0=b2; 500=b0]

/inputdevice= keyboard

/correctresponse= ("l")

/validresponse = ("a","l")

/timeout=2100

/beginresponsetime=0

/recorddata = true

/ ontrialend = [ if (trial.b2.correct) values.earnings +=1]
/ ontrialend = [ if (trial.b2.error) values.errorcounter += 1]
/ ontrialend = [ if (trial.b2.error && values.errorcounter > 1) values.losses -= 1]

</trial>

RE: Counting Errors

Dave — Tue, 09 May 2017 21:23:40 GMT

[quote]

[b]Gaurav Krishnamoorthy - Tuesday, May 9, 2017[/b]

Hi !

We are looking for an expression that would start counting the participant's errors only after the first error. It would be great if you could help us code this.

Thank you for your help!

Here is a segment of our script...

...

/1="Blackrectangle.jpg"

</item>

/1="block1.001.jpg"

</item>

/1="block1.002.jpg"

</item>

/items=b0

/position=(50,50)

/size= (100%, 100%)

/erase=false

</picture>

/items= b1

/position= (50,50)

/size= (100%, 100%)

/erase=false

</picture>

/items=b2

/position= (50,50)

/size= (100%, 100%)

/erase=false

</picture>

/ stimulustimes = [0=b1; 500=b0]

/inputdevice=keyboard

/correctresponse=("a")

/validresponse = ("a","l")

/timeout=2200

/beginresponsetime=0

/recorddata = true

/ontrialend=[ if (trial.b1.correct) values.earnings +=1 else values.losses -=1]

</trial>

/stimulustimes = [0=b2; 500=b0]

/inputdevice= keyboard

/correctresponse= ("l")

/validresponse = ("a","l")

/timeout=2100

/beginresponsetime=0

/recorddata = true

/ontrialend=[ if (trial.b2.correct) values.earnings +=1 else values.losses -=1]

</trial>

/trials= [1=sequence (startpractice,b1,b2)]

/ screencolor = (0, 0, 0)

/ recorddata = false

/ postinstructions = (practiceSummary)

</block>

/earnings=0

/losses=0

/earningstest=0

/lossestest=0

</values>

^^ FEEDBACK

^^ Total = $<%(values.earningstest+values.lossestest)%>

</page>

<expt>

/blocks=[1=practice]

</expt>

[/quote]

Where do you count errors specifically? And -- if you count them -- why can't you just subtract one from the final count?