Problem with remembering the previous total payoff in Iowa Gambling Task (IGT)

[Fan]

Dear David,

Thanks for your reply!

I figure it out! The problem is the "Initialization" InLine, I put it in
the wrong position before.

Thanks!

Fan


On Mon, Sep 16, 2013 at 9:22 PM, David McFarlane <mcfarla9 at msu.edu> wrote:

> Fan,
>
> Couldn't quite follow all of this.  But whenever someone has a problem
> with their program retaining previous values, I suspect that they failed to
> properly use a global variable to hold the value.  See the "Using E-Basic"
> chapter in the User's Guide that came with E-Prime.
>
> BTW, shouldn't the line
>         Total = 2000+Total+Youwon- Youlost
> instead read
>         Total = Total+Youwon- Youlost
> ?  And shouldn't Total be initialized somewhere once to 2000?
>
> -----
> David McFarlane
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>
> At 9/16/2013 08:55 AM Monday, Fan W wrote:
>
>> I am using the e-prime to modify the IGT. Everything is working fine
>> except that the previous total payoff cannot be remembered. This leads to a
>> problem that every time a new card is selected, the total payoff is not
>> added from the previous total payoff in the last trial but is added from
>> $2000 in each trial. For example:
>>
>> Subjects start with $2000,
>>
>> Trial no.1: Won $ 100; Lost $0; so the Total is $2000+$100-$0= $2100
>> Trial no.2: Won $100; Lost$300; so the Total should be
>> $2100+$100-$300=$1900
>>
>> BUT, in my design, the Total is $2000+$100-$300=$1800
>>
>> The script I wrote in InLine object of the Total payoff calculation is:
>>
>>
>> If strHit="Image1" then
>> List 1.run c
>>
>> Youwon=List1.GetCurrentAttrib ("Gaintrial")
>> Youlost=List1.GetCurrentAttrib ("Losstrial")
>> Total = 2000+Total+Youwon- Youlost
>>
>> ("Image1" is Deck A.
>>  "If strHit...means if the mouse click on Deck A, then run List1"
>> "List 1" is the payment schedule of Deck A.
>> "Youwon" is the amount of money won in each trial.
>> "Youlost" is the amount fo money lost in each trial.
>> "Gaintrial" is the attribute of List1 and is the winning schedule of Deck
>> A.
>> "Losstrial" is the attribute of List1 too and is the losing schedule of
>> Deck A.)
>>
>> The amount of "Youwon" "Youlost" and "Total" are displayed on the
>> feedback slide.
>>
>>
>> I am not sure where  I am wrong, so I hope people who know how to solve
>> this problem may help me out!
>>
>> Thank you very much!
>>
>> Fan
>>
>
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