Millisecond Forums

Hi Dave,

I would really appreciate if you can help me solve the following issue with my script.

It uses a list of multipliers at / items = (1, 1, -1) to set probabilities for the score to go up or down. However, it says "Guess was Correct" in the feedback screen after a trial had a multiplier of -1, but I want it to say "Guess was Incorrect" for -1 multipliers and "Guess was Correct" for +1 multipliers.

It reports the difference in the feedback screen correctly, so that's not an issue.

I've tried to add && values.multiplier = 1 to the condition in the first line of /ontrialend, so it becomes:  if (trial.trial1.correct && values.multiplier =1), but that doesn't seem to resolve the issue either.

The script is as follows:

<values>
/ score = 0
/ multiplier = 0
/ diff = 0
/ acc = ""
/ ncorrect = 0
/ n = 0
/ cx = 50%
</values>

<list prob>
/ items = (1, 1, -1)
/ selectionmode = random
/ replace = true
</list>

<trial trial1>
/ ontrialbegin = [    
    values.n += 1;
  values.ncorrect += trial.trial1.correct;
    
    values.multiplier = list.prob.nextvalue;
]
/ ontrialend = [
        if (trial.trial1.correct) {
        values.multiplier = list.prob.nextvalue;
   values.score += values.multiplier * 10;
        values.diff = 0;
        values.diff = values.multiplier * 10;
        values.acc = "Correct";
  }
    
    else {
        values.score += values.multiplier * 5;
        values.diff = 0;
        values.diff += values.multiplier * 5;
        values.acc = "Incorrect";
    }
    
]
/ stimulusframes = [1=stim, score]
/ inputdevice = keyboard
/ validresponse = ("z", "x")
/ correctresponse = ("z")
/ branch = [
    {
        trial.feedback
    }
]
</trial>

<text stim>
/ items = ("A", "E", "I", "O", "U")
/ hposition = values.cx
</text>

<list x>
/ items = (50%)
/ selectionrate = always
</list>

<trial feedback>
/ stimulusframes = [1=clearscreen, fb, score, diff, acc]
/ timeout = 3500
</trial>

<text fb>
/ items = ("Performance: <%values.ncorrect%> out of <%values.n%> trials correct.")
/ fontstyle = ("Arial", 21pt, true)
/ size = (80%, 10%)
/ erase = false
/ position = (50%, 85%)
</text>

<text diff>
/ items = ("Score changed by: <%values.diff%>")
/ fontstyle = ("Arial", 21pt, true)
/ position = (50%, 50%)
</text>

<text acc>
/ items = ("Guess was: <%values.acc%>")
/ fontstyle = ("Arial", 21pt, true)
/ color = black
/ size = (80%, 20%)
/ position = (50%, 35%)
</text>

<text score>
/ items = ("Score: <%values.score%>")
/ fontstyle = ("Arial", 21pt, true)
/ size = (80%, 20%)
/ erase = false
/ position = (50%, 75%)
</text>

<block start>
/ trials = [1-30 = trial1]
</block>

Your help will be much appreciated!