By uni-student92084 - 8/25/2020
Hello,
In my script, particpants will be rewarded 5 cents if they are correct and lose 5 cents if they are incorrect. My goal is to show the particpants a tally of the total amount of money they have earned on each trial.
With the code I have tried so far (shown below), the total monetary reward shows up and they gain 5 cents when they are correct, but instead of losing 5 cents when they are wrong, their amount stays the same.
<values>
/score =1.00
</values>
**In trial**
/ ontrialend = [values.score = values.score + 0.50 *trial. DemBE_O.correct]
**
<item tally>
/ 1 = "Total score: <% values.score%>"
</item>
<text tally>
/ items = tally
/ hposition = (80)
/ vposition = (20)
</text>
I realize that in /ontrialend=, it make sense for them to not lose points because 0.50 is multiplied by 0.
But if I wanted the tally of money to decrease by 5 cents, how would I do this? I am pretty sure I would have to use the expression element and maybe the if, else statments, but I am having trouble figuring out how to format it.
I will also attach the full script for more context.
Thank you in advance for your help!
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By Dave - 8/25/2020
+xHello, In my script, particpants will be rewarded 5 cents if they are correct and lose 5 cents if they are incorrect. My goal is to show the particpants a tally of the total amount of money they have earned on each trial. With the code I have tried so far (shown below), the total monetary reward shows up and they gain 5 cents when they are correct, but instead of losing 5 cents when they are wrong, their amount stays the same. <values> /score =1.00 </values> **In trial** / ontrialend = [values.score = values.score + 0.50 *trial. DemBE_O.correct] ** <item tally> / 1 = "Total score: <% values.score%>" </item> <text tally> / items = tally / hposition = (80) / vposition = (20) </text> I realize that in /ontrialend=, it make sense for them to not lose points because 0.50 is multiplied by 0. But if I wanted the tally of money to decrease by 5 cents, how would I do this? I am pretty sure I would have to use the expression element and maybe the if, else statments, but I am having trouble figuring out how to format it. I will also attach the full script for more context. Thank you in advance for your help!
You don't need the <expressions> element, all you need is a few simple if conditions in your /ontrialend logic.
/ ontrialend = [
if (trial.DemBI_P.correct) {
values.score += 0.50;
} else if (trial.DemBI_P.error) {
values.score -= 0.50;
}
]
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By uni-student92084 - 8/25/2020
+x+xHello, In my script, particpants will be rewarded 5 cents if they are correct and lose 5 cents if they are incorrect. My goal is to show the particpants a tally of the total amount of money they have earned on each trial. With the code I have tried so far (shown below), the total monetary reward shows up and they gain 5 cents when they are correct, but instead of losing 5 cents when they are wrong, their amount stays the same. <values> /score =1.00 </values> **In trial** / ontrialend = [values.score = values.score + 0.50 *trial. DemBE_O.correct] ** <item tally> / 1 = "Total score: <% values.score%>" </item> <text tally> / items = tally / hposition = (80) / vposition = (20) </text> I realize that in /ontrialend=, it make sense for them to not lose points because 0.50 is multiplied by 0. But if I wanted the tally of money to decrease by 5 cents, how would I do this? I am pretty sure I would have to use the expression element and maybe the if, else statments, but I am having trouble figuring out how to format it. I will also attach the full script for more context. Thank you in advance for your help! You don't need the <expressions> element, all you need is a few simple if conditions in your /ontrialend logic. / ontrialend = [ if (trial.DemBI_P.correct) { values.score += 0.50; } else if (trial.DemBI_P.error) { values.score -= 0.50; } ]
That makes sense, thank you Dave!
One question, what do the symbols += and -= mean? I am guessing they mean add and subtract from value.score, right?
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By Dave - 8/25/2020
+x+x+xHello, In my script, particpants will be rewarded 5 cents if they are correct and lose 5 cents if they are incorrect. My goal is to show the particpants a tally of the total amount of money they have earned on each trial. With the code I have tried so far (shown below), the total monetary reward shows up and they gain 5 cents when they are correct, but instead of losing 5 cents when they are wrong, their amount stays the same. <values> /score =1.00 </values> **In trial** / ontrialend = [values.score = values.score + 0.50 *trial. DemBE_O.correct] ** <item tally> / 1 = "Total score: <% values.score%>" </item> <text tally> / items = tally / hposition = (80) / vposition = (20) </text> I realize that in /ontrialend=, it make sense for them to not lose points because 0.50 is multiplied by 0. But if I wanted the tally of money to decrease by 5 cents, how would I do this? I am pretty sure I would have to use the expression element and maybe the if, else statments, but I am having trouble figuring out how to format it. I will also attach the full script for more context. Thank you in advance for your help! You don't need the <expressions> element, all you need is a few simple if conditions in your /ontrialend logic. / ontrialend = [ if (trial.DemBI_P.correct) { values.score += 0.50; } else if (trial.DemBI_P.error) { values.score -= 0.50; } ] That makes sense, thank you Dave! One question, what do the symbols += and -= mean? I am guessing they mean add and subtract from value.score, right?
Correct.They're the increment and decrement operators: https://www.millisecond.com/support/docs/v6/html/language/expressions/operators.htm
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