DMDX Help.
Decrement Counter If Correct Keyword
<DecrementIfCorrect N>
<decic N>
Subtracts one from counter number N if the RT is correct.
Conditional arithmetic keywords (<incic>,
<inciw>,
<incinr>,
<decic>,
<deciw>,
<decinr>)
are evaluated after the item is displayed. See the Set Counter
keyword.
DMDX Index.