Clear Feedback Keyword
Parameter and switch to set <cfb ""> <nfbt> <wfb ""> <tlfb ""> effectively clearing the display after a subject responds instead of trying to use Response Contingency to do it.
<clfb> sets all the feedback messages to blank spaces and displays them allowing a response contingent display so that the screen is cleared when the subject responds. I got tired of everyone wanting to turn response contingency on just to do this and having all of the
concomitant problems that a response contingent item file has. Setting
<nfb> doesn't display any feedback at all, the display is not erased by the subject's response.
There's no automatic way to restore feedback once <clfb>
has been used, instead you can reinstate the messages piecemeal and that might
be a bit of a pain if you want to do it a lot so I'd be using a
macro and because you're going to
want to have brackets in that macro you'd have to use the classic form of a
macro definition. At the start of your item file you'd want to include
m.noclfb.+<cfb "Correct"> <wfb "... Wrong ..."> <tlfb
"No response"> <nfbt 0>+
Then in your item file after a <clfb>
section you can put ~.noclfb. and you should
have feedback just like it usually is.