Wait for word

Hello everyone,


I'm trying to build a task where an picture is shown and the participant has to write a description of what they see. I would like the trial to end when the participant writes a certain word (which is not communicated to the participant) during his description, without the participant having to press enter, and collect the reaction time when he writes the word. Is it possible to program this task?
Here is the script I have written so far. As it is written it only returns the text and the reaction time at the moment when enter is pressed.



options
fullscreen
resolution 1100 800
background color white

bitmaps
pic pic.png
empty_box empty_box.png

table my_words
"word" 1

task pic
table my_words
show bitmap pic 0 0
show bitmap empty_box 0 250
text color black
readkeys option size 100
readkeys option show -400 250
readkeys @1 100000
clear screen
if STATUS == CORRECT
set $x @2
fi
if STATUS == WRONG
set $x 0
fi
delay 1000
clear -1
delay 1000
save WORD RT $x

block test
tasklist
pic 1
end



I thank in advance those who will answer me.