recording responses using text_input
I'm trying to build a simple task, where participants need to solve as much simple math problems (like 2+3) in 3 minutes.
Right now I'm using text_input so participants will see the problem and what they are typing.
I need to know when participants corrected their response, because I need to consider these responses as errors.
How can I do it?
I'm attaching the current version of the file.