Combing text and regex in test.text() – PennController for IBEX

Tagged: regex, TextInput

This topic has 2 replies, 2 voices, and was last updated 5 years ago by grusha.prasad.

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June 7, 2021 at 11:32 am #7024
grusha.prasad
Participant
Hi,

I want to run a sentence completion experiment where participants are presented with a partial sentence and their task is to re-type the prompt and complete the sentence. Before allowing participants to continue to the next prompt, I want to check that they have typed out the prompt correctly along with at least one other word. Right now I have something like the code below and it does not let me progress. If I replace the regex with ” ” , then it does let me progress when I repeat the prompt and insert a space after. Similarly if I have just the regex, it lets me progress as long as I type a single word. Could you please point out what I am doing wrong? Thank you!
```
newText("Prime", row.prime)
        .settings.center()
        .print()
    ,

    newVar("RT_prime").global().set( v_prime => Date.now())
    ,
    
    
    newTextInput("response")
      .print()
    ,
    
    newButton("continue", "Next prompt")
        .settings.center()
        .settings.log()
        .print()
        .wait( getTextInput("response").test.text(row.prime+/\w+/) )
        .remove()
```
June 7, 2021 at 12:04 pm #7029

Jeremy
Keymaster

Hi,

Regular expressions (built either using /slashes/ like you do, or with the RegExp constructor) are not Strings in javascript, so you cannot just concatenate a string (row.prime) with a regular expression /\w+/). You can, however, pass a literal string to the RegExp constructor, which it will interpret as a pattern to build the regular expression: getTextInput("response").test.text( new RegExp(row.prime+"\s+\w+", 'i') ) (I added \s+ to require at least one space after the prime, and used 'i' to make it case-insensitive, assuming it shouldn’t matter whether the participant uses upper- or lower-case)

Jeremy

June 7, 2021 at 12:26 pm #7032

grusha.prasad
Participant

Thank you so much for the quick and helpful response! Just a note in case someone sees this in the future: I had to replace "\s+\w+" with "\\s+\\w+". But once I did that, this worked perfectly.
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