this.getChoiceAnswerValue(); not a function???

I am playing around in prep for developing a soft-prompt in Qualtrics (because they do not have a feature for one) and I ran into a situation where the console is telling me 'this.getChoiceAnswerValue' is not a function.

1. I've hidden the 'NEXT' button and replaced it with a fake one
2. On click I am trying to have Qualtrics check answers on the question.
3. If the answer(s) are length of 0, flag the question as empty.)

`Qualtrics.SurveyEngine.addOnReady(function()
{
/*Place your JavaScript here to run when the page is fully displayed*/

/*Create the fakeNext button, copy NextButton styling, and then hide the NextButton*/
jQuery("#NextButton").after("<button type='button' class='NextButton Button' id='fakeNext' value='NEXT' title='NEXT' aria-label='NEXT'>NEXT</button>");
jQuery('#fakeNext').copyCSS('#NextButton');
jQuery("#NextButton").hide();

var empty = 0;

jQuery('#fakeNext').click(function(){
var answers = this.getChoiceAnswerValue();
console.log("Answers = " + answers);
if(answers.length=0){
empty = 1;
} else {
empty = 0;
}
console.log("Empty flag = " + empty);

});

});`

Is it not possible to use this.getChoiceAnswerValue(); at this point? Do I have something silly hiding in there that's messing me up?