1. A computer-implemented method of automatically evolving survey questions, comprising: receiving, at a processor, a first set of textual responses to at least one open-ended question in a survey; reformatting the first set of textual responses as a set of possible textual responses in the form of closed-ended questions with numerical ratings as options; storing the set of possible textual responses in a memory in communication with the processor; selecting and transmitting a subset of the set of possible textual response to survey recipients; receiving, at the processor, participant numerical ratings for the possible textual response; using the processor to generate a confidence measure for each possible textual response based upon the participant numerical ratings; generating a ranked list using the confidence measure, with the processor; storing the ranked list of textual responses; and converting at least one of the original open-ended questions in the initial version of the survey to a closed-ended question, using a subset of the textual responses provided.