Systems and methods for attribute determination in a usability study are provided. The system includes the ability to collect screener questions and response pairs and determine the type of question. The question and response pairs may be processed for topic and entity extractions using machine learning (ML) models. From the collected topics and entities, a dictionary of attributes may be generated and eventually expanded/added to as new information regarding the participant becomes available. This attribute dictionary may take the form of a vector dictionary, in some particular embodiments. In some cases, the type of question being posed may dictate how the response is processed. These include a Boolean style question, a quantitative question, a single response question and a multi-response type question.