Before revision:   We then report a validation study, which utilizes our recently introduced open-source software (DECSYS) to administer an electronic interval-valued survey.
After revision:  The information captured by the response interval may represent a possible response range - i.e., a conjunctive set, such as the real numbers between three and six. Alternatively, it may reflect uncertainty in respect to a distinct response - i.e., a disjunctive set, such as a confidence interval. We then report a validation study, which utilizes our recently introduced open-source software (DECSYS) to administer an electronic interval-valued survey.