The present document reporting a Visual Basic computer program for compute the Aiken's V coefficient, this used for quantification of the content validity, and their confidence interval in specified levels of previously Type I error rate. The construction of confidence intervals is performed using the score method, and it was published in Penfield and Giacobbi (2004). The growing use of this method and of the confidence interval approach is fitted to the request of improving the results in inferential statistic procedures for the psychological research. It is discussed their use in applied context. © Copyright 2009: Servicio de Publicaciones de la Universidad de Murcia. Murcia (España).