If they agreed to participate, they were given the scale, a pen and an envelope. Then they were left alone and the time to read and complete the questionnaire before placing it into the envelope was recorded.
Si aceptaban, se les entregaba la escala, un esfero y un sobre; se dejaban solos y se medía el tiempo que empleaban para leer y llenar el cuestionario hasta antes de introducirlo en el sobre.