A postal survey of parents was conducted at ‘around the time of their child’s third birthday’, consisting of a set of separate screening questionnaires and a further questionnaire about their child’s current or past language problems (hereafter, Parent report). Completion rate ranged from 90 – 98.8% across the five questionnaires. Five screening questionnaires were evaluated: (1) General Language Screen (GLS), containing 9 items translated to Dutch from English; (2) a portion of the Van Wiechen classification scheme (VW), containing 6 items; (3) Language Screening Instrument-Parent Form (LSI-PF), containing 4 items; (4) Language Screening Instrument-Child Test (LSI-CT), containing 28 items; and, (5) a Visual analogue scale (VAS), asking parents to ‘mark the place on the line below which you feel accurately represents your child’s language development compared to his or her peers’.