Imagine that you are in an unfamiliar place and you cannot see or hear; or what you can manage to see and hear is highly distorted. Without warning, unfamiliar people are pulling you from one place to another; taking you to different activities that you cannot make sense of with your limited information. In addition, you may have few communication skills and can only express yourself through your behaviors. Your response may be one of panic and lashing out… and this is the experience that many children who qualify as deafblind go through every day.
Deafblindness creates a “disability of access” to visual and auditory information about the environment (people, things, events) that is necessary for learning, communication and development (Alsop et al., 2007, p.1). Most people learn through both direct instruction and incidental learning using their vision and hearing with little effort. For individuals with deafblindness, that information is either not available or is incomplete, distorted and unreliable. Even seemingly mild simultaneous vision and hearing losses can have a profound effect on a student and their ability to learn (Huebner, Prickett, Welch, & Joffee, 1995).
A skilled intervener is often necessary to provide access to information and address the unique learning needs of students who have combined vision and hearing losses. An intervener is usually a paraeducator who has specialized training and skills in deafblindness and works consistently one-to-one with the student. Working under the supervision of a classroom teacher, or another individual responsible for implementing a student's IEP, an intervener has four major roles:
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- to facilitate access to environmental information;
- to facilitate the development and/or use of the student’s receptive and expressive communication skills;
- to develop and maintain a relationship that promotes social and emotional well-being for the student who is deafblind; and,
- provide support to help a student form relationships with others and increase social connections and participation in activities (Alsop et al., 2007).
In school settings, the intervener serves as a member of the student’s educational team and provides a means of gaining access to the curriculum for that student. In the IEP, interveners might be listed as a “related service” or as a “supplementary aid and service”. For more information, or to share this information with others, download our "Interveners: What you need to know" brochure.



An intervener provides a bridge to the world for the student who is deafblind. The intervener helps the student gather information, learn concepts and skills, develop communication and language, and establish relationships that lead to greater independence. The intervener is a support person who does with, not for the student. Specialized training is needed to become an effective intervener and should address a wide range of topics necessary to understanding the nature and impact of deafblindness, the role of the intervener, and appropriate educational strategies to work with students with combined vision and hearing loss (Alsop, Killoran, Robinson, Durkel, & Prouty, 2004; McGinnes, 1986; Robinson et al., 2000).