AAC tools and devices aim to facilitate, supplement, or replace verbal speech.
Picture exchange systems, communication boards, choice cards, and speech generating devices are all examples of AAC options.
AAC isn't just for people who have motor impairments which limit their verbal speech. AAC can also be used for individuals with Autism Spectrum Disorder, Developmental Delays, or Cognitive Disabilities.
Visual perception is a cognitive process that gives meaning to all of the things we see every day. It differs from visual acuity which is how clearly you can see at a given distance. Specific visual perceptual skills include: spatial relations (how objects are positioned to each other), figure ground (being able to tell foreground from background), visual memory (retaining a "mental image" of an object or series of symbols), visual closure (knowing what an object or image is even if a part is missing), form constancy (recognizing that objects and symbols remain the same regardless of their position), and visual rotation (the ability to mentally manipulate the orientation of a symbol/object). These skills are critically important for safe and efficient mobility, eye-hand coordination skills such as handwriting, and for higher level skills in math and reading.