Gladys Williams, Luis Antonio Pérez-González, & Anna Beatriz Müller Queiroz (2005).
Using a combined blocking procedure to teach color discrimination to a child with autism.
Journal of Applied Behavior Analysis,
38, 555-558.
A combined blocking procedure was used to teach a child with autism to
select two colors on request. First, two color cards were placed at fixed
locations on a table and the experimenter repeatedly requested the child
to touch one of the colors. After 10 consecutive correct selections, the
child was asked to touch the other color. Blocks of trials with each color
were systematically thinned until requests were presented randomly with few
errors. Subsequently, the location of the selection cards was systematically
alternated until the child was able to touch the correct card when both
requests and card positions were presented in random fashion.
DESCRIPTORS: color discrimination, learning disabilities, autism, conditional discrimination