| Discrete trial training | Highly structured adult-directed applied behavior analysis approach to teaching students with autism spectrum disorders using massed trials.
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| Echolalia | The repetition of others' words or phrases.
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| Echopraxia | The repetition of others' gestures and movements.
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| Facilitated communication | An alternative means of communication in which students are given physical and emotional support to type on an electronic keyboard or point at letters on an alphabet board.
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| Hidden curriculum | The unwritten social conventions of a school or class that typical students intuitively comprehend.
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| Home base | A place in the school where the student can go to escape stress; prevent tantrums, rage, meltdowns or shutdowns; or regain control after a tantrum, rage or meltdown.
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| Incidental teaching | Method of instruction that uses applied behavior analysis to teach preacademic skills within typical early childhood activities in preschools or home settings instead of sitting face-to-face with the child at a table in a clinical setting.
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| Hypotonia | The loss of muscle tone.
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| Motor stereotypies | Repetitive motor movements such as hand flapping.
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| Neologisms | Made-up words. Students with autism sometimes use them.
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| Palilalia | The repetition of one's own words.
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| Picture Exchange Communication System | A systematic behavior program that teaches children to use pictures to communicate their needs and desires through approaching a communication partners and exchanging a symbol for the actual object.
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| Pivotal response teaching | A modified discrete trial format that relies on interspersed mastery trials using natural reinforcement and child-selected materials.
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| Savant syndrome | A condition occurring in approximately 10% of individuals with autism in which extraordinary abilities in areas such as art, music, and mathematics are displayed.
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| Social Stories | Short stories with simple sentences and optional illustrations about specific, commonly encountered social situations.
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| Theory of mind | The ability of an individual to see the world from the perspective of others.
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