| The total score is the number of patterns produced minus the number of perseverative errors. |
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| Additionally, they exhibited other unusual postures and perseverative behaviors and fail to evince normal separation anxiety when removed from their mothers. |
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| Autism is a neurobehavioural disorder characterized by impairment of social relatedness, delayed and disordered communication, and restricted, perseverative and stereotypic behaviour patterns occurring in young children. |
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| A perseverative error consists of a repetition of a design. |
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| In Section 2 we have established preferences for suffixal over prefixal morphology, and anticipatory over perseverative phonology. |
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| McGee and colleagues also noted improvement in quality of verbalizations, given that program entry verbalizations tended to be echolalic or perseverative speech. |
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| Perseverative errors and responses were significantly improved after intervention. |
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