Copyediting sample 57:
Behavioral phenotype

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A behavioral phenotype is a characteristic cluster of behaviors that are associated with a specific syndrome. Some of these phenotypes are unusual and unique to the syndrome. Dykens et al., 2000 identifies as examples the extreme self-injury associated with Lesch-Nyhan syndrome, the high-level language abilities coupled with a lower overall intelligence level and poor visual spatial functioning associated with Williams syndrome, the hand wringing of Rett syndrome, the cat cry during infancy with cri-du-chat syndrome, the self-hugging and stuffing of objects into body orifices related to Smith-Magenis syndrome, or the food fixation and hyperphagia associated with Prader-Willi syndrome.

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A behavioral phenotype is a characteristic cluster of behaviors that are associated with a specific syndrome. Some of these phenotypes are unusual and unique to the syndrome. Dykens et al., 2000 identifies as Dykens et al. (2000) identify [References must conform to APA style; also, an "et al." reference is plural and takes a plural verb.] as examples the extreme self-injury associated with Lesch-Nyhan syndrome, the high-level language abilities coupled with a lower overall intelligence level and poor visual spatial functioning associated with Williams syndrome, the hand wringing of Rett syndrome, the cat cry during infancy with cri-du-chat syndrome, the self-hugging and stuffing of objects into body orifices related to Smith-Magenis syndrome, or the food fixation and hyperphagia associated with Prader-Willi syndrome.

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A behavioral phenotype is a characteristic cluster of behaviors that are associated with a specific syndrome. Some of these phenotypes are unusual and unique to the syndrome. Dykens et al. (2000) identify as examples the extreme self-injury associated with Lesch-Nyhan syndrome, the high-level language abilities coupled with a lower overall intelligence level and poor visual spatial functioning associated with Williams syndrome, the hand wringing of Rett syndrome, the cat cry during infancy with cri-du-chat syndrome, the self-hugging and stuffing of objects into body orifices related to Smith-Magenis syndrome, or the food fixation and hyperphagia associated with Prader-Willi syndrome.