<P> While applying the Bayley Scales of Infant Development (BSID - II), it was found that scales may lead to under - estimates of cognitive abilities in infants with Down's syndrome . Researchers excluded a number of items that implicated language, motor, attentional and social functioning from the original measures the modified form was administered to 17 infants with Down's syndrome and to 41 typically developing infants . Results suggested the modified version provided a meaningful and stable measure of cognitive functioning in infants with Down's syndrome . </P> <P> Researchers assessed the predictive validity of the BSID - II Mental Development Index (MDI) for cognitive function at school age for infants born with extremely low birth weight (ELBW). Data was studied from the BSID - II tests of 344 ELBW infants admitted to the neonatal intensive care unit at the Rainbow Infants and Children's Hospital in Cleveland, OH from 1992 - 1995 . It was found that the predictive validity of a subnormal MDI for cognitive function at school age is poor but better for ELBW children who have neurosensory impairments . This brought on concern that decisions to provide intensive care for ELBW infants in the delivery room might be biased because of reported high rates of cognitive impairments . </P> <P> The Bayley Scales of Infant and Toddler Development--Third Edition (Bayley - III) is a revision of the frequently used and well - known Bayley Scales of Infant Development--Second Edition (BSID - II; Bayley, 1993). Like its prior editions, the Bayley - III is an individually administered instrument designed to measure the developmental functioning of infants and toddlers . Other specific purposes of the Bayley - III are to identify possible developmental delay, inform professionals about specific areas of strength or weakness when planning a comprehensive intervention, and provide a method of monitoring a child's developmental progress . The most significant revision to the Bayley - III is the development of five distinct scales (as compared to three scales in the BSID - II) to be consistent with areas of appropriate developmental assessment for children from birth to age 3 . Whereas the BSID - II provided Mental, Motor, and Behavior scales, the Bayley - III revision includes Cognitive, Language, Motor, Social - Emotional, and Adaptive Behavior scales . Considering that the primary intent of the Bayley - III is to identify children experiencing developmental delay and not to specifically diagnose a disorder, the floor and ceiling of the subtest and total test appear to be adequate . As would be expected from an adaptive behavior measure (i.e., ABAS - II) that was developed independently of the Bayley - III, the floor for the Adaptive Behavior scale extends downward to a composite score of 40 (extending upwards to a score of 160), whereas the remaining Bayley - III floor composite scores are relatively higher (Cognitive, 55 - 145; Language, 47 - 153; Motor, 46 - 154; Social - Emotional, 55 - 145). One area that was not improved, however, are the subtest floor scores for the youngest children in the sample (i.e., those aged 16 to 25 days). Likewise, when a 2011 study was conducted comparing the relationship between test scores using the second and third editions of the Bayley Scales in extremely preterm children, it was concluded that interpreting these scores should be done with caution as the correlation with the previous edition appears worse at lower test score values . </P> <P> The relationship between abnormal feeding patterns and language patterns and language performance on the BSID - III at 18--22 months among extremely premature infants was evaluated . 1477 preterm infants born at <26 weeks gestation completed an 18 - month neurodevelopmental follow - up assessment including the Receptive and Expressive Language Subscales of the BSID - III . Abnormal feeding behaviors were reported in 193 (13%) of these infants at 18--22 months . It was determined with the help of the BSID - III that at 18 months adjusted age, premature infants with a history of feeding difficulties are more likely to have a language delay . </P>

A high score on the bayley mental scale
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