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PubMed1993

Effects of word predictability, child development, and aging on time-gated speech recognition performance.

This study examined the interaction of acoustic-phonetic information with higher-level linguistic contextual information during the real-time speech perception process in child, young adult, and older adult listeners. Five age groups were studied: (a) young children ranging in age from 5 to 7 years, (b) older children aged 8 to 10 years, (c) young adults aged 18 to 23 years, (d) older adults aged 60 to 69 years, and (e) older adults aged 70 to 83 years. All subjects were presented with time-gated monosyllabic target words presented in sentence contexts containing contrasting levels of word predictability. Findings indicated that target word predictability influenced the timing and nature of the real-time recognition process including the listeners' use of initial word sounds. Predictability-high (PH) words were recognized earlier and with greater confidence than predictability-low (PL) words. PH recognition performance was more influenced by child development and aging than PL recognition performance. Older adult listeners required more PH-gated word stimuli to produce accurate responses than younger adults. Older children showed more effective use of PH contexts than younger children.

Acoustic Stimulation↗
PubMed1975

Early child development in the context of mothering experiences.

This paper describes certain critical periods early in human development in the context of the child's coping responses to the environment, and in regard to the nature of the nurturing experience. The term critical period refers to the optimal time the young child is ready to learn or achieve a developmental task. But it does not imply an irreversible process, since the child usually has the capacity to compensate to some extent for mastery of a task occurring during a given critical period, even after that period has passed. Various areas of development are included to present a broad array of infantile capabilities: neuromuscular, perceptual, cognitive, and psychosocial.

Age Factors↗
PubMed1995

Unprovoked seizures and developmental disabilities: clinical characteristics of children referred to a child development center.

Few data are available on the risk of seizures in young children with developmental problems. A retrospective evaluation of 1,946 children 0-5 years of age referred to the Tel Aviv Child Development Center (CDC) between 1981 and 1990 was performed. The study was undertaken to determine the cumulative risk of unprovoked seizures in children referred to a CDC and to assess the risk factors associated with seizures in these children. The center serves the Tel Aviv area for a variety of developmental disabilities. Cumulative risk of seizures and risk factors were assessed using Kaplan-Meier methodology. Unprovoked seizures occurred in 58 patients (3%), including 10 with a single seizure and 48 with two or more seizures. Risk factors for seizures included cerebral palsy (CP) (relative risk [RR] = 28.7), neonatal seizures (RR = 15.2), mental retardation (MR) (RR = 7.8), febrile seizures (RR = 7.7), autism (RR = 3.2), and prematurity (RR = 2.7). The cumulative risk of seizures by age 5 years in children with MR, CP, and MR plus CP was 8%, 47%, and 68%, respectively, compared with 1% in those without MR or CP. On multivariate analysis, CP, MR, prior febrile seizures, and prematurity were associated with an increased risk of seizures. The risk of experiencing unprovoked seizures by age 5 in children with developmental disabilities is 3%, which is fourfold greater than that of the general population. Much of this increased risk is limited to selected subgroups with major disabilities. However, if neither MR nor CP is present, the 1% risk of developing unprovoked seizures by age 5 in children with other developmental problems is not substantially different from that expected in the general population.

Cerebral Palsy↗
PubMed2006

Childhood IQ in relation to obesity and weight gain in adult life: the National Child Development (1958) Study.

OBJECTIVE: To examine the relation of childhood intelligence (IQ) test results with obesity in middle age and weight gain across the life course. METHODS: We analysed data from the National Child Development (1958) Study, a prospective cohort study of 17 414 births to parents residing in Great Britain in the late 1950s. Childhood IQ was measured at age 11 years and body mass index (BMI), an indicator of adiposity, was assessed at 16, 23, 33 and 42 years of age. Logistic regression (in which BMI was categorised into obese and non-obese) and structural equation growth curve models (in which BMI was retained as a continuous variable) were used to estimate the relation between childhood IQ and adult obesity, and childhood IQ and weight gain, respectively. RESULTS: In unadjusted analyses, lower childhood IQ scores were associated with an increased prevalence of adult obesity at age 42 years. This relation was somewhat stronger in women (OR(per SD decrease in IQ score) [95% CI]: 1.38 [1.26, 1.50]) than men (1.26 [1.15, 1.38]). This association remains statistically significant after adjusting for childhood characteristics, including socio-economic factors, but was heavily attenuated following control for adult characteristics, particularly education (women: 1.11 [0.99, 1.25]; men: 1.10 [0.98, 1.23]). When weight gain between age 16 and 42 years was the outcome of interest, structural equation modelling revealed that education and dietary characteristics in adult life mediated the association with childhood IQ. CONCLUSIONS: A lower IQ score in childhood is associated with obesity and weight gain in adulthood. In the present study, this relation appears to be largely mediated via educational attainment and the adoption of healthy diets in later life.

Adolescent↗