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The dopamine transporter (DAT) is a target of amphetamine (AMPH) and cocaine. These psychostimulants attenuate DAT clearance efficiency, thereby increasing synaptic dopamine (DA) levels. Re-uptake rate is determined by the number of functional transporters at the cell surface as well as by their turnover rate. Here, we present evidence that DAT substrates,(More)
Father-child and mother-child engagements were examined longitudinally in relation to children's language and cognitive development at 24 and 36 months. The study involved a racially/ethnically diverse sample of low-income, resident fathers (and their partners) from the National Early Head Start evaluation study (n=290). Father-child and mother-child(More)
Children with disabilities (CWDs) are more likely to be victims of child abuse but may have more difficulty than their typically developing (TD) peers reporting their experiences. In this study, the authors examined the characteristics of abuse reported by CWDs based on forensic statements made by 40430 alleged abuse victims, 11% categorized as children(More)
Seventy 15-month-old infants were studied at home before starting child care, during adaptation (mothers present) and separation (first 9 days without mothers) phases, and 5 months later. Security of infant-mother attachment was assessed before and 3 months after child care began. In the separation phase, salivary cortisol rose over the first 60 min(More)
Researchers have shown that the five major dimensions of personality (extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience) and two additional factors (irritability and positive activity) are evident from adolescence. This study attempted to replicate and extend these results in a longitudinal study of 102 Swedish(More)
African American mothers' and fathers' availability, caregiving, and social behaviors toward their infants in and around their homes were examined. Twenty lower, 21 middle, and 21 upper socioeconomic families and their 3- to 4-month-old infants were observed for 4 3-hr blocks between 8:00 a.m. and 8:00 p.m. on 4 different weekdays. With increasing economic(More)
24 infants and their preschool-aged siblings were observed in a laboratory playroom in the presence of their parents. Observations took place when the infants were 12 months old and again 6 months later. Analysis of the social behavior revealed that, at both ages, the children assumed differentiable roles in their interactions: The infants "followed" by(More)
A total of 145 children of 4 to 5, 6 to 7, 8 to 9, and 10 to 12 years of age were interviewed within 3 days, 1 month, 1 to 3 months, or 5 to 14 months after allegedly experiencing a single incident of sexual abuse. The proportion of substantive investigative utterances eliciting new details from the children increased with age and decreased after delays of(More)
20 first-born infants from low socioeconomic status (SES) families and 20 first-born infants from middle SES families in Costa Rica were observed for 12 hours when they were 14 weeks old. The goals of this study were the following: 1) to study the impact of length of observation and context on the authors measures of interactional engagement; 2) to compare(More)