hopper groups can be explained by a single underlying mechanism, that is, the development of a set to respond (industriousness) or of a set to not respond (laziness). Presumably the treadle group learned that reinforcement is contingent on some response and they entered the autoshaping situation with a set or expectation that a similar contingency still applied. The hopper birds responded less ...

Sleep disturbances are regarded as a common clinical feature in autism and other Pervasive Developmental Disorders (PDD) that forms a great source of stress for families. Studies have shown that children with PDD exhibited qualitatively and quantitatively different sleep patterns to non autistic control children. This study aimed at describing sleep patterns in a sample of Egyptian children wit...

• Aromatase cytochrome P450 enzyme catalyzes the formation ofestrogenfrom androgen in distinct regions of the vertebrate brain. During neural development, local estrogen synthesis is required for the sexual differentiation of male brain characteristics and the differentiation of neural circuits Involved in sex-specific behaviors and neuro endocrine functions. A common phenomenon in all species ...

This study was designed to examine the prevalence, cognitive profile, and home literacy experiences in subtypes of Spanish developmental dyslexia. The subtyping procedure used comparison with chronological-age-matched and reading-level controls on reaction times and accuracy responses to high-frequency words and pseudowords. Using regression-based procedures, 8 phonological dyslexics and 16 sur...

Background: Many factors can effect on children's abilities and development. This study was conducted to investigate the effect of some risk factors as maternal health on child development using path analysis. Materials and Methods: This cross-sectional study was conducted on a total number of...

background: it is now well-demonstrated that histone demethylases play an important role in developmental controls, cell-fate decisions, and a variety of diseases such as cancer. lysine-specific demethylase 5d (kdm5d) is a male-specific histone demethylase that specifically demethylates di- and tri-methyl h3k4 at the start site of active genes. in this light, the aim of this study was to invest...