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Gene–environment interaction occurs when genetic factors and environmental factors interact to produce an outcome that cannot be explained by either factor alone. [6] For example, a study found that individuals carrying the genetic variant 5-HTT (the short copy) that encodes the serotonin transporter were at a higher risk of developing depression when exposed to adverse childhood experiences ...
Stress during early childhood may also affect the child's development and have negative consequences on neural systems underlying fluid intelligence. A 2006 study found that IQ scores were related to the number of traumas and symptoms of post traumatic stress disorder (PTSD) in children and adults. [37]
Environmental enrichment affects the complexity and length of the dendrite arbors (upon which synapses form). Higher-order dendrite branch complexity is increased in enriched environments, [13] [15] as can the length, in young animals, of distal branches. [16] Environmental enrichment rescues harmful effects of stress on dendritic complexity. [17]
The child may have a twin or a sibling close to their own age and may not be receiving the parent's full attention. Another possibility is that the child is in a daycare with too few adults to administer individual attention. General development can be impacted if the child does not receive an adequately nutritional diet. [145]
Also in 2016, Quizlet launched "Quizlet Live", a real-time online matching game where teams compete to answer all 12 questions correctly without an incorrect answer along the way. [15] In 2017, Quizlet created a premium offering called "Quizlet Go" (later renamed "Quizlet Plus"), with additional features available for paid subscribers.
At birth, the development of respiratory control neural circuits is incomplete, requiring complex interactions from both the environment and intrinsic factors. Experimentally exposing two-week-old kittens and rats to hyperoxic conditions completely eliminates the carotid chemoreceptor response to hypoxia , resulting in respiratory impairment.
Environmental toxicants and fetal development is the impact of different toxic substances from the environment on the development of the fetus. This article deals with potential adverse effects of environmental toxicants on the prenatal development of both the embryo or fetus, as well as pregnancy complications. The human embryo or fetus is ...
Piaget proposed that children's inability to conserve is due to weakness in the way children think during the preoperational stage (ages 2–6). This stage of cognitive development is characterized by children focusing on a single, salient dimension of height or length, while ignoring other important attributes of an object.[2]