نتایج جستجو برای: critical period
تعداد نتایج: 947778 فیلتر نتایج به سال:
یافته های ضد و نقیض محققان زبان دوم، الهام بخش نظریات متعدد و گاه متضادی در زمینه نقش دستور همگانی universal grammar)) در فراگیری زبان دوم بوده است . علاوه بر این بتازگی ادعاهای طرفداران نظریه دوره حساس زبان آموزی (critical period hypothesis) مبنی بر این که پس از سپری شدن دوره بلوغ ، دستور همگانی نمی تواند نقش موثری در فراگیری زبان دوم داشته باشد، مورد توجه چشمگیری قرار گرفته است. پژوهش...
The universal period-doubling scaling of a unimodal map with an asymmetric critical point is governed by a period-2 point of a renormalisation operator. The period-2 point is parametrised by the degree of the critical point and the asymmetry modulus. In this paper we study the asymptotics of period-2 points and their associated scaling parameters in the singular limit of degree tending to 1.
What is the critical period? Also known as the sensitive period, the critical period is a time during early postnatal life when the development and maturation of functional properties of the brain, its ‘plasticity’, is strongly dependent on experience or environmental influences. The concept of a critical period therefore plays an important role in the ageold nature versus nurture debate — to w...
Neuronal circuits are shaped by experience during critical periods of early postnatal life. The ability to control the timing, duration, and closure of these heightened levels of brain plasticity has recently become experimentally accessible, especially in the developing visual system. This review summarizes our current understanding of known critical periods across several systems and species....
abstract in order to determine the critical period of weed control in euro-flour variety of sunflower (helianthus annus, l.) an experimental was conducted with a randomized complete block design with 10 treatments and three replications in islamic azad university astara-branch-agricultural college in 2006 growing season. experimental treatments were conducted in two sets, the first set included...
Cortical circuits in the brain are refined by experience during critical periods early in postnatal life. Critical periods are regulated by the balance of excitatory and inhibitory (E/I) neurotransmission in the brain during development. There is now increasing evidence of E/I imbalance in autism, a complex genetic neurodevelopmental disorder diagnosed by abnormal socialization, impaired commun...
critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...
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