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Showing 1 to 20 of 24 for “"Sensitive Period"”.

  1. The sensitive period for second language acquisition: An experimental study of age effects on universal grammar and language transfer

    Shim, Rosa JinyoungUniversity of Illinois at Urbana-Champaign2011

    The main objectives of this study are to test the Sensitive Period Hypothesis for second language acquisition and to find out its nature. Speed (reaction time) of responses was measured in addition to grammaticality judgment so that the subjects' conscious monitoring of linguistic processes could …

    uiuc Repository record

  2. A sensitive period for second language acquismon: A reaction-time study of grammaticality juooments of English by Korean-English bilinguals

    Kim, RyonheeUniversity of Illinois at Urbana-Champaign1991

    … to the following questions related to the sensitive period hypothesis in second language acquisition: (1) Does a sensitive period exist in SLA? (2) If so, what characterizes the period? (3) Can the sensitive period be explained by age or by confounding affective factors? (4) What …

    uiuc Repository record

  3. The Sensitive Period for Second-Language Acquisition: A Reaction-Time Study of Maturational Effects on the Acquisition of L2 Lexico-Semantic and Syntactic Systems

    Kim, Eun JooUniversity of Illinois at Urbana-Champaign2015

    … the findings from both experiments suggest that sensitive periods for L2 acquisition are involved both in lexico-semantics and in syntax, and that the exact nature of the effects of the sensitive periods may be different, depending upon the linguistic component and the task under examination. …

    uiuc Repository record

  4. The Sensitive Period Hypothesis in L2 Production: /I/ Versus /I/ and Voicing-Dependent Vowel Duration in the English Speech Produced by Korean Speakers of English

    Kim, RyonheeUniversity of Illinois at Urbana-Champaign2014

    This study tested the sensitive period hypothesis in relation to L2 production. Thirty Korean speakers of English who came to the United States at varying ages participated in two experiments. When they came to the U.S., their ages ranged from 0 (at birth) to 26. Their mean length of stay in the …

    uiuc Repository record

  5. Changes in the Morphology of Hypoglossal Motor Neurons in the Brainstem of Developing Rats

    Williams, Paul Allen

    … during the first three weeks of life, with a sensitive period at 10 to 13 days post-birth (P10–P13) characterized by pronounced changes in neurotransmitters, receptors, excitation-inhibition balance, and breathing. However, age-dependent morphological changes of XII MNs during the first three …

    loma-linda Repository record

  6. The development and inhibition of physical aggression in early childhood : measurement and associations

    Trainor, WilliamUniversity of Saskatchewan2011

    … (2001) has discussed the possibility of a sensitive period (from approximately 24-36 months of age) for learning to restrain physical aggression. Two studies were conducted to assess the relative and cumulative associations between physically aggressive behaviour and both cognitive …

    sask Repository record

  7. Sensitive periods for second language acquisition: A reaction time study of the syntactic processing of English by Korean-English bilinguals

    Shim, Rosa Jin-youngUniversity of Illinois at Urbana-Champaign1990

    … Thus a hypothesis was proposed that there 1s a sensitive period for attaining native-like speed in language processing which ends before the age of three. Evidence was also round for the maturational effect that resulted in a decrease of language processing speed as the age of onset for the L2 …

    uiuc Repository record

  8. Age-Dependent Effects Of Chronic GABAA Receptor Blockade In Barrel Cortex

    Gargan, LynnUniversity of North Texas2001

    … were placed over barrel cortex for a 4-day period in young (postnatal days 8 - 12) and adult rats. In the cortex of young, but not adult rats, the chronic blockade of GABAA receptors resulted in substantial tissue loss and neuron loss. The greater loss of neurons in young rats supports the …

    unt Repository record

  9. The effect of timing of growing season drought on flowering of Andropogon gerardii

    Dietrich, John David, author, Smith, Melinda D., advisor, Knapp, Alan K., committee member, Ocheltree, Troy W., committee memberColorado State University. Libraries2015

    … of ecosystems. The particular precipitation period(s) of greatest importance varies between ecosystems. In tallgrass prairie of the central US, the relative importance of different precipitation periods is dictated by the phenology of the dominant C4 grasses, in particular Andropogon gerardii …

    colostate Repository record

  10. Understanding The Role Of Nutritional Stress In The Adult And Developing Zebra Finch

    Thompson, Jessica Bayley2014

    … particularly susceptible to stress during the sensitive period for song learning. Thus the developmental stress hypothesis (DSH) proposes that adult song reflects a male's early life environment during this period. Nutritional stress (NS) has been shown to cause deficits in song learning and …

    wayne-thes Repository record

  11. Developmental Monoamine Signaling Impacts Adult Affective and Aggressive Behaviors

    Yu, Qinghui2012

    … vulnerability is often restricted to sensitive periods. The concept of sensitive developmental periods for the indelible modulation of complex behaviors is similar to that described for sensory systems (e.g. visual cortex, ocular dominance plasticity), but effected behaviors, …

    columbia-diss Repository record

  12. Neuropsychological Outcome In Relation To Duration Of Early Orphanage Experience

    Avery, Jacquelyn Marie Perry2012

    … working memory. These results may demonstrate a sensitive period in language development for children with a history of institutional care that occurs around approximately two years of age.</p>

    wayne-thes Repository record

  13. Exploring socio-affective mental health risk factors in adolescence

    Griffiths, KirstyUniversity of Cambridge2022

    … with a particular focus on adolescence as a sensitive period for both social development and depression vulnerability. Chapter 2 investigates how sensitivity to affectively-laden social information can impact the cognitive systems needed for everyday functioning, with a focus on cognitive …

    cambridge Repository record

  14. A Systematic Review of Caregiver Interventions in Infancy to Enable Responsive Caregiving and Secure Attachment in Low and Middle-Income Countries

    Gilmour, Kirsty ADivision of Public Health2018

    The first 1000 days is recognised as the most sensitive period of development of an individual’s life. Infants in low and middle-income countries face significant risks to their development during this period. Research confirms that having a responsive, caring relationship between the infant and …

    cape-town Repository record

  15. Windows in the clock: An in vitro study of melatonin action and signal transduction in the suprachiasmatic circadian pacemaker

    McArthur, Angela JeanUniversity of Illinois at Urbana-Champaign2011

    … electrical activity by 2-4 hr during a broad period surrounding lights-off at circadian time (CT) 10-14, while a more narrow window of sensitivity was found just prior to lights-on. Further, melatonin utilizes a pertussis toxin (PTX)-sensitive G protein pathway to reset the SCN pacemaker. A …

    uiuc Repository record

  16. Acute Sleep Organization Following Unanesthetized Circumcision of Neonates

    Gray, Margeaux M.2019

    … and quality of sleep during this developmentally sensitive period. Neonates undergoing circumcision, a prevalent procedure in the U.S. (American Academy of Pediatrics Circumcision Policy Statement [AAP], 1999, 2005, 2012), also are at risk for operative stress or postoperative pain. Changes in the …

    wvu Repository record

  17. Song learning in the song sparrow (Melospiza melodia): ecological and social factors

    Nordby, Jennifer Cully1999

    … of acquiring new songs after their presumed sensitive period for song memorization (30--90 days of age) by exposing them to new tutors after their natal summer. Eight of 12 subjects learned songs from tutors they only heard after 140 days of age, and six subjects learned most of their songs …

    washington Repository record

  18. Potentiating effects of caffeine on the teratogenicity of acetazolamide in two strains of mice

    Urbano, Charissa M.1988

    … or a combination of both agents during the sensitive period of development. Untreated and vehicle-treated groups served as controls. Individual fetuses were examined for gross morphological abnormalities and skeletal variations.Findings1. A highly significant (P<.001) increase in fetal …

    ballstate-thes Repository record

  19. Cytokinin interconversion by StCKP1 controls potato tuber dormancy

    Bromley, Jennifer RachaelUniversity of Cambridge2009

    … 60% is intended for human consumption. Since the period of tuber dormancy before tuber buds sprout is usually shorter than the optimal market storage period, control of sprouting is essential. To prolong dormancy, tubers are either stored at low temperatures and/or are treated with chemical sprout …

    cambridge Repository record

  20. Sensitive Periods for the Effects of Childhood Maltreatment on Functional Connectivity in Cognitive Control and Risk Processing Systems

    Lindenmuth, MorganVirginia Tech2023

    … how abuse and neglect across three developmental periods (early childhood, school age, and adolescence) are associated with longitudinal changes in task-based functional connectivity during risk-processing and cognitive control. The current sample included 167 adolescents (13-14 years old at Time …

    vt Repository record

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