Dataset Information

The N400 and the fourth grade shift.

ABSTRACT: While behavioral and educational data characterize a fourth grade shift in reading development, neuroscience evidence is relatively lacking. We used the N400 component of the event-related potential waveform to investigate the development of single word processing across the upper elementary years, in comparison to adult readers. We presented third graders, fourth graders, fifth graders, and college students with a well-controlled list of real words, pseudowords, letter strings, false font strings, and animal name targets. Words and pseudowords elicited similar N400s across groups. False font strings elicited N400s similar to words and letter strings in the three groups of children, but not in college students. The pattern of findings suggests relatively adult-like semantic and phonological processing by third grade, but a long developmental time course, beyond fifth grade, for orthographic processing in this context. Thus, the amplitude of the N400 elicited by various word-like stimuli does not reflect some sort of shift or discontinuity in word processing around the fourth grade. However, the results do suggest different developmental time courses for the processes that contribute to automatic single word reading and the integrative N400.

SUBMITTER: Coch D

PROVIDER: S-EPMC4297273 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

The N400 and the fourth grade shift.

Coch Donna D

Developmental science 20140716 2

While behavioral and educational data characterize a fourth grade shift in reading development, neuroscience evidence is relatively lacking. We used the N400 component of the event-related potential waveform to investigate the development of single word processing across the upper elementary years, in comparison to adult readers. We presented third graders, fourth graders, fifth graders, and college students with a well-controlled list of real words, pseudowords, letter strings, false font strin ...[more]

PMID: 25041502

Similar Datasets

Project description:BackgroundBoth cognitive function and cardiorespiratory fitness are significant correlates of physical and mental health. The exploration of innovative school-based PA intervention strategies to improve cognitive function and cardiorespiratory fitness is of great interest for researchers and school educators. This study aimed at examining the effectiveness of the coordinated-bilateral ball skills (CBBS) intervention in improving cognitive function and cardiorespiratory fitness among 4th-grade students.MethodsThis study used a two-arm, quasi-experimental research design. The students (n = 347) in the intervention group received 16-weeks of CBBS intervention lessons in basketball and soccer. The students (n = 348) in the comparison group received 16-weeks of regular basketball and soccer lessons. All participants were pre- and post-tested with the d2 Test of Attention and the Progressive Aerobic Cardiovascular Endurance Run (PACER) test before and after the 16-week CBBS intervention. The data were analyzed by means of descriptive statistics and linear mixed models.ResultsThe linear mixed models yielded a marginal significant interaction effect of time with the group in their concentration (F(1, 680.130) = 3.272, p = 0.071) and a significant interaction effect of time with the group in their attention span (F(1, 785.108) = 4.836, p = 0.028) while controlling for age and the baseline concentration score. The linear mixed model also revealed a significant main effect of time in focused attention (F(1670.605) = 550.096, p = 0.000), attention accuracy (F(1, 663.124) = 61.542, p = 0.000), and cardiorespiratory fitness (F(1, 680.336) = 28.145, p = 0.000), but no significant interaction effect.ConclusionsThe CBBS group demonstrated a significant improvement in concentration performance and attention span over time, compared to the comparison group. Both groups improved their focused attention and attention accuracy as well as cardiorespiratory fitness over time. This study suggests that teaching ball skills in team sports for extended periods is instrumental to developing cognitive functions and cardiorespiratory fitness, though the CBBS lessons resulted in greater improvement in concentration performance and attention span.

Project description:Sustained night shift work is associated with various adverse health risks, including an increased risk of cardiovascular disease, type II diabetes, and susceptibility to infectious respiratory diseases. The extent of these adverse health effects, however, seems to greatly vary between night shift workers, yet the underlying reasons and the mechanisms underlying these interindividual differences remain poorly understood. Metabolomics assays in the blood have recently gained much attention as a minimally invasive biomarker platform capturing information predictive of metabolic and cardiovascular diseases. In this cross-sectional study, we explored and compared the metabolic profiles of 1010 night shift workers and 1010 age- and sex-matched day workers (non-shift workers) from the Lifelines Cohort Study. The metabolic profiles were determined using the 1H-NMR Nightingale platform for the quantification of 250 parameters of metabolism, including routine lipids, extensive lipoprotein subclasses, fatty acid composition, and various low-molecular metabolites, including amino acids, ketone bodies, and gluconeogenesis-related metabolites. Night shift workers had an increased BMI (26.6 vs. 25.9 kg/m2) compared with day workers (non-shift workers) in both sexes, were slightly more likely to be ever smokers (only in males) (54% vs. 46%), worked on average 5.9 ± 3.7 night shifts per month, and had been working in night shifts for 18.3 ± 10.5 years on average. We observed changes in several metabolic markers in male night shift workers compared with non-shift workers, but no changes were observed in women. In men, we observed higher levels of glycoprotein acetyls (GlycA), triglycerides, and fatty acids compared with non-shift workers. The changes were seen in the ratio of triglycerides and cholesterol(esters) to total lipids in different sizes of VLDL particles. Glycoprotein acetyls (GlycAs) are of particular interest as markers since they are known as biomarkers for low-grade chronic inflammation. When the analyses were adjusted for BMI, no significant associations were observed. Further studies are needed to better understand the relationship between night shift work and metabolic profiles, particularly with respect to the role of sex and BMI in this relationship.

Dataset Information

The N400 and the fourth grade shift.

Publications

The N400 and the fourth grade shift.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets