Cultural variation in cognitive flexibility reveals diversity in the development of executive functions

Cognitive flexibility, the adaptation of representations and responses to new task demands, improves dramatically in early childhood. It is unclear, however, whether flexibility is a coherent, unitary cognitive trait, or is an emergent dimension of task-specific performance that varies across populations with divergent experiences. Three-to 5-year-old English-speaking U.S. children and Tswana-speaking South African children completed two distinct language-processing cognitive flexibility tests: the FIM-Animates, a word-learning test, and the 3DCCS, a rule-switching test. U.S. and South African children did not differ in word-learning flexibility but showed similar age-related increases. In contrast, U.S. preschoolers showed an age-related increase in rule-switching flexibility but South African children did not. Verbal recall explained additional variance in both tests but did not modulate the interaction between population sample (i.e., country) and task. We hypothesize that rule-switching flexibility might be more dependent upon particular kinds of cultural experiences, whereas word-learning flexibility is less cross-culturally variable

The unity and diversity of executive functions: A systematic review and re-analysis of latent variable studies.

Confirmatory factor analysis (CFA) has been frequently applied to executive function measurement since first used to identify a three-factor model of inhibition, updating, and shifting; however, subsequent CFAs have supported inconsistent models across the life span, ranging from unidimensional to nested-factor models (i.e., bifactor without inhibition). This systematic review summarized CFAs on performance-based tests of executive functions and reanalyzed summary data to identify best-fitting models. Eligible CFAs involved 46 samples (N = 9,756). The most frequently accepted models varied by age (i.e., preschool = one/two-factor; school-age = three-factor; adolescent/adult = three/nested-factor; older adult = two/three-factor), and most often included updating/working memory, inhibition, and shifting factors. A bootstrap reanalysis simulated 5,000 samples from 21 correlation matrices (11 child/adolescent; 10 adult) from studies including the three most common factors, fitting seven competing models. Model results were summarized as the mean percent accepted (i.e., average rate at which models converged and met fit thresholds: CFI ≥ .90/RMSEA ≤ .08) and mean percent selected (i.e., average rate at which a model showed superior fit to other models: ΔCFI ≥ .005/.010/ΔRMSEA ≤ -.010/-.015). No model consistently converged and met fit criteria in all samples. Among adult samples, the nested-factor was accepted (41-42%) and selected (8-30%) most often. Among child/adolescent samples, the unidimensional model was accepted (32-36%) and selected (21-53%) most often, with some support for two-factor models without a differentiated shifting factor. Results show some evidence for greater unidimensionality of executive function among child/adolescent samples and both unity and diversity among adult samples. However, low rates of model acceptance/selection suggest possible bias toward the publication of well-fitting but potentially nonreplicable models with underpowered samples. (PsycINFO Database Record (c) 2018 APA, all rights reserved)

Less-structured time in children's daily lives predicts self-directed executive functioning.

Executive functions (EFs) in childhood predict important life outcomes. Thus, there is great interest in attempts to improve EFs early in life. Many interventions are led by trained adults, including structured training activities in the lab, and less-structured activities implemented in schools. Such programs have yielded gains in children's externally-driven executive functioning, where they are instructed on what goal-directed actions to carry out and when. However, it is less clear how children's experiences relate to their development of self-directed executive functioning, where they must determine on their own what goal-directed actions to carry out and when. We hypothesized that time spent in less-structured activities would give children opportunities to practice self-directed executive functioning, and lead to benefits. To investigate this possibility, we collected information from parents about their 6-7 year-old children's daily, annual, and typical schedules. We categorized children's activities as "structured" or "less-structured" based on categorization schemes from prior studies on child leisure time use. We assessed children's self-directed executive functioning using a well-established verbal fluency task, in which children generate members of a category and can decide on their own when to switch from one subcategory to another. The more time that children spent in less-structured activities, the better their self-directed executive functioning. The opposite was true of structured activities, which predicted poorer self-directed executive functioning. These relationships were robust (holding across increasingly strict classifications of structured and less-structured time) and specific (time use did not predict externally-driven executive functioning). We discuss implications, caveats, and ways in which potential interpretations can be distinguished in future work, to advance an understanding of this fundamental aspect of growing up

Learning from the children : exploring preschool children's encounters with ICT at home

This paper is an account of our attempts to understand preschool children's experiences with information and communication technologies (ICT) at home. Using case study data, we focus on what we can learn from talking directly to the children that might otherwise have been overlooked and on describing and evaluating the methods we adopted to ensure that we maximised the children's contributions to the research. By paying attention to the children's perspectives we have learned that they are discriminating users of ICT who evaluate their own performances, know what gives them pleasure and who differentiate between operational competence and the substantive activities made possible by ICT

The Priming Effects of Video Viewing on Preschoolers\u27 Play Behavior

This thesis investigates the relationship between educational television content and children‘s play behaviors immediately after viewing. Children ages 41-43 months of age were randomly assigned to view a television program with predominantly object-constructive or social dramatic content. All children participated in a period of video viewing, approximately 25 minutes in length, followed by a 30-minute play session. Each participant was subsequently administered a brief card sorting task to assess categorical knowledge of constructive and social activities. Each child‘s session was coded for looking at the television, toy choice, and play content (constructive or social-narrative). Video viewing condition and the interaction between categorical knowledge and condition significantly predicted children‘s subsequent play content. Taken as a whole, these findings imply that short-term priming effects of educational video viewing on children‘s play are present in 42-month old children but that these effects are moderated by children‘s categorical understanding of TV content

Introducing Nutrition Education to Preschoolers

This paper is about the importance of including nutrition education in preschool curriculum. It includes my process of creating and implementing a 3-day nutrition curriculum and how it impacted the children that took place in the program. This paper also goes over important influences on the development of children\u27s eating habits

Investigating the Role of Executive Processes in Young Children's Prospective Memory

Prospective memory (PM) is the ability to remember to carry out one's intentions. This is a critical ability for children to develop in order to function independently in their daily activities. This dissertation examines the role of executive functioning in preschoolers' PM in two studies that vary the executive demand at different stages of the PM task. Study 1 investigated the role of task difficulty during the retention interval prior to the PM task. A difficult working memory task during the delay period resulted in worse PM performance in 4- and 5-year-olds compared to an easy working memory task. In addition, children's working memory, planning ability, and theory of mind correlated with PM but only in the difficult filler task condition. Study 2 examined age differences between 4- and 5-year-olds in PM task performance when the task: (1) was embedded in an easy or difficult ongoing task, (2) had an instruction to focus on the intention versus an instruction to focus on the distractor activity during the retention interval, and (3) varied in the salience of prospective targets. Overall, 5-year-olds performed better on the PM task than 4-year-olds. Children also had superior PM when targets were salient compared to non-salient and marginally superior PM when they received an instruction to monitor their intention compared to when they received an instruction to focus on the distractor activity. In addition, positive relations between executive functioning and PM were documented. Taken together, these studies suggest that disrupting or encouraging monitoring has a direct impact on PM performance in certain conditions. The implications of these results for theories that suggest differing roles for controlled processes in PM are discussed

Pennies from Heaven? Using Exogeneous Tax Variation to Identify Effects of School Resources on Pupil Achievements

Despite important policy implications associated with the allocation of education resources, evidence on the effectiveness of school inputs remains inconclusive. In part, this is due to endogenous allocation; families sort themselves non-randomly into school districts and school districts allocate money based in order to compensate (or reinforce) differences in child abilities, which leaves estimates of school input effects likely to be biased. Using variation in education expenditures induced by the location of natural resources in Norway we examine the effect of school resources on pupil outcomes. We find that higher school expenditures, triggered by higher revenues from local taxes on hydropower plants, have a significantly positive effect on pupil performance at age 16. The positive IV estimates contrast with the standard cross-sectional estimates that reveal no effects of extra resources.pupil achievement, school resources

Using multimodal analysis to unravel a silent child’s learning

Although the English Foundation Stage Curriculum for children aged 3 to 5 years recognises that children learn through talk and play and through ‘movement and all their senses’ (DfEE & QCA, 2000: 20), there is comparatively little theoretical understanding of how children learn through diverse ‘modes’, such as body movement, facial expression, gaze, the manipulation of objects and talk, and there is little practical guidance on how practitioners can support children’s ‘multimodal’ learning. Indeed, mounting research evidence indicates that since the introduction of a national early years curriculum and early years assessment schemes, practitioners have felt under increased pressure to focus on children’s verbal skills in order to provide evidence of children’s literacy and numeracy skills in preparation for primary education (see Flewitt, 2005a & 2005b). In the context of these changes, this article relates the story of Tallulah, a 3-year-old girl with a late July birthday, who, like many summer-born children in England, spent one year in an early years setting before moving to primary school aged just 4 years. The article draws on data collected as part of an ESRC-funded study that explored the different ‘modes’ young children use to make and express meaning in the different social settings of home and a preschool playgroup (Flewitt, 2003). Examples are given of how Tallulah communicated her understandings at home through skilful combinations of talk, gaze direction, body movement and facial expression, and how others in the home supported Tallulah’s learning. These are then compared with examples of how Tallulah communicated in playgroup, primarily by combining the silent modes of gaze, body movement and facial expression. The article identifies how the different social settings of home and preschool impacted upon her choices and uses of different expressive modes