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Originally published in Issues in Science and Technology Librarianship, Spring 2002Teaching/Communication/Extension/Profession,

Objectively measured physical activity and sedentary behaviour in young children

Study 1: Aims: Compare the uniaxial MTI/CSA accelerometer and the biaxial Actiwatch accelerometer against direct observation of total physical activity and minute-by-minute physical activity in 3-4 year olds. Methods: MTI/CSA-7164 and Actiwatch accelerometers simultaneously measured activity during 35-45 minute sessions of structured play in 78, 3-4 year olds. Rank order correlations between accelerometry and direct observation were used to assess the ability of the accelerometers to assess total activity. Within-child minute-by-minute correlations were calculated between accelerometry output and direct observation. Results: For assessment of total activity MTI/CSA output was significantly positively correlated with direct observation (r 0.72, p0.05). Conclusion: The present study suggests that for epidemiological assessment of total physical activity in young children the MTI/CSA-7164 provides greater accuracy than the Actiwatch. Study 2: Aim: To cross-validate the 1100 counts/ minute cut-off for the assessment of sedentary behaviour in an independent sample of young children using the MTI/CSA accelerometer. Methods: A previously developed cut-off for MTI-CSA accelerometry output (validation study) in 30 healthy Scottish 3-4 year olds, was cross-validated against direct observation in an independent sample of (n = 52) healthy Scottish 3-4 year olds. Results: In the cross-validation study sensitivity was 83%: 438/528 inactive minutes were correctly classified. Specificity was 82%: 1251/1526 non-inactive minutes were correctly classified using this cut-off. Conclusion: Sedentary behaviour can be quantified objectively in young children using accelerometry

Skills, Capabilities and Inequalities at School Entry in a Disadvantaged Community

Socioeconomic inequalities in children’s skills and capabilities begin early in life and can have detrimental effects on future success in school. The present study examines the relationships between school readiness and sociodemographic inequalities using teacher reports of the Short Early Development Instrument in a disadvantaged urban area of Ireland. It specifically examines socioeconomic (SES) differences in skills within a low SES community in order to investigate the role of relative disadvantage on children’s development. Differences across multiple domains of school readiness are examined using Monte-Carlo permutation tests. The results show that child, family and environmental factors have an impact on children’s school readiness, with attendance in centre-based childcare having the most consistent relationship with readiness for school. In addition, the findings suggest that social class inequalities in children’s skills still exist within a disadvantaged community. These results are discussed in relation to future intervention programmes.School readiness, Socioeconomic inequalities, Monte-Carlo permutation tests

Perceptual bias, more than age, impacts on eye movements during face processing

Consistent with the right hemispheric dominance for face processing, a left perceptual bias (LPB) is typically demonstrated by younger adults viewing faces and a left eye movement bias has also been revealed. Hemispheric asymmetry is predicted to reduce with age and older adults have demonstrated a weaker LPB, particularly when viewing time is restricted. What is currently unclear is whether age also weakens the left eye movement bias. Additionally, a right perceptual bias (RPB) for facial judgments has less frequently been demonstrated, but whether this is accompanied by a right eye movement bias has not been investigated. To address these issues older and younger adults’ eye movements and gender judgments of chimeric faces were recorded in two time conditions. Age did not significantly weaken the LPB or eye movement bias; both groups looked initially to the left side of the face and made more fixations when the gender judgment was based on the left side. A positive association was found between LPB and initial saccades in the freeview condition and with all eye movements (initial saccades, number and duration of fixations) when time was restricted. The accompanying eye movement bias revealed by LPB participants contrasted with RPB participants who demonstrated no eye movement bias in either time condition. Consequently, increased age is not clearly associated with weakened perceptual and eye movement biases. Instead an eye movement bias accompanies an LPB (particularly under restricted viewing time conditions) but not an RPB

A farm transmission model for Salmonella in pigs, applicable to EU members states

The burden of Salmonella entering pig slaughterhouses across the European Union (EU) is considered a primary food safety concern. In order to assist EU Member States with the development of National Control Plans, we have developed a farm transmission model applicable to all Member States. It is an individual-based stochastic Susceptible-Infected model, that takes into account four different sources of infection of pigs (sows, feed, external contaminants such as rodents and new stock) and various management practices linked to Salmonella transmission/protection (housing, flooring, feed, All-In-All-Out production). A novel development within the model is the assessment of dynamic shedding rates. The results of the model, parameterized for two case study Member States (one high and one low prevalence) suggest that breeding herd prevalence is a strong indicator of slaughter pig prevalence. Until a Member States’ breeding herd prevalence is brought below 10% then the sow will be the dominant source of infection to pigs raised for meat production; below this level of breeding herd prevalence, feed becomes the dominant force of infection

Promoting Health and Nutrition Through Sport: Attitudes of the Junior Sporting Community

Introduction: This study aimed to provide information on parents’, children’s and sporting officials’ attitudes to sponsorship arrangements, and their support of potential policy interventions to reorient sponsorship to be more health promoting. Methods: Sports clubs (n=20) known to have food and beverage sponsors in Sydney, Illawarra and Canberra/Queanbeyan were selected. Parents and children at sports clubs were recruited through convenience sampling by approaching those attending the sports club at the time of the survey and those children who had a signed consent form. Sports clubs were visited between May and November 2010. At each club, one sports club official, ten parents of players aged 5 to 14 years, and five children aged 10 to 14 years were surveyed. Results: The majority of sporting officials and parents were supportive of policies to restrict unhealthy food and beverage sponsorship of elite sport and children’s sports clubs. More than two-thirds of all children were able to correctly recall sponsors of their sports club and almost half could correctly name at least one sponsor of their favourite elite sports team. Most children thought that food and beverage companies sponsored sport to help out sports clubs and liked to return the favour to these sponsors by buying their products. Conclusion: Children’s high level of recall of food and beverage sponsors is concerning as this recall is likely to be linked to children’s product preferences and consumption behaviours. Alternative funding mechanisms are required to replace community and elite sport sponsorship from unhealthy food and beverage companies to reduce the promotional effects of this marketing on children’s food choices and eating behaviours

Building Solutions to Protect Children from Unhealthy Food and Drink Sport Sponsorship.

In Australia, and indeed across the world, the proportion of children who are overweight or obese is increasing. Almost one-quarter of school-aged children are now overweight or obese. While the causes of obesity are complex and many, children’s exposure to high levels of unhealthy food marketing is one factor that affects the food and drinks that children like, ask for, buy and consume. Extensive research evidence has found that, in general, children are exposed to high levels of food marketing, most of which is for unhealthy or high fat, sugar and/or salt food and drinks. The most commonly advertised foods have been found to be sugar-sweetened breakfast cereals, savoury snacks, fast food restaurants, onfectionery and soft drinks

Promoting Health and Nutrition Through Sport: Attitudes of the Junior Sporting Community

Introduction: This study aimed to provide information on parents’, children’s and sporting officials’ attitudes to sponsorship arrangements, and their support of potential policy interventions to reorient sponsorship to be more health promoting. Methods: Sports clubs (n=20) known to have food and beverage sponsors in Sydney, Illawarra and Canberra/Queanbeyan were selected. Parents and children at sports clubs were recruited through convenience sampling by approaching those attending the sports club at the time of the survey and those children who had a signed consent form. Sports clubs were visited between May and November 2010. At each club, one sports club official, ten parents of players aged 5 to 14 years, and five children aged 10 to 14 years were surveyed. Results: The majority of sporting officials and parents were supportive of policies to restrict unhealthy food and beverage sponsorship of elite sport and children’s sports clubs. More than two-thirds of all children were able to correctly recall sponsors of their sports club and almost half could correctly name at least one sponsor of their favourite elite sports team. Most children thought that food and beverage companies sponsored sport to help out sports clubs and liked to return the favour to these sponsors by buying their products. Conclusion: Children’s high level of recall of food and beverage sponsors is concerning as this recall is likely to be linked to children’s product preferences and consumption behaviours. Alternative funding mechanisms are required to replace community and elite sport sponsorship from unhealthy food and beverage companies to reduce the promotional effects of this marketing on children’s food choices and eating behaviours

The normative power of food promotions: Australian children\u27s attachments to unhealthy food brands

The formation of food brand associations and attachment is fundamental to brand preferences, which influence purchases and consumption. Food promotions operate through a cascade of links, from brand recognition, to affect, and on to consumption. Frequent exposures to product promotions may establish social norms for products, reinforcing brand affect. These pathways signify potential mechanisms for how children\u27s exposure to unhealthy food promotions can contribute to poor diets. The present study explored children\u27s brand associations and attachments for major food brands. A cross-sectional online survey was conducted. Fourteen study brands were used, with each child viewing a set of seven logos. The questionnaire assessed perceptions of food brands and perceptions of users of brands, using semantic differential scales, and perceived brand \u27personalities\u27, using Likert scales. New South Wales, Australia, October-November 2014. Children aged 10-16 years (n 417). Children demonstrated strong positive affect to certain brands, perceiving some unhealthy food brands to have positive attributes, desirable user traits and alignment to their own personality. Brand personality traits of \u27smart\u27 and \u27sporty\u27 were viewed as indicators of healthiness. Brands with these traits were ranked lower for popularity. Children\u27s brand associations and attachments indicate the potential normative social influences of promotions. While children are aware of brand healthiness as an attribute, this competes with other brand associations, highlighting the challenge of health/nutrition messaging to counter unhealthy food marketing. Restricting children\u27s exposure to unhealthy food marketing and the persuasive nature of marketing is an important part of efforts to improve children\u27s diet-related health

Correlations Between Household Occupancy and Malaria Vector Biting Risk in Rural Tanzanian Villages: Implications for High-resolution Spatial Targeting of Control Interventions.

Fine-scale targeting of interventions is increasingly important where epidemiological disease profiles depict high geographical stratifications. This study verified correlations between household biomass and mosquito house-entry using experimental hut studies, and then demonstrated how geographical foci of mosquito biting risk can be readily identified based on spatial distributions of household occupancies in villages. A controlled 4 × 4 Latin square experiment was conducted in rural Tanzania, in which no, one, three or six adult male volunteers slept under intact bed nets, in experimental huts. Mosquitoes entering the huts were caught using exit interception traps on eaves and windows. Separately, monthly mosquito collections were conducted in 96 randomly selected households in three villages using CDC light traps between March-2012 and November-2013. The number of people sleeping in the houses and other household and environmental characteristics were recorded. ArcGIS 10 (ESRI-USA) spatial analyst tool, Gi* Ord Statistic was used to analyse clustering of vector densities and household occupancy. The densities of all mosquito genera increased in huts with one, three or six volunteers, relative to huts with no volunteers, and direct linear correlations within tested ranges (P < 0.001). Significant geographical clustering of indoor densities of malaria vectors, Anopheles arabiensis and Anopheles funestus, but not Culex or Mansonia species occurred in locations where households with highest occupancy were also most clustered (Gi* P ≤ 0.05, and Gi* Z-score ≥1.96). This study demonstrates strong correlations between household occupancy and malaria vector densities in households, but also spatial correlations of these variables within and between villages in rural southeastern Tanzania. Fine-scale clustering of indoor densities of vectors within and between villages occurs in locations where houses with highest occupancy are also clustered. The study indicates potential for using household census data to preliminarily identify households with greatest Anopheles mosquito biting risk