Martin Guhn

Does the EDI Measure School Readiness in the Same Way Across Different Groups of Children

The present study investigates whether the Early Development Instrument (Offord & Janus, 1999) measures school readiness similarly across different groups of children. We employ ordinal logistic regression to investigate differential item functioning, a method of examining measurement bias. For 40,000 children, our analysis compares groups according to gender, English-as-a-second-language (ESL) status, and Aboriginal status. Our results indicate no systematic measurement differences regarding Aboriginal status and gender, except for 1 item on which boys are more likely than girls to be rated as physically aggressive by Kindergarten teachers. In contrast, ESL children systematically receive lower ratings on items of the language and communication domains—as expected by definition of ESL status—but not within the physical, social, and emotional domains. We discuss how our results fit with child development research and the purpose of the Early Development Instrument, thus supporting its validity.

Hair cortisol reflects socio-economic factors and hair zinc in preschoolers

This study examined the relationship between childrens hair cortisol and socioeconomic status of the family, as measured by parental education and income. Low family socioeconomic status has traditionally been considered a long-term environmental stressor. Measurement of hair cortisol provides an integrated index of cumulative stress exposure across an extended period of time. The present study is the first to examine the relationship between hair cortisol and parental education as well as parental income in a representative sample of preschoolers. Data on hair cortisol, family income, and parental education were collected for a representative sample of 339 children (Mean age=4.6 years; SD=.5 years) from across 23 neighbourhoods of the city of Vancouver, Canada. As maternal education was shown previously to be associated with hair zinc level, hair zinc measurements were included as well in order to explore potential relationships between hair zinc and hair cortisol. The relationship between hair cortisol and parental education was examined using hierarchical regression, with hair zinc, gender, age, and single parenthood included as covariates. Maternal and paternal education both were correlated significantly with hair cortisol (r=-0.18; p=.001). The relationship remained statistically significant even after controlling for all demographic covariates as well as for hair zinc and after taking the neighbourhood-level clustering of the data into account. Parental income, on the other hand, was not related significantly to childrens hair cortisol. This study provides evidence that lower maternal and paternal education are associated with higher hair cortisol levels. As hair cortisol provides an integrated index of cortisol exposure over an extended time period, these findings suggest a possibly stable influence of SES on the function of the hypothalamic-pituitary-adrenal (HPA) axis. Cumulative exposure to cortisol during early childhood may be greater in children from low socio-economic backgrounds, possibly through increased exposure to environmental stressors.

The Early Development Instrument: Translating School Readiness Assessment Into Community Actions and Policy Planning

This invited special issue of Early Education and Development presents research related to the Early Development Instrument (EDI; Janus & Offord, 2007), a community tool to assess childrens school readiness at a population level. In this editorial introduction, we first sketch out recent trends in school readiness research that call for a contextual and whole-child assessment of school readiness. Then we provide an overview of the EDI, including a discussion of its purpose and development, as well as its large-scale international use as a community tool to monitor childrens developmental outcomes at population levels. Finally, we introduce the special issues articles, all of which present research findings from ongoing community research projects that employ the EDI to assess childrens school readiness. These articles are grouped into the following thematic themes: (a) individual-level validity of the EDI, (b) school and neighborhood effects and population-level validity of the EDI, and (c) program implementation and evaluation using the EDI.

The predictive relationship between achievement and participation in music and achievement in core Grade 12 academic subjects

The relationship between musical training and general intellectual capacity as well as academic achievement has been discussed in numerous contexts. In our study, we examined the relationship between participation and achievement in music and achievement in academic courses, based on data from three consecutive British Columbia student cohorts. Across the three cohorts, we consistently found that music participation was associated with generally higher academic achievement, and that Grade 11 music course scores predicted Grade 12 academic achievement scores in linear regression analyses. Our results support the notion that the time dedicated to music participation does not impede, but rather goes hand in hand with or even fosters academic excellence in other ‘core’ subjects.

Development and Validation of the Middle Years Development Instrument (MDI): Assessing Children’s Well-Being and Assets across Multiple Contexts

Few instruments provide reliable and valid data on child well-being and contextual assets during middle childhood, using children as informants. The authors developed a population-level, self-report measure of school-aged children’s well-being and assets—the Middle Years Development Instrument (MDI)—and examined its reliability and validity. The MDI was designed to assess child well-being inside and outside of school on five dimensions: (1) Social and emotional development, (2) Connectedness to peers and to adults at school, at home, and in the neighborhood, (3) School experiences, (4) Physical health and well-being, and (5) Constructive use of time after school. This paper describes the theoretical framework, selection of items and scales for the survey, and four studies that were conducted to revise the MDI and examine its psychometric properties. The findings indicate a theoretically predicted factor structure, high internal consistency, and document the convergent and discriminant validity of the MDI scales. The discussion delineates a plan for future validation studies that address further validity questions, such as predictive validity, measurement invariance, and fairness/bias, and provides a brief outlook of how the MDI may be used by practitioners, educators, and decision makers in schools and communities to motivate and inform action in support children’s well-being.

The Role of Supportive Adults in Promoting Positive Development in Middle Childhood A Population-Based Study

The goal of this research was to examine the role of supportive adults to emotional well-being in a population of Grade 4 students attending public schools in Vancouver, Canada. Reflecting the ecology of middle childhood, we examined the extent to which perceived family, school, and neighborhood support relate to young people’s self-reported emotional well-being (N = 3,026; 48% female; Mage = 9.75). Furthermore, we investigated the hierarchy of importance among those support factors in predicting students’ well-being. As expected, adult support in all three ecological contexts was positively related to emotional well-being. School support emerged as the most important adult support factor, followed by home and neighborhood support. All three support factors emerged as stronger predictors than socioeconomic status (SES) in our study. We discuss our findings in relation to the empirical field of relationship research in middle childhood, and how our findings can inform educational practice.

Measurement invariance of the Satisfaction with Life Scale: reviewing three decades of research

PurposeThe Satisfaction with Life Scale (SWLS) is a widely used measure of life satisfaction, a key aspect in quality of life. The SWLS has been used across many socio-demographic groups. Comparison of life satisfaction across different subgroups (e.g., cultures) is meaningful to researchers; such cross-group comparison presupposes that validity of the inferences from SWLS scores holds across various subgroups (measurement invariance: MI). The aim of the present review was to identify, summarize, and evaluate research testing measurement invariance of the SWLS.MethodsA targeted literature search identified articles (published 1985–2016) that examined MI of the SWLS using multi-group confirmatory factor analysis.ResultsThe search retrieved 27 articles, representing 66,380 respondents across 24 nations. Gender, age, and culture were the most common types of MI assessed. Most articles used translated (non-English) versions of the SWLS. The highest level of MI tested in each article (i.e., configural, metric, scalar, strict) varied. Findings generally supported a unidimensional structure (configural MI), but less commonly supported were equivalent factor loadings (metric MI). Over half of the gender invariance analyses supported scalar or strict MI, whereas scalar or strict MI was supported in only 1 of the 11 culture MI analyses and 1 of the 9 age MI analyses.ConclusionsFindings suggest meaningful comparisons of SWLS means across gender may be valid in some situations, but most likely not across culture or age groups. Participants mostly ascribe similar meaning to like items on the SWLS regardless of their gender, but age and especially culture seem to influence this process.

Reply to Li, D'Angiulli and Kendall: The Early Development Index and children from culturally and linguistically diverse backgrounds

To the Editors of Early Years: We are writing in response to the paper by Li, D’Angiulli and Kendall (2007), published recently in your journal. As researchers responsible for developing, validating, disseminating and improving the Early Development Instrument, we welcome all constructive feedback. However, we feel that there are two key aspects of this paper that we would like to address. The first concerns a number of errors and misconceptions in the paper that we think are important to clarify and correct. The second issue relates to the significant amount of research and effort that has taken place since this article was first written, particularly the increasing amount of effort, both in Canada and in Australia, to engage the Indigenous/Aboriginal populations.

The use of population‐level data to advance interdisciplinary methodology: a cell‐through‐society sampling framework for child development research

The authors argue that population‐level data should be used to advance interdisciplinary research about community effects on early development. These data permit the identification of neighborhoods in which development patterns deviate from predictions based on local socioeconomic status (SES). So‐called ‘off‐diagonal’ places signal where researchers are likely to discover processes that either deflect the risks of low SES or dampen the salutary impact of favorable SES. Since such neighborhoods will be best understood relative to nearby ‘on‐diagonal’ neighborhoods where macro‐economic and/or public policy factors are constant, the authors present a methodology for illuminating these regional clusters. The method is deployed in British Columbia, Canada, where a team has collected developmental observations from two censuses of kindergarten children (n = 82,632). The article discusses how these clusters can be used to coordinate sampling decisions among academics representing the range of disciplines needed to study child development from cell‐through‐society, as is recommended in the literature.

A review of neighborhood effects and early child development: How, where, and for whom, do neighborhoods matter?

Abstract This paper describes a scoping review of 42 studies of neighborhood effects on developmental health for children ages 0–6, published between 2009 and 2014. It focuses on three themes: (1) theoretical mechanisms that drive early childhood development, i.e. how neighborhoods matter for early childhood development; (2) dependence of such mechanisms on place‐based characteristics i.e. where neighborhood effects occur; (3) dependence of such mechanisms on child characteristics, i.e. for whom is development most affected. Given that ecological systems theories postulate diverse mechanisms via which neighborhood characteristics affect early child development, we specifically examine evidence on mediation and/or moderation effects. We conclude by discussing future challenges, and proposing recommendations for analyses that utilize ecological longitudinal population‐based databases. HighlightsSocioeconomic status was the most studied neighborhood determinant.15 studies examined mediation (how); 22 examined moderation (where and for whom).Neighborhood social‐interactive mechanisms were the most common mediator.Evidence on child‐ or neighborhood‐level moderation effects were not conclusive.A research agenda using longitudinal population‐based data linkages is proposed.