자연주의적 탐구조사(Naturalistic Inquiry)

Qualitative content analysis is commonly used for analyzing qualitative data. However, few articles have examined the trustworthiness of its use in nursing science studies. The trustworthiness of q...

https://journals.sagepub.com/doi/pdf/10.1177/2158244014522633

Qualitative Content Analysis: A Focus on Trustworthiness

We investigate conditions sufficient for identification of average treatment effects using instrumental variables. First we show that the existence of valid instruments is not sufficient to identify any meaningful average treatment effect. We then establish that the combination of an instrument and a condition on the relation between the instrument and the participation status is sufficient for identification of a local average treatment effect for those who can be induced to change their participation status by changing the value of the instrument. Finally we derive the probability limit of the standard IV estimator under these conditions. It is seen to be a weighted average of local average treatment effects.

Evolution and Rationality Some Recent Game-Theoretic Results. Identification and Estimation of Local Average Treatment Effects

Doing Qualitative Research

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Applied Missing Data Analysis

http://theheal.ca/uploads/pdf/2007%20theeffectofseasonandweatheronphysicalactivity.pdf

The effect of season and weather on physical activity: A systematic review

http://funnelcakes.pbworks.com/f/5983903470907061970.pdf

The physical activity levels of preschool-aged children: A systematic review

Objectives. We examined whether certain characteristics of the social and physical environment influence a child's mode of travel between home and school.Methods. Students aged 11 to 13 years from 21 schools throughout London, Ontario, answered questions from a travel behavior survey. A geographic information system linked survey responses for 614 students who lived within 1 mile of school to data on social and physical characteristics of environments around the home and school. Logistic regression analysis was used to test the influence of environmental factors on mode of travel (motorized vs “active”) to and from school.Results. Over 62% of students walked or biked to school, and 72% from school to home. The likelihood of walking or biking to school was positively associated with shorter trips, male gender, higher land use mix, and presence of street trees. Active travel from school to home was also associated with lower residential densities and lower neighborhood incomes.Conclusions. Our findings demo...

/pdf/the-influence-of-the-physical-environment-and-42wgf19qnp.pdf

The Influence of the Physical Environment and Sociodemographic Characteristics on Children's Mode of Travel to and From School

Environmental influences on physical activity levels in youth.

This study examined the relationship between the neighborhood food environment and the food purchasing behaviors among adolescents. Grade 7 and 8 students (n = 810) at 21 elementary schools in London, Ontario, Canada completed a questionnaire assessing their food purchasing behaviors. Parents of participants also completed a brief questionnaire providing residential address and demographic information. A Geographic Information System (GIS) was used to assess students’ home and school neighborhood food environment and land use characteristics. Logistic regression analysis was conducted to assess the influence of the home neighborhood food environment on students’ food purchasing behaviors, while two-level Hierarchical Non-Linear Regression Models were used to examine the effects of school neighborhood food environment factors on students’ food purchasing behaviors. The study showed that approximately 65% of participants reported self-purchasing foods from fast-food outlets or convenience stores. Close proximity (i.e., less than 1 km) to the nearest fast-food outlet or convenience store in the home neighborhood increased the likelihood of food purchasing from these food establishments at least once per week by adolescents (p < 0.05). High fast-food outlet density in both home and school neighborhoods was associated with increased fast-food purchasing by adolescents (i.e., at least once per week; p < 0.05). In conclusion, macro-level regulations and policies are required to amend the health-detracting neighborhood food environment surrounding children and youth’s home and school.

/pdf/the-influence-of-local-food-environments-on-adolescents-food-4335nqsoq2.pdf

Patricia Tucker

Papers

The effect of season and weather on physical activity: A systematic review

The physical activity levels of preschool-aged children: A systematic review

The Influence of the Physical Environment and Sociodemographic Characteristics on Children's Mode of Travel to and From School

Environmental influences on physical activity levels in youth.

The Influence of Local Food Environments on Adolescents’ Food Purchasing Behaviors