Adolescent Health Study Methodology
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Questions and Answers

Which group was found to have a sedentary lifestyle more commonly?

  • Students in lower grades
  • Boys
  • Ethnic minorities (correct)
  • Females (correct)

TV viewing and obesity were found to be correlated among black students.

False (B)

What were the three main selection phases of the sample design in the study?

Selecting primary sample units, selecting schools, and random selection of subject classes.

The study found an inverse correlation between TV viewing and ________ consumption.

<p>fruit and vegetable</p> Signup and view all the answers

Match the following groups with their correlation to TV viewing and obesity:

<p>White females = Positive correlation Hispanic females = Positive correlation Black students = Inverse correlation Ethnic minorities = Not specified</p> Signup and view all the answers

What methodology was used to collect data from the students?

<p>In-class survey by trained data collectors (B)</p> Signup and view all the answers

Parental consent was required for students to participate in the study.

<p>True (A)</p> Signup and view all the answers

Which demographic showed an inverse correlation between TV viewing and sedentary lifestyle?

<p>Black students</p> Signup and view all the answers

Flashcards

Cluster sampling

A sampling technique where clusters of individuals are chosen randomly, and then a random sample is taken from each cluster. This allows for representation of smaller groups within larger populations.

Demand characteristics

The tendency of participants in a study to behave in ways they think are expected, rather than how they normally would. This can be influenced by the researcher's presence or the way the study is structured.

Inverse correlation

The relationship between two variables where as one increases, the other decreases. For example, more TV watching might lead to less fruit and vegetable consumption.

Sedentary lifestyle

A lifestyle marked by lack of physical activity, often related to spending prolonged time in sedentary activities like watching TV or using electronic devices.

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Representativeness

A measure of whether a study's sample accurately reflects the characteristics of the larger population it aims to represent. This ensures the findings are generalizable.

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Method triangulation

A research method employing various techniques to gather data, providing a more comprehensive and reliable understanding of the phenomenon under investigation. This can involve qualitative and quantitative approaches.

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Risk factors

The likelihood of a person developing a particular health condition, often influenced by factors like genetics, lifestyle, or environment.

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Health behavior

The set of choices or decisions individuals make regarding their health, including diet, physical activity, and healthcare utilization. These can influence health outcomes.

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Study Notes

Study Methodology

  • Objective: Investigate the relationship between television viewing, physical activity, fruit/vegetable consumption, and obesity among adolescents.
  • Sample: 9-12 graders from public and private schools. Sample was representative of both racial groups (Black, Hispanic), A three-cluster sampling design was used for selection which ensured the validity of the sample
    • First, primary sample units (50) in large counties were chosen.
    • Second, schools (150) within the PSUs were selected
    • Third, random selections of 1-2 subject classes per grade level were chosen for participation
  • Data Collection:
    • YRBS questionnaires administered in class by trained personnel.
    • Parental consent obtained.
    • Variables collected included: TV viewing (quantified by hours of viewing), physical activity (quantified by frequency of sweating/non-sweating activities), and fruit/vegetable consumption (quantified by the frequency of consumption over a week.)
    • Measurements were made through self-reported data.
    • Weight and height were also recorded. (participants had to remove their shoes.)
  • Method Triangulation: Used multiple methods to collect data to increase validity and reliability.
  • Demand characteristics: A note that using self-reported measures could have introduced biases into findings.

Study Findings

  • Sedentary Lifestyle: More common for higher-grade students, females, and ethnic minorities.
  • TV Viewing and Obesity: Only found to be linked in white females and males, and Hispanic females.
  • TV Viewing and Sedentary Lifestyle: Linked in white and Hispanic adolescents, but inversely related to black students
  • TV Viewing and Fruit/Vegetable Consumption: Inverse correlation observed (more TV viewing linked to less fruit/vegetable consumption).

Discussion (implications)

  • Limited Access to Interventions: Adolescents often lack access to preventive health interventions about obesity and risk factors.
  • Risk Factors: Exposure to less-healthy foods and insufficient physical activity are identified as significant risk factors.

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Description

This quiz explores the study methodology investigating how television viewing, physical activity, and fruit/vegetable consumption relate to obesity among adolescents. It focuses on the sampling design used with 9-12 graders, emphasizing the data collection methods involved.

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