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Chapter 1

HSS 2381 Chapter Notes - Chapter 1: Research Question, Dependent And Independent Variables, Descriptive Statistics

Department
Health Sciences
Course Code
HSS 2381
Professor
Eleanor Riesen
Chapter
1

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Chapter 1: Introduction to Data Analysis in an Evidence-Based Practice Environment -
Data Analysis & Nursing Research:
Evidence-based practice (EBP): Use of best clinical evidence in making patient care decisions
Research & Evidence-Based Practice:
Research: is systematic inquiry that uses orderly, disciplined methods (including statistics) to answer
questions or solve problems
â€¢ The aim of nursing research is to generate evidence that can contribute to EBP for nurses
Typical Steps in EBP:
2. 2) Searching for research evidence that addresses the question
3. appraising the evidence
4. integrating the evidence with one's own clinical expertise & info about patient preferences
â€¢ Next step: locate appraisal
â€¢ Appraisal: all aspects of relevant study; how sample of participants were selected, how
confounding variables were controlled, hwo concepts were measured, how the research info
was gathered, how info was analyzed
The Analysis of Research Data:
1. Research problem identified (e.g., high stress in hospitalized children) ïƒ
2. Research question asked: Will a music intervention reduce stress? ïƒ
3. Concepts defined/measured ïƒ
4. Data collected ïƒ
5. Data analyzed through statistics
â€¢ Data: is the information gathered to address research questions
â€¢ In quantitative research, data are usually quantitative (numbers) & subject to statistical analysis
â€¢ Statistics: refers to collection of mathematical methods of organizing, summarizing, analyzing, &
interpreting information, drawing conclusion gathered in a study
Concepts & Variables:
Research Variables:
â€¢ Concept : An abstraction inferred from characteristics or behaviors
o Examples: pain, stress, body temperature
â€¢ In quantitative studies, concepts are called variables
â€¢ A variable is something that takes on different values; varies
o Height, sex, and respiratory rate vary from one person to the next
Independent & Dependent Variable:
â€¢ Independent variable: cause of or influence on the dependent variable
Research questions: are the queries researchers seek to answer through the collection +analysis of data
â€¢ Research questions communicate the research variables & the population (the entire group of
interest)
â€¢ Ex: In hospitalized children (population) does music (X/IV) reduce stress (Y/DV)?
Operationalizing Variables:
Variable Definition:
â€¢ In studies, variables need to be defined:
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