4200 Lecture 4 Quantitative Research
Lecture 4 Part 1
Chapter 8- Quantitative Research
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
Learning Objectives
Define research design.
Identify the purpose of research design.
Define control and fidelity as it affects research design and the outcomes of a study.
Compare and contrast the elements that affect fidelity and control.
Begin to evaluate what degree of control should be exercised in a research study.
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
2
Learning Objectives
Define internal validity.
Identify the threats to internal validity.
Define external validity.
Identify the conditions that affect external validity. Identify the links between study design and evidence-based practice.
Evaluate research design using critiquing questions.
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
3
Research Design
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
4
Purpose of Research Design
Provides the plan or blueprint
Is the vehicle for systematically testing research questions and hypotheses
Provides the structure for maintaining the control in the study
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
5
Elements of Research Design
WHO: Research Participants
WHAT: Observations
WHEN: Measurement of Time
WHERE: Selection of Subjects
Role of Investigator
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
6
Control
Achieved with steps taken by the researcher to hold the conditions of the study uniform and avoid or decrease the effect of intervening, extraneous, or mediating variables on the dependent variable or outcome Avoids bias or threats to the internal validity of the study
Copyright © 2014, 2010,
Chapter 8- Quantitative Research
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
Learning Objectives
Define research design.
Identify the purpose of research design.
Define control and fidelity as it affects research design and the outcomes of a study.
Compare and contrast the elements that affect fidelity and control.
Begin to evaluate what degree of control should be exercised in a research study.
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
2
Learning Objectives
Define internal validity.
Identify the threats to internal validity.
Define external validity.
Identify the conditions that affect external validity. Identify the links between study design and evidence-based practice.
Evaluate research design using critiquing questions.
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
3
Research Design
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
4
Purpose of Research Design
Provides the plan or blueprint
Is the vehicle for systematically testing research questions and hypotheses
Provides the structure for maintaining the control in the study
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
5
Elements of Research Design
WHO: Research Participants
WHAT: Observations
WHEN: Measurement of Time
WHERE: Selection of Subjects
Role of Investigator
Copyright © 2014, 2010, 2006, 2002, 1998, 1994, 1990, 1986 by Mosby, an imprint of Elsevier Inc.
6
Control
Achieved with steps taken by the researcher to hold the conditions of the study uniform and avoid or decrease the effect of intervening, extraneous, or mediating variables on the dependent variable or outcome Avoids bias or threats to the internal validity of the study
Copyright © 2014, 2010,