Research Methods & Design Outline. Types of research design How to choose a research design Issues in research design
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1 Research Methods & Design Outline Types of research design How to choose a research design Issues in research design
2 Types of Research Design Correlational Field (survey) Experimental Qualitative Meta-analysis
3 Types of Research Design Correlational Study Explores or tests relations between variables Rules out alternative variables that could play a role in relations between variables Field Studies participants in their natural setting Maximizes realism
4 Types of Research Design Experimental Designs Directly establishes causeeffect nature of relationship between variables Decreases ambiguity Laboratory vs. Field Experiment Artificial setting with high control over variables
5 Types of Research Design Experimental Designs Establish cause via Manipulation of cause (aka treatment) Temporal precedence of cause (and no other factor) before effect Control of all other extraneous factors
6 Experimental Research Design Example
7 Types of Research Design Qualitative Non-quantitative Examples Interview/focus group transcripts Some kinds of observational/archival data Critical incidents methodology Helps in Formulating hypotheses Deeper/richer understanding of phenomena Interpret organization-specific results
8 Types of Research Design Meta Analysis Statistically combines results of existing research to estimate overall size of relation between variables Helps in Developing theory Identifying research needs, Establishing validity/effectiveness of HR tools Can replace large-scale research studies Better than literature reviews
9 Types of Research Design Types of research design How to choose a research design Issues in research design
10 How to Choose a Research Design Does it adequately test the hypothesis? Does it identify & control extraneous factors? Are results generalizable? Can the hypothesis be rejected or retained via statistical means? Is the design efficient in using available resources?
11 How to Choose a Research Design Does it adequately test the hypotheses? Hypotheses determine participants, variables measured & data analysis methods Example hypotheses tested in student projects Discussion of Requirements of proposal
12 How to Choose a Research Design Does it identify and control extraneous factors? Eliminate alternative explanations for results to increase confidence in causeeffect conclusion (internal validity) Control depends on type of design Correlational design has less control Extraneous variables are measured and effects are statistically controlled
13 Controlling Extraneous Variables in Experimental Designs Random Assignment Distributing extraneous variable across groups randomly Matching Groups Spreading the extraneous variable across groups via systematic assignment Less effective than random assignment Control Group Group that receives no manipulation
14 How to Choose a Research Design Are results generalizable? Replicate to other samples and other contexts Random selection of participants Features of field experiments enhancing external validity Realistic nature of setting and/or task Manipulation of treatment Use of control group Nature of samples used Lack of control over confounding variables due to nonrandom assignment or inability for matching
15 How to Choose a Research Design Can the hypothesis be rejected or retained via statistical means? (statistical conclusion validity) Need reliable measures Need large enough sample to detect true effect & avoid Type 1 & 2 errors (see over) What is a null hypothesis? No effect proposed What is an alternative hypothesis? What is a directional hypothesis?
16 Types of Decisions based on Statistics Reality Conclusion Effect does not Exist Effect does not exist Correct Decision Effect Exists Type 1 Error Effect Exists Type 2 Error Correct Decision
17 How to Choose a Research Design Is the design efficient in using available resources? Optimal balance between research design, time, resources and researcher expertise
18 Research Methods & Design Outline Types of research design How to choose a research design Issues in research design
19 Issues in Research Design Research context Nature & size of sample Data sources
20 Issues in Research Design Research Context One or several organizational contexts Laboratory vs. field setting depends on Goal of establishing nature of phenomenon (or process) that exists in most contexts Generalizability of results Control required of extraneous/nuisance variables
21 Issues in Research Design Nature of sample Random vs. stratified Convenience sample Student vs. field based sample Size of sample determines Generalizability of results Ability to detect a true effect
22 Issues in Research Design Data Sources: Self report Common method variance Similar response format Consistency bias of participants Unreliability of measures Social desirability Alternative methods to questionnaire (e.g., interviews, behavioral, archival) Multiple times of data collection Alternative sources (e.g., supervisor, peer) Measure of individual s susceptibility to social desirability
23 Issues in Research Design Data Sources: Alternatives Co-workers (e.g., subordinates, supervisors, peers) Archival Biological Trace Objective term
24 Research Methods & Design Outline RECAP Types of research design How to choose a research design Issues in research design
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