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Research SystemTheory
Hypotheses
Data
Verification
Theory buildingHypothesis generation
Measurement issuesResearch designSampling issues
Statistical analysis
Interpretation
Presentation of results
Generalization
CulminationModification
Research Strategies
“All research strategies are seriously flawed…”
McGrath, J. E. Martin, J., & Kulka, R. A. (1982). Judgment Calls in Research. Beverly Hills, CA: SAGE Publications Inc.
A Three-Horned DilemmaDifferent methods have different strengths:
• Rigor• Relevance• Generalizability
Every research strategy either avoids two of the horns byan uneasy compromise but gets impaled, to the hilt, onthe third horn; or it grabs the dilemma boldly by onehorn, maximizing on it, but at the same time “sittingdown” (with some pain) on the other two horns.
(McGrath, 1982: 74)
Dilemmatics: McGrath TaxonomyThe study of research choices and tradeoffsThere is no perfect study. Research involves
tradeoffs Research looks at Actors emitting Behaviors
in a ContextWe want
Generalizability from Actors populationPrecise measure and control of Behavior Realistic Contexts for observation of actor
behavior
J
II
I
IV
III
Judgment Task
Sample Survey
Formal Theory
ComputerSimulation
Field Study
Field Experiment
Lab Experiment
ExperimentalSimulation
RELEVANCE
GENERALIZABILITY
RIGOR
Q I: Field StrategiesField study– No deliberate manipulation; everything is
measured– Naturally occurring setting– Example: Survey of QWL in 100 organizations
Field experiment– Deliberate manipulation of one or more variables– Naturally occurring setting– Example: Hawthorne studies; Greenberg’s work
RELEVANCE
Q II: Experimental StrategiesLaboratory experiment– Deliberate manipulation of variables– Contrived setting– Example: Effects of communication channels on
team performance, effects of feedback and goal-setting on individual performance
Experimental simulation– Deliberate manipulation of variables– Contrived realistic setting– Example: Center for Creative Leadership Looking
Glass simulation; Zimbardo prison experiment – http://www.youtube.com/watch?v=JxGEmfNl-xM
RIGOR
Q III: Respondent StrategiesJudgment tasks– Emphasis on task/judgment selection, often
with a limited number of participants– All variables are measured– Example: “policy capturing” studies, creation
of the competing values frameworkSample Survey– Emphasis on sample selection– All variables measured– Example: National Survey of Organizations
GENERALIZABILITY
Q IV: Theoretical StrategiesFormal theory/literature reviews– No actual research participants– Summarize the literature to create new
models for testing (inductive process)Computer Simulations– No actual research participants– All outcomes are computer- generated– Example: garbage can decision-making
processes, monte carlo studies
GENERALIZABILITY
Integrative & Hybrid StrategiesBecause every methodological choice is
flawedor incomplete, you can decrease the effects of the trade-offs by:Using different methods across studiesUsing multiple methods within a single studyPackaging different studies with different
methods together
Alternatively, Three Study TypesExperimentalQuasi-ExperimentalCorrelational or passive observational
study (field)Single subject (case study)
Important Concepts: The Building Blocks of Research MethodsIndependent VariableDependent VariableExtraneous VariableHypothesisExperiment
Causal InferenceConditions needed for causality
Covariation of cause and effectTemporal precedence (cause must come before
effect in time)Control to rule out alternative interpretations
True experiments are best suited to infer causality because the include the greatest degree of control
Apply MAXIMINICON principleMaximize relevant systematic varianceMinimize irrelevant systematic varianceControl extraneous sources of variance
What is a TRUE experiment?There must be manipulation
Manipulation of a cause results in an effectThere must be random assignment to
experimental conditionsThere must be control of extraneous
variable
ExperimentAdvantages
high degree of controlstrong inference of causalitymeasurement of behavior is preciseoften laboratory experiments can be replicated
easilyDisadvantages
low realismlow external validity in generalsome phenomena cannot be analyzed in a laboratorysome variables may have a weaker (or stronger)
impact in the lab than they would in a natural environment
Quasi-ExperimentAdvantages
high realismgreater external validitymoderate degree of controlmoderate to high inference of causality
Disadvantagesinternal validity may be compromisedexternal validity may be compromisedmeasurement may be impreciseit may be difficult to get people to agree to
participateit is often difficult to get access to many field
settings
Correlational Field StudyAdvantages
realisticdata on a large number of variables can be
collectedthe researcher's impact on the study is often
lowerallows exploration of contextual effects
Disadvantagescausality is difficult to assessinternal validity may be compromisedexternal validity may be compromisedorganizations may not agree to participatemeasurement of variables less precise than lablow response rate common
Single Subject/Case StudyAdvantages
good for low base rate occurrencesprovides source of rich and descriptive datagood for generating new ideas
Disadvantageslow internal and external validity
Threats to ValidityValidity = the confidence we can have that
our findings from any study are “true”All research has threats to validity – that is,
things that minimize the degree to which we can embrace a particular finding as “true”
Many sources of validity threats but two common ones: Research participantsResearchers themselves
Threats due to ParticipantsRoles
Good subjectFaithful subjectNegativistic subjectApprehensive subject
Role Multiplicity and ConflictAttributes of ParticipantsComprehension artifact
They misunderstand
Threats due to Researcher Attributes of researchers Expectancies Designer, observer, and interpreter effects Data analyst Tester
Poor measurement decisions
Week 2 AssignmentDescribe a research topic that you are
interested inWrite three hypothesis statements about
relationships you might expectIdentify what the IVs and DVs are in these
relationshipsIf there are mediators or moderators in your
hypothesis statements, identify what these areIndentify the type of research strategy you
would use to study this research questionUse the article you identified last week as
your reference