CSD 5100 Introduction to Research Methods in CSD

CSD 5100CSD 5100Introduction to Research Introduction to Research

Methods in CSDMethods in CSD

Group Designs in CSD Group Designs in CSD ResearchResearch

Experimental Design and a Experimental Design and a Little About Data AnalysisLittle About Data Analysis

The Class Research Project: The Class Research Project: MethodsMethods

Research DesignsResearch Designs

Plans that include protocols forPlans that include protocols forSelecting subjectsSelecting subjects

Controlling extraneous variablesControlling extraneous variablesVariables other than the independent Variables other than the independent

variable(s) we’re interested in that may variable(s) we’re interested in that may affect the dependent variableaffect the dependent variable

Observing the dependent variableObserving the dependent variable

Ensuring ethical proceduresEnsuring ethical procedures

Group Research DesignsGroup Research Designs

Designed to determine the effect of Designed to determine the effect of one or more independent variables one or more independent variables on a selected dependent variable by on a selected dependent variable by comparing performance, comparing performance, observations, whatever among observations, whatever among groups of subjectsgroups of subjects

Two Group Research Two Group Research DesignsDesigns

Randomized controlled two group designRandomized controlled two group design

Two Group Research Two Group Research DesignsDesigns

Quasi-experimental two-group designQuasi-experimental two-group design

Achieving Group Achieving Group EquivalenceEquivalence

Two steps are necessaryTwo steps are necessaryIdentify the relevant variables known to Identify the relevant variables known to

be related to the dependent variablesbe related to the dependent variables

Match the groups of participants on the Match the groups of participants on the basis of these variablesbasis of these variables

Complex Group DesignsComplex Group Designs

Complexity of the basic group design Complexity of the basic group design can be increased bycan be increased byHaving more than two levels to one Having more than two levels to one

independent variableindependent variable

Having more than one independent Having more than one independent variablevariable

All the aboveAll the above

Multivalent Research Multivalent Research DesignsDesigns

Factorial Research DesignsFactorial Research Designs

Attempt to model real-life events or Attempt to model real-life events or conditions in which multiple variables conditions in which multiple variables may affect behaviors jointlymay affect behaviors jointlyCombinations of two or more variables Combinations of two or more variables

sometimes produces a change in sometimes produces a change in behavior that’s not present when the behavior that’s not present when the effects of single independent variables effects of single independent variables are observedare observed

Classification of Factorial Classification of Factorial DesignsDesigns

Factorial research designs are generally Factorial research designs are generally classified in one of these waysclassified in one of these waysRelated designsRelated designs

Each subject experiences all treatment conditionsEach subject experiences all treatment conditions

Independent designsIndependent designsMatched subject groups experience a single treatment Matched subject groups experience a single treatment

condition (1 level of 1 independent variable)condition (1 level of 1 independent variable)

This is what our class project design will beThis is what our class project design will be

Mixed designsMixed designsCombination of related and independent designsCombination of related and independent designs

Factorial Design ModelFactorial Design Model

Example of a 2 X 2 Example of a 2 X 2 data summary data summary tabletable

Factorial Design Model for the Factorial Design Model for the Class ProjectClass Project

This is a 3 X This is a 3 X 2 2 independeindependent factorial nt factorial designdesign

GenderGender

MaleMale FemaleFemale

AgeAge

Young Young

KidsKids

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Older Older

KidsKids

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

AdultsAdults Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Factorial Design Model for the Factorial Design Model for the Class Project Adding a Third Class Project Adding a Third Independent VariableIndependent Variable

This would be a 3 X 2 This would be a 3 X 2 x 2 independent x 2 independent factorial designfactorial design

GenderGender


AgeAge

Young Young

KidsKidsVoiced vot1Voiced vot1

Voiced vot2Voiced vot2

Voiced votnVoiced votn




Unvoiced vot1Unvoiced vot1


Unvoiced votnUnvoiced votn




Older Older

KidsKidsVoiced vot1Voiced vot1












AdultsAdults Voiced vot1Voiced vot1












Class Project Data Analysis Class Project Data Analysis ModelModel

Voiced Voiced ConsonantsConsonants

GenderGender


AgeAge

Young Young

KidsKids

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Older Older

KidsKids

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn


Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Voiceless Voiceless ConsonantsConsonants

GenderGender


AgeAge

Young Young

KidsKids

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Older Older

KidsKids

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn


Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Vot 1Vot 1

Vot 2Vot 2

Vot 3Vot 3

Vot Vot nn

Class Research Project: Class Research Project: MethodsMethods

SubjectsSubjects

StimuliStimuli

Data collection methodsData collection methods

InstrumentationInstrumentation

Measurements of voice onset timeMeasurements of voice onset time

Anything else?Anything else?

Documents

CSD 5100 Introduction to Research Methods in CSD