Welcome to

[ ]Dr. Myrza Rahmanita, SE, M.ScMeasurement

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MEASUREMENT

FIRST LET’S WE SEE ABOUTThe Learning Objectives

The distinction between measuring objects, properties, and indicants of properties.

The similarities and differences between the four scale types used in measurement and when each is used.

The four major sources of measurement error.

The criteria for evaluating good measurement.

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MEASUREMENT

11-5

Selectmeasurable phenomena

Develop a set of mapping rules

Apply the mapping ruleto each phenomenon

As Shown in the diagram below …

CHARACTERISTICof Measurement

11-7

As Shown in the explanation below …

LEVELof Measurement

11-9

Ordinal

Interval

Ratio

Nominal Classification

As Shown in the diagram below …

TYPESof Scales

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Ordinal

Interval

Nominal

Ratio

As Shown in the diagram below …

NOMINALScales

11-13

MUTUALLY EXCLUSIVE AND,COLLECTIVELY EXHAUSTIVE

CATEGORIES,EXHIBITS ONLY CLASSIFICATION

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LEVELof Measurement

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Ordinal

interval

Ratio

Nominal Classification

OrderClassification

As Shown in the diagram below …

ORDINALScales

•Characteristics of nominal scale •Order•Implies greater than or less than

11-17

As Shown in the explanation below …

LEVELof Measurement

11-19

Ordinal

interval

Ratio

Nominal Classification

OrderClassification

OrderClassification Distance

As Shown in the diagram below …

ORDINALScales

• Characteristics of nominal and ordinal scales • Equality of interval. • Equal distance between numbers

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LEVELof Measurement

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Ordinal

interval

Ratio

Nominal Classification

OrderClassification

OrderClassification Distance

Natural Origin

OrderClassification Distance

As Shown in the diagram below …

RATIOScales

Ratio Scales

11-25

Characteristics of nominal, ordinal, interval scalesAbsolute zero

FROM INVESTIGATEto Measurement Question

11-27

As Shown in the diagram below …

SOURCESof Error

11-29

Respondent

InstrumentMeasurer

Situation

As Shown in the diagram below …

EVALUATING MEASUREMENTTools

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Criteria

Validity

Practicality Reliability

As Shown in the diagram below …

VALIDITYDeterminants

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Content

ConstructCriterion

As Shown in the diagram below …

INCREASINGContent Validity

Increasing Content Validity

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ContentLiterature Search

Expert Interviews

Group Interviews

Question Database

Etc.

As Shown in the diagram below …

VALIDITYDeterminants

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Content

Construct

As Shown in the diagram below …

INCREASINGConstruct Validity

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New measure of trust

Known measure of trust

Empathy

Credibility

As Shown in the diagram below …

VALIDITYDeterminants

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Content

ConstructCriterion

As Shown in the diagram below …

JUDGING CRITERIONValidity

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Relevance

Freedom from bias

Reliability

Availability

Criterion

As Shown in the diagram below …

UNDERSTANDINGValidity and Reliability

11-45

As Shown in the diagram below …

RELIABILITYEstimates

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Stability

InternalConsistency Equivalence

As Shown in the diagram below …

PRACTICALLY

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Economy InterpretabilityConvenience

As Shown in the diagram below …

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Last is Key TermsRemembering the Words beside …

• Internal validity• Interval scale• Mapping rules• Measurement• Nominal scale• Objects• Ordinal scale• Practicality• Properties

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Last is Key TermsRemembering the Words beside …

• Ratio scale• ReliabilityEquivalenceInternal consistencyStability• ValidityConstructContentsCriterion-related