IB Psychology Topic 1.4.3 Reliability and Validity of Measures Revision Notes (SL/HL)

IB Psychology Topic 1.4.3 Reliability and Validity of Measures Revision Notes (SL/HL) | RevisionDojo

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Reliability and Validity of Measures

Definition

Reliability

Reliability refers to the consistency of diagnostic outcomes among clinicians.

Definition

Validity

The extent to which a measure accurately reflects the construct it is intended to measure.

In psychological research, reliability and validity are two essential criteria for evaluating the quality of measurements and results.
Both are crucial for ensuring that research findings are trustworthy and meaningful.
Reliability refers to the consistency of a measurement tool or procedure. A reliable measure produces the same results under consistent conditions.

Analogy

Think of a bathroom scale:

If it shows the same weight every time you step on it, it's reliable.
If it shows your true weight, it's valid.
A scale that always shows 5 kg more than your actual weight is reliable but not valid.

Types of Reliability

Test-Retest Reliability: Consistency of results when the same test is administered to the same group at different times.
Inter-Rater Reliability: Consistency of results when different observers or raters assess the same phenomenon.
Internal Consistency: Consistency of results across items within a test.

Example

A personality test that yields similar scores when taken a month apart demonstrates test-retest reliability.
Two psychologists independently observing the same behavior and recording similar results show inter-rater reliability.

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Note

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Tip

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IB Psychology 1.4.3 Reliability and Validity of Measures Notes

Reliability and Validity of Measures

Types of Reliability

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Reliability and Validity of Measures

Types of Reliability

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1. Concepts6 subtopics

2. Content4 subtopics

3. Contexts4 subtopics

4. Extensions (HL only)4 subtopics

IB Psychology 1.4.3 Reliability and Validity of Measures Notes

1. Concepts6 subtopics

2. Content4 subtopics

3. Contexts4 subtopics

4. Extensions (HL only)4 subtopics

Reliability and Validity of Measures

Types of Reliability

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Reliability and Validity of Measures

Types of Reliability

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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