validity of measurement

VALIDITYMEAOFSUREMENT

WHATISVALIDITYOFSURE

MEAMENT?

VALIDITY OFMEASUREMENT

- refers to the extent to which the measuring instrument measures what it is supposed to measure.

VALIDITY OFMEASUREMENT

“Does the measuring instrument measure the characteristics, traits, or whatever, for which it is supposed to measure?”

APPROACHES USED TO DETERMINE THE VALIDITY

OF MEASUREMENT

1. Logical Analysis2. Empirical Analysis

LOGICAL ANALYSIS

- focuses on the content of the test or measuring instrument.

EXAMPLE:Measuring the Students’

Learning InterestINDICATORS

Coming to school on timeDoing his assignment everydayAchieving high scores in the testsActive class participation

EMPIRICAL ANALYSIS

- uses criterion measurement.

“criteria-based”

EXAMPLE:Measuring the Students’ Academic Performance

CRITERIAAchievement test resultsSubmission of projects/assignments

A test is not valid if not properly used for a particular purpose and for a particular group.

TYPESITYVALIDOF

SUREMEAOF

MENT

1. Content Validity2. Construct Validity3. Concurrent Validity4. Predictive Validity

TYPES:

- the degree to which a test measures an intended content area.

- Includes FACE and SAMPLING VALIDITY.

CONTENT VALIDITY

-concerned with whether the test measures the intended content area.

-Determined by a review of the items.

FACE VALIDITY

- concerned with how well the test samples the total content area.

- Not everything can be covered, so items need to be sampled from all of the domains.

SAMPLING VALIDITY

- the degree to which a test measures an intended hypothetical construct.

CONSTRUCT VALIDITY

CONCURRENT VALIDITY

- the degree to which the scores on another already established test administered at the same time or to some other valid criterion available at the same time.

CONCURRENT VALIDITY

1. Relationship Method2. Discrimination Method

RELATIONSHIP METHOD

- determines the relationship on the test and scores on other established test.

DISCRIMINATION METHOD

- determines whether test scores can be used to discriminate between persons who posses a certain characteristic and those who do not, or those who posses it to a greater degree.

PREDICTIVE VALIDITY

- the degree to which a test can predict how well and individual will do in a future situation.