Psychometric Properties and Principles

The reliability and validity of a psychological test, measuring its consistency and accuracy in assessing what it intends to measure.

The degree to which a measurement or test consistently produces the same results over time and under different conditions.

The extent to which a test or measure accurately measures what it intends to measure. It ensures that the results are meaningful and reliable.

The process of establishing uniformity and consistency in procedures, protocols, or products to ensure efficiency, quality, and compatibility across different contexts or industries.

Rules or standards of behavior that are accepted and expected within a particular society or group. They guide our actions and help maintain social order and cohesion.

The consistency of test results when the same test is administered to the same individuals at two different time points. Measures the stability of the test over time.

Measures the agreement between different raters or observers when assessing the same phenomenon.

Measures the extent to which items within a test or scale are consistent in measuring the same construct.

Measures the consistency of results between different versions of the same test.

Measures the consistency of results by splitting a test into two halves and comparing the scores.

Refers to the extent to which a study accurately measures the cause-and-effect relationship between variables within a controlled setting.

Relates to the generalizability of research findings to the real world or other populations.

Involves the degree to which a measurement accurately assesses the theoretical construct it intends to measure.

Refers to the extent to which a measurement covers all relevant aspects of the construct being measured.

Assesses the degree to which a measurement correlates with an established criterion or gold standard.

Measures the extent to which a new measurement correlates with an existing measurement of the same construct.

Determines the extent to which a measurement predicts future outcomes or behaviors.

Involves the subjective judgment of whether a measurement appears to measure what it intends to measure.

Involve the use of statistical methods to analyze test data.

It is a statistical technique used in educational assessment to evaluate the quality of test items. It helps identify the effectiveness of individual test questions and provides insights into student performance.

There are two main types of item analysis:

It is a statistical method used to identify underlying factors or dimensions within a set of observed variables. It aims to reduce the complexity of data by grouping variables that are highly correlated.

There are two main types of factor analysis:

It is a statistical process used to adjust scores from different versions or forms of a test to ensure comparability. It aims to account for differences in difficulty between test forms and establish a common scale for score interpretation.

There are three main types of test equating methods: