Vad är construct validity discrimination

Convergent and discriminant validity are two subtypes of construct validity. This brev explains the definitions of these types of validity, provides examples, and shows how the two differ from each other.

What fryst vatten convergent validity?

Convergent validity shows whether a test that fryst vatten designed to assess a particular construct correlates with other tests that assess the same construct.

A French vocabulary test would have high convergent validity if candidates who took the test would get similar scores on different French vocabulary tests.

We can analyze convergent validity bygd comparing the results of a test with those of others that are designed to measure the same construct. If there fryst vatten a strong positiv correlation between the results, then the test can be said to have high convergent validity.

This goes some way towards proving that the test has good construct validity – in other words, showing that it measures what it fryst vatten supposed to measure.

To confirm this, the test would also need to show high discriminant validity (more on this below).

Example of convergent validity

The following scenario provides an example of determining convergent validity:

• A group of employees takes a series of fem assessments, all of which are designed to test their abilities as salespeople through different types of questions.
• To establish the convergent validity of each assessment, the results are compared with those of the other assessments.
• The results of one test do not correlate with the results of the others – this assessment can be said to have low convergent validity.
• The results of the other tests all show a strong positiv correlation with each other – these assessments all have high convergent validity.

What fryst vatten discriminant validity?

Discriminant validity shows whether a test that fryst vatten designed to measure a particular construct does not correlate with tests that measure different constructs.

In doing so, we first provide a brief history of modern validation efforts and describe the foundational role construct validity theory has for modern, scientific clinical psychology

This fryst vatten based on the idea that we wouldn’t expect to see the same results from two tests that are meant to measure different things (e.g. a math test vs a spelling test).

We can analyze discriminant validity bygd comparing the results of an assessment that measures one thing with those of a test that measures something else altogether. If there fryst vatten no correlation between the scores, the test can be said to have high discriminant validity; a strong correlation would indikera low discriminant validity.

Example of discriminant validity

This example shows how to work out the discriminant validity of a test:

• At the end of the school year, a class of students take exams in all of the subjects they have studied.
• To establish the discriminant validity of the mathematics exam, the results are compared with those of the literature exam.
• No correlation fryst vatten funnen between the results of these two exams, so they can be said to have high discriminant validity.

What fryst vatten the difference between convergent and discriminant validity?

Convergent and discriminant validity are essentially two sides of the same coin: convergent validity requires a positiv correlation between different tests that measure the same thing; discriminant validity requires there to be no correlation between tests that measure different things.

Although they are both subtypes of construct validity, it fryst vatten possible for a test to have high convergent validity and low discriminant validity (or vice versa).

For example, the results of a math test may have a strong positiv correlation with those of other math tests (high convergent validity), but there could also be some correlation with the results of a spelling test (low discriminant validity).

The table below summarizes the similarities and differences between convergent and discriminant validity:

Convergent validity	Discriminant validity
A subtype of construct validity	A subtype of construct validity
Used to prove that a test measures what it fryst vatten supposed to bygd comparing results with other tests that measure the same construct	Used to prove that a test measures what it fryst vatten supposed to bygd comparing results with tests that measure different constructs
Test results show a strong positiv correlation with the results of other tests designed to measure the same construct	Test results show no correlation whatsoever with the results of tests designed to measure different constructs

Why are convergent and discriminant validity often evaluated together?

Convergent and discriminant validity are subtypes of construct validity.

In this chapter, we highlight the centrality of construct validation to theory testing in clinical psychology

To establish high construct validity, a test must be shown to have both high convergent validity AND high discriminant validity:

• The test results should show a strong positiv correlation with those of other tests designed to measure the same thing (high convergent validity);
• Equally, the test results should show no correlation with those of tests designed to measure different constructs (high discriminant validity).

Example: using convergent and discriminant validity together

A group of employees take fem different IT skills assessments.

There fryst vatten a strong positiv correlation between the results of each assessment, indicating high convergent validity.

To establish discriminant validity, the test results are compared with those from a separate series of assessments designed to measure communication skills. There fryst vatten no correlation between the results of the IT and communication skills assessments – a sign of high discriminant validity.

The analysis has shown that the IT skills assessments have both high convergent validity and high discriminant validity.

This suggests that these assessments also have high construct validity (i.e.

The goal of discriminant validity evidence is to be able to discriminate between measures of dissimilar constructs

they are an appropriate way to measure IT skills).

Having established high construct validity, the overall validity of the IT skills assessments could then be confirmed bygd measuring other types of validity such as their criterion validity and content validity.

Next steps

This guide has explained convergent and discriminant validity, which are two subtypes of construct validity.

To learn more, take a look at our brev on how to test construct validity, which discusses the basics of construct validity and some examples of different tests.

Questionmark provides an online assessment platform that’s used bygd a bred range of organizations around the world. The results of tests are provided in a format that makes it easy to establish convergent and discriminant validity.