But what is internal validity in scientific terms? The internal validity definition indicates a trustworthy cause-and-effect relationship between the variables within a study.

Internal Validity Definition in Psychology In psychological research, validity is the extent to which a researcher is able to measure a specific idea or concept.

Explore the differences between internal vs. external validity. Learn how the requirements are important to scientific study and how replication works in research.

Is internal consistency a form of reliability? Internal consistency is a form of reliability. The process measures the items on the test and their validity to the content of the test.

What is validity in psychology? Learn about types of validity, internal and external validity, content vs. construct validity, reliability, and validity examples.

When conducting research to show the effectiveness of a treatment, threats to internal validity can weaken the experiment's conclusions. Understand three of these threats -- history, subject ...

Internal validity, which is the assertion that the independent variable is what truly caused the observed effect, is paramount to conclusive research. Explore the concept of both internal and ...

Learn the definition, importance, and examples of internal validity in research in just 5 minutes. Watch now and test your knowledge by taking an optional quiz.

In research, the strength of the relationship between the dependent and independent variables can be affected by threats to internal validity. Explore threats such as maturation, which can be ...

Learn the difference between reliability and validity of measurement. See the measurement validity definition. Understand the 4 types of measurement validity.