For example, a method where a participant is required to click a button as soon as a stimulus appears and this time is measured appears to have face validity for measuring reaction time. Each type views validity from a different perspective and evaluates different relationships between measurements.įace validity-This refers to whether a technique looks as if it should measure the variable it intends to measure. There are 4 main types of validity used when assessing internal validity. However, here I will focus on the validity of the measurement technique (i.e. Both are very important in analysing the appropriateness, meaningfulness and usefulness of a research study. ![]() Internal validity refers to the validity of the measurement and test itself, whereas external validity refers to the ability to generalise the findings to the target population. There are two main types of validity, internal and external. Validity is described as the degree to which a research study measures what it intends to measure.
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