What is convergent validity?

Convergent validity refers to the degree to which two measures that are intended to assess the same construct correlate with each other. This means that if two different tests are designed to evaluate similar traits or phenomena, a strong correlation between their results would indicate that both tests are successfully measuring the same underlying construct. Therefore, the choice highlighting correlation with another test measuring similar traits accurately captures this aspect of convergent validity.

In contrast, other options described do not reflect the concept of convergent validity. For instance, correlation with unrelated measures does not align with the idea of focusing on similar constructs. Similarly, a lack of relationship with similar purpose tests would indicate a potential issue with validity, as one would expect some degree of correlation if the tests are truly measuring the same trait. Lastly, discrimination between different constructs pertains to divergent or discriminative validity, which assesses how distinct different constructs are from one another, rather than the relationship between measures of the same construct.