This document discusses assessment validity and reliability in technical and vocational education. It defines validity as whether a test measures what it is intended to measure and reliability as whether a test yields consistent results. There are three types of validity evidence: content, criterion, and construct validity. Content validity ensures test items adequately cover the domain. Criterion validity shows a test can predict future performance. Construct validity demonstrates a test captures the intended concept by correlating with similar tests and not correlating with dissimilar tests. The document also discusses standardized vs teacher-made tests and different forms of validity evidence like predictive, concurrent, convergent, and divergent validity.