1. There are challenges in testing productive language skills like writing and speaking, such as eliciting representative samples of ability and obtaining reliable scores.
2. These problems can be addressed by setting appropriate tasks, restricting responses, selecting test formats, and developing reliable scoring criteria like analytic scales that separate different aspects of ability.
3. When developing tests, it is important to consider the purpose of the test and whether a holistic or analytic approach would be most appropriate and useful.