Take care that the validation task does not undermine the group task and that the teamwork skills integral to a group assignment are rewarded.

Take care also that the relationship of the validation to the final score and grade are clearly provided to students. Have a clear idea about what evidence you are looking for in the validation task. 

Take care that the validation task is so large that you have actually doubled the assessment load.

AI could help make individual tests based on the final product. 

Where AS specifies reflection on collaboration, the collaboration might be formative, but the reflection on process, substance and learning summative

Reflection on process, results, learning, choices, product can be a higher order task that can be the individual contribution to a group task.

For example:

Gibbs' Reflective Cycle | The University of Edinburgh

Gibbs' Reflective Cycle was developed by Graham Gibbs in 1988 to give structure to learning from experiences.  It offers a framework for examining experiences, and given its cyclic nature lends itself particularly well to repeated experiences, allowing you to learn and plan from things that either went well or didn’t go well. It covers 6 stages:

·Description of the experience

·Feelings and thoughts about the experience

·Evaluation of the experience, both good and bad

·Analysis to make sense of the situation

·Conclusion about what you learned and what you could have done differently

·Action plan for how you would deal with similar situations in the future, or general changes you might find appropriate.