Answer:
A portfolio assessment is a two step process. Firstly it involves making a determination as to whether the evidence (or document) is applicable to the standards being assessed against and; secondly; making a judgment about whether the standard has been met by each piece of evidence contained within the portfolio. By its very nature, each peice of evidence must be valid, current, sufficient and authentic. A key principal of assessment is suffiency, which means, there is cumulative occurances of evidence that demonstrate the standard has been met. Therefore the answer is cumulative.