activity level

in comparative examinations, the factors by which the material was left (transfer) and remained (persistence). 

Discussion—Factors include the presence of the evidence in a particular location (for example, glass found embedded in the sole of a shoe versus glass found on a shirt), quantity (for example, multiple glass fragments versus a single glass fragment), and condition (for example, pulled hair versus shed hair).

Discussion—Alternative hypotheses of alleged activities may also be part of the factors considered.