204 Item Scoring 152. Although the majority of the items are dichotomously scored (that is, responses are awarded
either credit or no credit), the open constructed-response items can sometimes involve partial
credit scoring, which allows responses to be assigned credit according to differing degrees of
“correctness” of responses and or to the extent to which an item has been engaged with or not. It is
anticipated that the need for partial credit scoring will be particularly significant for the
mathematical reasoning items which will seldom involve the production of single number response
but rather responses with one or more elements.
