Assessment in Primary Science

Alan Howe | View as single page |


The classic way of defining the validity of an assessment tool is the extent to which it measures what it was designed to measure. For example, a test of science knowledge should not depend on reading skill. However validity is not a fixed property of an assessment tool. It can be seen as an appraisal of the quality of the interpretations and decisions that are made on the basis assessment – valid assessments can be strongly justified by reference to evidence of learning.