8Hofer B K. Epistemological understanding as a metacognitive process:Thinking aloud during online searching [J ]. Educational Psychologist, 2004,39 ( 1 ) :43-55.
9Hofer B K. Dimensionality and Disciplinary Differ- ences in Personal Epistemology [J]. Contemporary Educational Psychology, 2000,25 (10) : 378-405.
10Hjorland B. Epistemology and the soeio-cognitive perspective in information science [J]. Journal of the American Society for Information Science and Technology, 2002 (3) :257- 270.