Educational Psychology, Stanford University (1967) Marcia C. Linn (née Cyrog) is an American professor, specializing in personal development and cognitive processes.

Linn's father was a supervisor in the postal service as well as a rockhound who founded the Whittier Gem and Mineral Society.

While in Geneva, Linn spent time in schools, interviewing students using the Piagetian clinical method.

When she returned to California, Linn conducted many interviews in which she asked students to explore scientific problems, which formed the basis for her perspective on knowledge integration.

[citation needed] Linn was a Research Psychologist at the Lawrence Hall of Science (1970–1987) and led the ACCEL program, a National Science Foundation-funded research project that investigated the cognitive consequences of computer environments for learning.

She has served as Chair of the AAAS Education Section and as President of the International Society of the Learning Sciences.