TY  - RPRT
TI  - Using the observer to analyze learning in virtual worlds.
AU  - Elhanan Gazit
AU  - David Chen
PY  - 2003
DO  - 10.3758/bf03195517
UR  - https://pubmed.ncbi.nlm.nih.gov/14587548/
ID  - 14587548
ER  -