Keyphrases
- intelligent tutoring systems
- authoring tool
- tutoring system
- student model
- intelligent tutoring
- constraint based modeling
- intelligent tutors
- cognitive model
- student modeling
- educational systems
- interactive systems
- interactive learning environments
- affective states
- affect recognition
- instructional systems
- facial expressions
- intelligent learning environments
- learner models
- pedagogical agents
- web based learning systems
- concept maps
- web based learning environments