1. Conflict, Arousal and Curiosity;Berlyne,1960
2. Reinforcement, expectancy and learning;Bolles;Psychol. Rev.,1972
3. Response by rats to differential stimulus complexity;Dember;J. Comp. Physiol. Psychol.,1957
4. The Perception of the Visual World;Gibson,1950
5. The Ecological Approach to Visual Perception;Gibson,1979