Visualizing spatial material is a cornerstone of human problem solving, but human visualization capacity is sharply limited. To investigate the sources of this limit, we developed a new task to measure visualization accuracy for verbally-described spatial paths (similar to street directions), and implemented a computational process model to…

Four experiments with 88 college students investigated whether variations in orientation that affect the ability to imagine rotations also affect the ability to imagine projective transformations. Results suggest that imagination of projection and rotation involves organization of spatial structures in relation to initially given properties of the…

Two characteristics that determine problem difficulty--the nature of the move search space and its interaction with other aspects of the task--were investigated in experiments in which 26, 69, 42, and 42 community college students attempted to solve the Chinese Ring Puzzle. The origins and implications of difficulty are discussed. (SLD)