Recursive hierarchical embedding allows humans to generate multiple hierarchical levels using simple rules. We can acquire recursion from exposure to linguistic and visual examples, but only develop the ability to understand "multiple-level" structures like "[[second] red] ball]" after mastering "same-level"…

Sequence learning is fundamental to a wide range of cognitive functions. Explaining how sequences--and the relations between the elements they comprise--are learned is a fundamental challenge to cognitive science. However, although hundreds of articles addressing this question are published each year, the actual learning mechanisms involved in the…

A hypothesized hierarchy of tasks in the development of tactual discrimination (an essential skill for reading) was tested in 60 blind primary level children. For five braille and five Optacon (optical to tactile converter) sequences, Ss were asked to identify the different stimulus from the four presented. Scalogram analysis was used to examine…