An algorithmic theory of learning: Robust concepts and random projection

  • Authors:
  • Rosa I. Arriaga;Santosh Vempala

  • Affiliations:
  • Department of Psychology, Southern New Hampshire University, Manchester 03106;Department of Mathematics, M.I.T., cambridge 02139-4307

  • Venue:
  • Machine Learning
  • Year:
  • 2006

Quantified Score

Hi-index 0.02

Visualization

Abstract

We study the phenomenon of cognitive learning from an algorithmic standpoint. How does the brain effectively learn concepts from a small number of examples despite the fact that each example contains a huge amount of information? We provide a novel algorithmic analysis via a model of robust concept learning (closely related to "margin classifiers"), and show that a relatively small number of examples are sufficient to learn rich concept classes. The new algorithms have several advantages--they are faster, conceptually simpler, and resistant to low levels of noise. For example, a robust half-space can be learned in linear time using only a constant number of training examples, regardless of the number of attributes. A general (algorithmic) consequence of the model, that "more robust concepts are easier to learn", is supported by a multitude of psychological studies.