How Many Variables Can Humans Process?

@article{Halford2005HowMV,
  title={How Many Variables Can Humans Process?},
  author={Graeme S. Halford and Rosemary Baker and Julie E. McCredden and John D. Bain},
  journal={Psychological Science},
  year={2005},
  volume={16},
  pages={70 - 76}
}
The conceptual complexity of problems was manipulated to probe the limits of human information processing capacity. Participants were asked to interpret graphically displayed statistical interactions. In such problems, all independent variables need to be considered together, so that decomposition into smaller subtasks is constrained, and thus the order of the interaction directly determines conceptual complexity. As the order of the interaction increases, the number of variables increases… 

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