Detection versus discrimination of visual orientation.

@article{Sagi1984DetectionVD,
  title={Detection versus discrimination of visual orientation.},
  author={Dov Sagi and B{\'e}la Julesz},
  journal={Perception},
  year={1984},
  volume={13 5},
  pages={619-28}
}
The role of focused attention in vision is examined. Recent theories of attention hypothesize that serial search by focal attention is required for discrimination between different combinations of features. Experiments are reported which show that the mixture of a few (less than five) horizontal and vertical line segments embedded in an aggregate of diagonal line segments can be rapidly counted (also called 'subitizing') by a parallel (preattentive) process, while the discrimination between… CONTINUE READING

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