Problem size effect in additions and subtractions: an event-related potential study.

@article{NezPea2005ProblemSE,
  title={Problem size effect in additions and subtractions: an event-related potential study.},
  author={Mar{\'i}a Isabel N{\'u}{\~n}ez-Pe{\~n}a and Maria Luisa Honrubia-Serrano and Carles Escera},
  journal={Neuroscience letters},
  year={2005},
  volume={373 1},
  pages={21-5}
}
The psychophysiological basis of problem size effect in the arithmetical processing of additions and subtractions was studied with event-related brain potentials (ERP). Subjects were presented sequences of seven numbers, and ERPs elicited to the sixth number were analyzed. Two variables were manipulated: operation type (addition and subtraction) and problem size (by adding or subtracting 2, 3 or 4). Results showed two phases in the ERP pattern: an early phase, appearing to reflect automatic… CONTINUE READING

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