Paradigma oddball e P300

The Oddball Paradigm is a target-detection task. Participants are asked to

respond by pressing a button whenever they see visual or auditory stimuli

that occur infrequently and irregularly within a standard series. As such,

the experimenter shows a series of symbols a repeated number of times

until the participant becomes habituated to the pattern. A pattern might consist of three black circles followed by two yellow squares. Suddenly,

after the standard is established a green triangle appears in between the

black circles and the yellow squares. This pattern breaking detection is

related with a positive brain potential that rises at 300ms post diverging

stimulus: the P300.

(traduzir e expandir)

SOTO, M. et al. In what context does context matter? An ERP study of sentence processing

in Brazilian Portuguese Letras de Hoje, Porto Alegre, v. 59, n. 1, p. 120-130, jan.-mar. 2015