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Reliability of P50 auditory event‐related potential indices of sensory gating
Author(s) -
SMITH DAVID A.,
BOUTORS NASHAAT N.,
SCHWARZOPF STEVEN B.
Publication year - 1994
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1994.tb01053.x
Subject(s) - generalizability theory , psychology , sensory gating , audiology , auditory event , reliability (semiconductor) , n100 , significant difference , statistics , event related potential , developmental psychology , gating , cognition , mathematics , physics , neuroscience , medicine , power (physics) , quantum mechanics
We examined the reliability of three traditional P50 auditory event‐related potential indices under paired‐click conditions: (a) the conditioning response ( C ), (b) the testing response ( T ), and (c) the testing to conditioning suppression ratio ( T/C ). Three alternative indices, (a) the ( C−T ) difference, (b) the ( C−T )/( C+T ) adjusted difference, and (c) the ( T−T ) residualized difference, where T ′ is the regression of T on C , were also studied. The N 100 wave was used as a generalizability check. Although C and T amplitudes were reliably were reliably measured by traditional means, the T/C suppression ratio was not. for psychometric reasons that are described, the reliability of the suppression ratio is undermined principally by the correlation between C and T. The C−T difference score is a promising alternative to the unreliable T/C suppression ratio. Theoretical consequences of changed metrics are discussed.