Effect of Operation Intention on P300 Component in Tractor HMI Discrimination Task

This investigation examined the response strategies and discrimination accuracy of adults and children aged 5–10 as the ratio of same to different trials was varied across three conditions of a “change/no-change” discrimination task. The conditions varied as follows: (a) a ratio of one-third same to two-thirds different trials (33% same), (b) an equal ratio of same to different trials (50% same), and (c) a ratio of two-thirds same to one-third different trials (67% same). Stimuli were synthetic consonant-vowel syllables that changed along a place of articulation dimension by formant frequency transition. Results showed that all subjects changed their response strategies depending on the ratio of same-to-different trials. The most lax response pattern was observed for the 50% same condition, and the most conservative pattern was observed for the 67% same condition. Adult response patterns were most conservative across condition. Differences in discrimination accuracy as measured by P(C) were found, with the largest difference in the 5- to 6-year-old group and the smallest change in the adult group. These findings suggest that children’s response strategies, like those of adults, can be manipulated by changing the ratio of same-to-different trials. Furthermore, interpretation of sensitivity measures must be referenced to task variables such as the ratio of same-to-different trials.

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Event-related coherent gamma-activity on human scalp EEG during visuospatial discrimination task

Electroencephalography and Clinical Neurophysiology ◽

10.1016/s0013-4694(97)88724-3 ◽

1997 ◽

Vol 103 (1) ◽

pp. 156-157

Author(s):

T Matsuoka

Keyword(s):

Discrimination Task ◽

Gamma Activity ◽

Scalp Eeg

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P300 Amplitude and Topography in an Autobiographical Oddball Paradigm Involving Simulated Amnesia

Journal of Psychophysiology ◽

10.1027//0269-8803.16.1.1 ◽

2002 ◽

Vol 16 (1) ◽

pp. 1-11 ◽

Cited By ~ 17

Author(s):

Antoinette R. Miller ◽

J. Peter Rosenfeld ◽

Matthew Soskins ◽

Marianne Jhee

Keyword(s):

Task Difficulty ◽

Event Related Potential ◽

P300 Amplitude ◽

Oddball Paradigm ◽

Amplitude Difference ◽

P300 Component ◽

Oddball Task

Abstract The P300 component of the event-related potential was recorded during two blocks of an autobiographical oddball task. All participants performed honestly during the first block (Phone), i.e., the oddball stimuli were phone numbers. During the second block (Birthday), in which the oddball stimuli were participants' birthdays, a Truth group (N = 13) performed honestly and a Malinger group (N = 14) simulated amnesia. Amnesia simulation significantly reduced P300 amplitudes, both between groups and within the Malinger group (Phone vs. Birthday), possibly because of an increase in task difficulty in the Malinger condition. Analysis of scaled amplitudes also indicated a trend for a feigning-related alteration in P300 topography. Bootstrapping of peak-to-peak amplitudes detected significantly more (93%) Malinger individuals than bootstrapping of baseline-to-peak amplitudes (64%). Bootstrapping also provided evidence of a feigning-related amplitude difference between oddball stimuli (i.e., Phone > Birthday) in 71% of Malinger group individuals. In this comparison, the peak-to-peak measure also performed significantly better in intraindividual diagnostics.

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Response-Specific Scalp Distributions in Deception Detection and ERP Correlates of Psychopathic Personality Traits

Journal of Psychophysiology ◽

10.1027/0269-8803.18.1.13 ◽

2004 ◽

Vol 18 (1) ◽

pp. 13-26 ◽

Cited By ~ 13

Author(s):

Antoinette R. Miller ◽

J. Peter Rosenfeld

Keyword(s):

Deception Detection ◽

Event Related Potential ◽

Psychopathic Personality ◽

P300 Amplitude ◽

Group Differences ◽

Post Hoc Analysis ◽

P300 Component ◽

Psychopathic Personality Inventory ◽

Post Hoc ◽

First Time

Abstract University students were screened using items from the Psychopathic Personality Inventory and divided into high (n = 13) and low (n = 11) Psychopathic Personality Trait (PPT) groups. The P300 component of the event-related potential (ERP) was recorded as each group completed a two-block autobiographical oddball task, responding honestly during the first (Phone) block, in which oddball items were participants' home phone numbers, and then feigning amnesia in response to approximately 50% of items in the second (Birthday) block in which oddball items were participants' birthdates. Bootstrapping of peak-to-peak amplitudes correctly identified 100% of low PPT and 92% of high PPT participants as having intact recognition. Both groups demonstrated malingering-related P300 amplitude reduction. For the first time, P300 amplitude and topography differences were observed between honest and deceptive responses to Birthday items. No main between-group P300 effects resulted. Post-hoc analysis revealed between-group differences in a frontally located post-P300 component. Honest responses were associated with late frontal amplitudes larger than deceptive responses at frontal sites in the low PPT group only.

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