The enhancing effect of incongruent verbal priming stimuli on the CIT effect with pictorial probes in the P300-based complex trial protocol

Publication date: Available online 2 January 2020Source: International Journal of PsychophysiologyAuthor(s): Tingting Sui, Evan Sitar, J. Peter Rosenfeld, Elena Labkovsky, Anne Ward, Elena DavydovaAbstractPrevious research indicated that certain types of incongruent verbal priming enhance responding to the subsequent (primed) stimuli. By priming participants in a P300-based Concealed Information Test(CIT), we examined the possible enhancement effects of priming stimuli in the P300 based Complex Trial Protocol (CTP) for face recognition. Participants were divided into two groups: one group with priming and one control group without. The priming group was called the non-identical priming (NIP) group in which the verbal priming item (the name, “Bill Smith”) is identical with neither probe nor irrelevants, which were pictures of the actor Tom Cruise (probe) and of other unknown faces (irrelevants). The group without priming is the control group that experiences the basic Complex Trial Protocol. The probe and irrelevants of the two groups were faces. Results were that non-identical priming produced larger CIT effects than the control group, which is consistent with earlier findings. Also, the amplitude of the probe of NIP group is larger than that of NP group, while their irrelevants didn't show a significant difference. This means that the incongruent verbal priming did enhance the P300 CIT effect for the probe, which could further improve the accuracy of CTP for the conceale...

Source: International Journal of Psychophysiology - January 3, 2020 Category: Psychiatry & Psychology Source Type: research