Item Roles Explored in a Modified P300-Based CTP Concealed Information Test

Abstract

In this study, we introduced familiarity-related inducer items (expressions referring to the participant’s self-related, familiar details: “mine,” “familiar”; and expressions referring to other, unfamiliar details, e.g., “other,” “irrelevant”) to the Complex Trial Protocol version of the P300-based Concealed Information Test (CIT), at the same time using different item categories with various levels of personal importance to the participants (forenames, birthdays, favorite animals). The inclusion of inducers did not significantly improve the overall efficiency of the method as we would have expected considering that these inducers should increase awareness of the denial of the recognition of the probes (the true details of the participants), and hence the subjective saliency of the items (Lukács, Kleinberg, & Verschuere, 2017). This may be explained by the visual similarity of inducers to the probe and irrelevant items and the consequent distracting influence of inducers on probe-task performance. On the other hand, the CIT effect (probe-irrelevant P300 differences) was always lower for less personally important (low-salient) and higher for more personally important (high-salient) items.

Addressing selective attrition in the enhanced response time‐based concealed information test: A within‐subject replication

“…If this were true (i.e., if the findings of Lukács et al, 2017, were a mere artifact), then not only would all the important practical implications be wrong, but all follow‐up studies and considerations would be based on a fallacy. Indeed, already several follow‐up studies have been published (e.g., Lukács, Grządziel, Kempkes, & Ansorge, 2019; Olson, Rosenfeld, & Perrault, 2019; Suchotzki, De Houwer, Kleinberg, & Verschuere, 2018), and even more are in progress. Therefore, assessing this potential confound is an urgent matter.…”