scholarly journals The Intention to Conceal Does Not Always Affect Time Perception

2021 ◽  
Vol 12 ◽  
Author(s):  
Izumi Matsuda ◽  
Hiroshi Nittono
Keyword(s):  
Time Perception ◽  
The Other ◽  
Concealed Information Test ◽  
Display Duration ◽  
Online Experiments ◽  
The Difference ◽  
Arousal Effect ◽  
High Level ◽  
Concealed Information ◽  
Information Test

The display duration of stimuli is overestimated due to the increase in phasic arousal induced by the stimuli or high levels of background arousal. A previous study demonstrated that display duration of items (2 s) was overestimated when a participant attempted to conceal one of the items so as not to be detected in the concealed information test (CIT). As the time perception remained the same between the item to be concealed and the other items, the overestimation was thought to be due to the high level of background arousal under the conceal condition. Duration of 2 s may be too long to examine the phasic arousal effect induced by the concealed item. The present study conducted three online experiments with shorter durations, that is, each of three items was presented with duration of 1, 0.5, and 2 s in Experiments 1, 2, and 3, respectively. The participants were instructed to conceal one of the three items under the conceal condition and did not conceal any item in the innocent condition. The difference in time perception between the conceal and innocent conditions or between items under the conceal condition was observed in none of the three experiments. The result indicates that temporal overestimation does not occur when a participant is only concealing an object. Rather, temporal overestimation would occur only when the level of background arousal is amplified by the concealment.

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

2019 ◽  
Author(s):  
Gáspár Lukács ◽  
Alicja Grządziel ◽  
Marleen Kempkes ◽  
Ulrich Ansorge
Keyword(s):  
Task Performance ◽  
Visual Similarity ◽  
The Other ◽  
Trial Protocol ◽  
Concealed Information Test ◽  
Probe Task ◽  
Other Hand ◽  
Overall Efficiency ◽  
Concealed Information ◽  
Information Test

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.

scholarly journals Variation of picture angles and its effect on the Concealed Information Test

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Ann Hsu ◽  
Yu-Hui Lo ◽  
Shi-Chiang Ke ◽  
Lin Lin ◽  
Philip Tseng
Keyword(s):  
Concealed Information Test ◽  
Concealed Information ◽  
Information Test

scholarly journals Familiarity-based fillers improve the validity of reaction time-based memory detection

2016 ◽  
Author(s):  
Bruno Verschuere ◽  
Gáspár Lukács ◽  
Bennett Kleinberg
Keyword(s):  
Reaction Time ◽  
Real Life ◽  
Concealed Information Test ◽  
Test Protocol ◽  
Single Probe ◽  
Multiple Probe ◽  
Concealed Information ◽  
Information Test

The reaction time (RT)-based Concealed Information Test (CIT) allows for the detection of concealed knowledge (e.g., one’s true identity) when the questions are presented randomly (multiple-probe protocol), but its performance is much weaker when questions are presented in blocks (e.g., first question about surname, then about birthday; single-probe protocol). The latter test protocol, however, is the preferred and sometimes even the only feasible interviewing method in real-life. In a first, pre-registered, experiment (n = 363), we show that the validity of the single-probe protocol version can be substantially improved by including familiarity-related filler trials (e.g., “KNOWN,” “UNKNOWN”). We replicated these findings in a second, preregistered, experiment (n = 237), where we further found that the use of familiarity-related fillers even improved the classic multiple-probe protocol. We recommend the use of familiarity-related filler trials for the RT-based CIT.

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