Effects of Varying Numbers of Probes on RT-based CIT Accuracy

Eom, Jin-Sup; Sohn, Sunju; Park, Kwang-bai; Eum, Young-Ji; Sohn, Jin-Hun

doi:10.14257/ijmue.2016.11.2.23

Cited by 12 publications

(13 citation statements)

References 23 publications

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“…Diagnostic accuracy was modest for the single-probe without fillers CIT protocol, and very good for both the single-probe with fillers CIT protocol and the multiple-probe CIT protocol. Using DeLong's test for the statistical comparison of two AUC values (DeLong, DeLong, & Clarke-Pearson, 1988;Robin et al, 2011), we found that the AUC for the single-probe without fillers CIT protocol was significantly lower than that of the multiple-probe without fillers CIT protocol, D(282.47) = 9.40, p < .001. Likewise, the AUC value for the single-probe with fillers CIT protocol was larger than that of the single-probe without fillers CIT protocol, D(224.82) = 12.34, p < .001, and larger than that of the multiple-probe without fillers CIT protocol, D(204.99) = 2.27, p = .024.…”

Section: Resultsmentioning

confidence: 97%

Familiarity-related fillers improve the validity of reaction time-based memory detection.

Lukács¹,

Kleinberg²,

Verschuere³

2017

Journal of Applied Research in Memory and Cognition

164

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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, preregistered, experiment (n = 363), we show that the validity of the single-probe protocol version can be substantially improved by including familiarity-related fillers: stimuli related to either familiarity (e.g., the word "FAMILIAR,") or unfamiliarity (e.g., the word "UNFAMILIAR"). We replicated these findings in a second, preregistered, experiment (n = 237), where we further found that the use of familiarityrelated 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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Section: Resultsmentioning

confidence: 97%

Familiarity-related fillers improve the validity of reaction time-based memory detection.

Lukács¹,

Kleinberg²,

Verschuere³

2017

Journal of Applied Research in Memory and Cognition

164

View full text Add to dashboard Cite

show abstract

“…Therefore, in respect of the number of different items, the MP protocol with its multiple items in each block (in particular: three targets) is in fact more comparable to the Inducer-CIT. Furthermore, it has been repeatedly shown that the MP protocol clearly outperforms the SP protocol in the (RT-based) Target-CIT (Eom, Sohn, Park, Eum, & Sohn, 2016;Lukács, Kleinberg, et al, 2017;. Therefore, from the practical perspective, the future use of the suboptimal SP Target-CIT seems unlikely.…”

Section: Discussionmentioning

confidence: 99%

Information Leakage in the Response Time‐Based Concealed Information Test

Lukács¹,

Ansorge²

2019

Preprint

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The Response Time‐Based Concealed Information Test (RT‐CIT) can reveal when a person recognizes a relevant (probe) item among other, irrelevant items, based on comparatively slower responses to the probe item. For example, if a person is concealing his or her true identity, one can use the suspected identity details as probes, and other, random details as irrelevants. However, in our study, we show that even when participants are merely informed about such probes (i.e., the relevant identity details) before performing the RT‐CIT, their responses will also be slower to these details. Hence, it is more difficult to distinguish such innocent but pre‐informed persons from actually guilty persons. At the same time, we introduce a CIT version with familiarity‐related inducer stimuli, but with no targets, that elicits probe‐minus‐irrelevant RT differences only among guilty participants but not among informed innocent participants. Implications for the theory and the application of CITs are discussed.

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“…have shown that substantially better accuracies can be obtained using a multiple-probe protocol, i.e., several item types randomly intermixed within the same task (e.g., names, birthdates, nationalities, etc. ; see also Eom, Sohn, Park, Eum, & Sohn, 2016). For one, it is quite possible that the A-CIT could also be improved with the inclusion of several item types.…”

Section: Discussionmentioning

confidence: 99%

Association-based Concealed Information Test: A Novel Reaction Time-Based Deception Detection Method

Lukács¹,

Gula²,

Szegedi-Hallgató³

et al. 2019

Preprint

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In recent years, numerous studies were published on the reaction time (RT)-based Concealed Information Test (CIT). However, an important limitation of the CIT is the reliance on the recognition of the probe item, and therefore the limited applicability when an innocent person is aware of this item. In the present paper, we introduce an RT-based CIT that is based on item-category associations: the Association-based Concealed Information Test (A-CIT). Using the participants’ given names as probe items and self-referring “inducer” items (e.g., “MINE” or “ME”) that establish an association between ownership and responses choices, in Experiment 1 (within-subject design; n = 27), this method differentiated with high accuracy between guilty and innocent conditions. Experiment 2 (n = 25) replicated Experiment 1, except that the participants were informed of the probe item in the innocent condition—nonetheless, the accuracy rate remained high. Implications and future possibilities are discussed.

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Effects of Varying Numbers of Probes on RT-based CIT Accuracy

Cited by 12 publications

References 23 publications

Familiarity-related fillers improve the validity of reaction time-based memory detection.

Familiarity-related fillers improve the validity of reaction time-based memory detection.

Information Leakage in the Response Time‐Based Concealed Information Test

Association-based Concealed Information Test: A Novel Reaction Time-Based Deception Detection Method

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