Fig. 1

Item classification in the RT-CIT. Note Example items (as they would be displayed on a computer screen) and corresponding classification via keypresses for the Response-Time Concealed Information Test (RT-CIT), illustrated with a hypothetical murder case. The true murder weapon, in this case knife, serves as the probe, while four similar items, that are indistinguishable from the probe for naïve examinees, serve as irrelevants (e.g., here, one of these four is gun) and one additional irrelevant item serves as the target (here: rope). Irrelevants and probe have to be classified by the examinees with the same key (in this case, “E”), while the target requires a different response (in this case, “I”)