Only true and fabricated baseline statements combined might improve lie, but not truth, detection.

Objectives: We tested the effect of true and fabricated baseline statements from the same sender on veracity judgments.

Hypotheses: We predicted that presenting a combination of true and fabricated baseline statements would improve truth and lie detection accuracy, while presenting a true baseline would improve only truth detection, and presenting a fabricated baseline would only improve lie detection compared with presenting no baseline statement.

Method: In a 4 × 2 within-subjects design, 142 student participants ( = 23.