Cognitive control outside of conscious awareness

- Cognitive control can be triggered unconsciously.
- Here we studied whether cognitive control can operate on subliminal information.
- Subliminal primes produced conflict adaptation and negative priming on visible probes.
- These effects suggest a transfer of cognitive control from the prime to the probe.
- Cognitive control can resolve conflict between subliminal information.

To test whether cognitive control can operate fully unconsciously on conflicts arising between two interfering subliminal stimuli, we designed a priming paradigm in which a subliminal reverse Color-Word Stroop item (a color word written on a congruent/incongruent color rectangle) preceded a supraliminal one in each trial. We found (a) a conflict adaptation effect, with a smaller reverse Stroop effect on the visible probe items after incongruent than after congruent subliminal prime items and (b) a negative priming effect, with longer reaction-times on incongruent visible probe items when the color word corresponded to the color of the rectangle in the preceding subliminal prime item than when it was not. These effects replicate the ones classically reported in studies using visible items and suggest that cognitive control was transferred from the subliminal prime to the visible probe items. Taken together, our results demonstrate that cognitive control can operate on conflicting subliminal information.