Recruitment of newly acquired category exemplars into unconscious processing systems is rapid and durable.

In a series of 3 unconscious priming experiments, we investigated if newly acquired English language words can become integrated into unconscious processing systems, and what preconditions are required to enable this process. In each experiment participants learned English language names of extremely rare fish and flowers in a single learning session. After a varying interval of time and in some cases a brief session of repeated conscious exposure (relearning), the newly learned words were presented as briefly flashed, visually masked primes in a standard unconscious category priming procedure. Results show that newly acquired words are recruited quickly into unconscious processing systems. Furthermore, this acquisition persists for at least 48 h and is dependent on prime duration. Since priming was only obtained after an interval that included overnight sleep, consolidation during sleep may play a role in the integration of novel words into unconscious processing systems.