Abstract
Recent studies have shown that subliminal priming effects can be of a semantic nature. However, the question remains how strong this kind of priming will prove to be. In the present study we investigated whether truly semantic unconscious priming only occurs for prime-target pairs that are strongly semantically related (e.g., cat-DOG) or whether priming effects can also be observed for pairs that are less semantically related (e.g., ant-DOG). A typical masked priming paradigm, with word primes and picture targets, was used and the relatedness between prime and target was manipulated. The results showed that prime-target relatedness significantly moderated the effects. A priming effect was only found for the strongly related prime-target pairs. This indicates that semantic subliminal priming requires a sufficient amount of semantic relatedness between prime and target, rendering it as sensitive to this semantic factor as supraliminal priming.