Overusing the pacifier during infancy sets a footprint on abstract words processing.

Perturbations to the speech articulators induced by frequently using an interfering object during infancy (i.e., pacifier) might shape children's language experience and the building of conceptual representations. Seventy-one typically developing third graders performed a semantic categorization task with abstract, concrete and emotional words. Children who used the pacifier for a more extended period were slower than the others. Moreover, overusing the pacifier increased response time of abstract words, whereas emotional and (above all) concrete words were less affected. Results support the view that abstract words are grounded both in perception-action and in linguistic experience.