Influence of noun imagery on speed of naming nouns

In an experiment on the influence of noun imagery on the speed of naming visually presented nouns, it was found that high-imagery nouns were named, on an average, 14 msec faster than low-imagery nouns. The difference, although small, was highly significant [F(l,14) = 10.04]. The magnitude of this effect was about one-third of that obtained when subjects were required to identify the grammaticality of phrases containing these same nouns, indicating that speed of encoding was probably a more important factor than speed of recognition in producing a noun imagery effect in speed of grammaticality judgments