Subjects can name color words faster than they can name color patches.
To account for that effect, a generic model of naming is described wh
ich assumes that words access the mental lexicon directly, whereas col
or patches do so only indirectly via an initial imaginal or semantic r
epresentation. However, Lund (1927) reported that the naming advantage
for words disappeared when all the items to be named on a page were t
he same (i.e., they were blocked). In the present study, three experim
ents are reported that were designed to provide a clearer empirical de
finition of Lund's blocking effect and to ascertain the extent to whic
h it requires a modification of the generic model. The blocked lists h
ad 50 items arranged into 10 blocks, with each block homogeneous with
respect to color. The block lengths were either all a predictable leng
th of 5 items or they varied randomly from 1 to 9 items. The data indi
cated the following: (1) The blocking effect occurred even when the ta
sk required a full identification of each item, and (2) the blocking e
ffect was confined to within-block transitions. Blocking seemed to eli
minate the word advantage by allowing the subject to re-use the lexica
l entry used for the immediately prior item, which is consistent with
the generic model.