Studying a list of words associated to a critical nonpresented word re
sults in high rates of false recall and false recognition for that non
presented item (Roediger & McDermott, 1995). Two experiments examined
the effect of manipulating the number of associates presented on false
recall and later false recognition of a nonpresented item: In Experim
ent 1, associate lists of varying lengths were studied; in Experiment
2, list length was held constant and the number of associates within t
he list was manipulated. In both experiments, the rate of critical int
rusions in recall increased steadily with increasing number of associa
tes studied. Most notably, the filler words used in Experiment 2 to eq
uate the list lengths did not affect the rate of critical intrusions,
although they did depress recall of studied words. False recall and fa
lse recognition appear to be tied to the total, not the mean associati
ve strength of items in the list.