200 words were read to 100 Ss at a 10-sec. rate. For each word S decided whether it had or had not been read earlier. Critical stimulus words were inserted in the list, these words being presumed to elicit specified implicit responses. Later in the list the assumed implicit response words were presented. For these latter words for 3 of 5 classes of words, false recognition was much higher than for control words. The greater the prior frequency of elicitation of the implicit response the greater the likelihood of false recognition. (PsycINFO Database Record (c) 2006 APA, all rights reserved)