A study was conducted to test a model that conceives of long term memory as a propositional network of ideas made up of knowledge clusters and related subclusters. After two pilot studies suggested that recall order of ideas was unrelated to organization, the study investigated whether units of main and supporting ideas produced during organization cohered during recall. Subjects were 18 college undergraduates randomly assigned to two equal groups. On the first day of the experiment, all subjects generated 20 ideas on how college differs from high school. Subjects in one group then outlined their ideas in sequence using two orders, main ideas and supporting ideas; subjects in the other group were asked to write a text from the ideas they had generated. Twenty-four hours later all subjects were instructed to number their papers from 1 to 20 and to recall their original ideas. Analysis of the data once again indicated that recall order was unrelated to both generation and organization order. Major ideas were recalled more frequently than supporting ideas for both groups of subjects, and those who wrote texts recalled more ideas in all. These results are consistent with the cluster hypotheses of the model under investigation. (JL)