This experiment measures retrieval time from semantic memory， and this paper explaines how a network representation of the propositions is created． Such representations reveal in graphical form the associative connections between concepts． The closer together the concepts in a propositional network are， the better cues they are for each other’s recall． The results of this experiment almost support the network of concepts assumed by Collins and Quillian（1969）in their experiment to compare reaction time in making true－false judgments about statements， but some do not． A hierarchy of concepts which they proposed can be rarely seen in this study．departmental bulletin pape
