Mustaq Khan

Date of Award


Degree Type


Degree Name

Doctor of Philosophy


The functional similarity of schematic and categorical organizations of knowledge was investigated by comparing schema importance effects with taxonomic frequency effects. Importance effects refer to better recall of important over unimportant events in schema-based text (descriptions of everyday activities), and taxonomic frequency effects refer to better recall of common over uncommon members of natural categories. Importance effects have been explained in terms of differences in the number of interconnections among elements in the schematic knowledge structure, whereas taxonomic frequency effects have been explained in terms of differences in strength of association between the category and its members. Recognition and recall experiments showed the two effects to be similar, and importance effects to be based primarily on strength of relation between an item and its schema name. These results suggested that schematic and categorical organizations are functionally similar. The results are consistent with association-based theories of memory that do not propose schematic organizations.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.