Term selection process in subject searching: End-user interactions with information retrieval systems and indexing languages

End-user interactions with the information retrieval system (library catalog) during subject searching and their interaction with the indexing language information, their understanding of this information and its function in term selection. Participants include graduate students of a large research university with real information needs. Data were collected using qualitative data collection methods and were analyzed using qualitative analysis methods.; A model of end-user interactions was developed based on data analysis that identifies initial query, main interaction, and stopping as its top elements. Term selection and choice of search option for the initial query are discussed. Searcher behaviors, cognitive processes, expectations, and interaction with the various components of the information retrieval system during the main interaction are identified and described. Decisions on how to proceed are the main element of the Stopping stage of end-user interactions with the information retrieval system.; Participants were asked to interact with the indexing language (Library of Congress Subject Headings) and were asked to express their general understanding of the information provided and each specific type of information included in the indexing language. In addition, participants were asked to express their understanding of the function of indexing language information in term selection, its usefulness and desirability as an integrated tool into the information retrieval system during subject searching. Study findings and their implications are discussed and future research is considered.