Browsing by Author "Slaughter, Laura"
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Item Assessing users' subjective satisfaction with the Information System for Youth Services (ISYS)(1998-10-15) Slaughter, Laura; Norman, Kent L.; Shneiderman, BenIn this investigation, the Questionnaire for User Interaction Satisfaction (QUIS 5.5), a tool for assessing users' subjective satisfaction with specific aspects of the human/computer interface was used to assess the strengths and weaknesses of the Info rmation System for Youth Services (ISYS). ISYS is used by over 600 employees of the Maryland State Department of Juvenile Services (DJS) as a tracking device for juvenile offenders. Ratings and comments were collected from 254 DJS employees who use ISYS. The overall mean rating across all questions was 5.1 on a one to nine scale. The ten highest and lowest rated questions were identified. The QUIS allowed us to isolate subgroups which were compared with mean ratings from four measures of specific interfac e factors. The comments obtained from users provided suggestions, complaints and endorsements of the system. Also cross-referenced as CAR-TR-768Item Dual Navigation of Computerized Self-Administered Questionnaires and Organizational Records(2000-10-04) Norman, Kent L.; Slaughter, Laura; Friedman, Zachary; Norman, Kirk; Stevenson, RodThis research explored dual navigation between organizational records and a computerized self-administered questionnaire. Two alternative interface designs for on-line questionnaire presentation were investigated. The form-based version of the questionnaire was divided into sections by question topic and each section was displayed as a single web page. In the item-based version, each question item was displayed individually on the screen. The navigational data collected was used to examine how participants moved between the organizational records and the questionnaire items as they completed the computerized questionnaire. Along with the navigational data, responses from pre- and post- questionnaires were analyzed. There were no significant differences in terms of accuracy, completion time, and ratings given in the pre- and post- questionnaires. However, there were significantly different navigational patterns between the two groups. Respondents in the form-based group tended to answer questions in more of a non-linear sequence. Additionally, the item-based group had more organizational record to organizational record traversals while the form-based group had more questionnaire item to questionnaire item traversals. Keywords : Questionnaires, Surveys, User Interface, World Wide Web, CSAQ, Navigation, Break-Dancing (Also corss-referenced as HCIL-TR-2000-22) (Also cross-referenced as UMIACS-TR-2000-71)Item Facilitating Network Data Exploration with Query Previews: A Study of User Performance and Preference(1998-10-15) Tanin, Egemen; Lotem, Amnon; Haddadin, Ihab; Shneiderman, Ben; Plaisant, Catherine; Slaughter, LauraCurrent network data exploration systems which use command languages (e.g. SQL) or form fill-in interfaces fail to give users an indication of the distribution of data items. This leads many users to waste time posing queries which have zero-hit or mega-hit result sets. Query previewing is a novel visual approach for browsing huge networked information warehouses. Query previews supply data distribution information about the database that is being searched and give continuous feedback about the size of the result set for the query as it is being formed. Our within-subjects empirical comparison studied 12 subjects using a form fill-in interface with and without query previews. We found statistically significant differences showing that query previews sped up performance 1.6 to 2.1 times and led to higher subjective satisfaction. (Also cross-referenced as UMIACS-98-14)