This article describes the evaluation of a 4-1/2-month multimedia traffic-safety campaign that targeted young drivers in northeastern Tennessee. Discussion groups with teenagers provided the basis for public-service announcements (TV, radio, and billboard), which were developed specifically for this intervention. To determine the impact on crash frequencies among drivers 16-19 years old, baseline, intervention, and follow-up crash data were obtained from statistics maintained by the state. A time-series analysis of these data indicated that during the intervention period, there was a 21.6% decrease in crashes for which 16-19-year-old drivers were at fault, whereas a control location in southeastern Tennessee exhibited no significant change.
____ Tri-Cities ---Intervention Site -----Hamilton County---Comparison Site
Pre-InterventionPost-Intervention Figure 2. Frequency of serious-injury crashes involving 16-19-year-old at-fault drivers between 1994 and 1999 occurring in Tri-Cities (treatment) and Hamilton County (comparison), Tennessee. Lines drawn through the data are best-fit, using least-squares linear regression.624 WHITTAM ET AL.
Although Web-based training has experienced significant increase in popularity recently, there is a paucity of empirical information on how these programs should be designed. Fundamental questions about basic design elements (e.g., user interface, quizzing strategies) are still to be answered. This study evaluated quiz distribution in a Web-based training program for a manufacturing organization. Results indicated that the trainees-shop supervisors with little to no prior computer experience-had a very positive reaction to the course and performed well on the final test. Furthermore, frequency of pop-up quizzes during the course had no effect on the test scores, time needed to take the course, or the trainees' reaction to the course. These results are discussed in terms of their implication for Web-based instructional design. 57 Ó 2004, Baywood Publishing Co., Inc.
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