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- W325800367 abstract "'Dovetailing Chunks': A Technique for Optimizing Interactive Videodisc Design The cost of including an interactive videodisc in an instructional system can be high. The designer of the contents of the videodisc should therefore attempt to gain as much interactive leverage as possible from those materials. One way to do this is to approach the initial stages of the design process with a particular mind-set involving a technique I call dovetailing chunks. One approach to interactive videodisc technology is to view the design and developments process from the perspective of the structure of the disc's content. In other words, the starting point is to determine the content and layout of the videodisc based on an appropriate instructional design model. This is not to say that the crucial steps of needs and task analyses should be overlooked. On the contrary, the suggestion here is that these early activities should be carried out with the final structure of the laserdisc in mind. The idiosyncrasies of the videodisc require attention and consideration at a very early stage. The content of the videodisc (both video and auditory) can only become more than the sum of its parts if a particular mind-set is applied by those who determine the instructional content. One of the primary concerns, both economical and pedagogical, will be how to maximize the amount of time students can spend with different combinations of the instructional material through innovative laying down of instructional stimuli. Cost consideratios may, in some cases, dictate that the entire content must reside on a single-sided disc. If this were the case, then a 30-minute CAV laserdisc would hve to be set up in such a way that many hours of effective interaction could be generated. I would argue that greater utility (though not necessarily greater effectiveness) will be made of any videodisc component in an instructional system if the idea of dovetailing chunks is employed. Two Models for Design Recently, researchers and proponents of educationsl technologies have indicated that the effectiveness of interactive videodisc will be demonstrated not by comparative research models but rather by selecting and building upon appropriate causal models. Two such models lend themselves to providing a framework for the videodisc designer whose responsibility is to take stock of the materials that will comprise the instructional content and to decide in what fashion those materials will appear on the videodisc. The first, the instructional events model, is made up of nine critical events of instruction of which one, presenting stimuli with distinctive features, holds much import for our designer. The second, the computer-based instruction model, cites three types of CBI (drill-and-practice, tutorial and simulation). It takes as given that the first two can be effective with only computer-generated visuals and sound, but that the third requires a medium that possesses high-quality video and audio capabilities. A mix of these two models, couples with the technique of dovetailing chunks, can result in powerful and flexible instructional systems. In addition to the use of a mix of these two models as a foundation for an interactive videodisc system, certain important video considerations particular to this medium should be included. Because of its random accessibility and still-frame capabilities, the organization of an interactive videodisc should differ from that of a linear tape. Also, the pace of the video motion sequences should be faster because of the way interactive video systems segment knowledge into parts, the lack of necessary transitions and the ability to leave out details that can be put into still frames. In a similar vein, Hannafin has categorized a number of representative articles that address topics that can be slotted into five generic instructional phases. The second of these phases, presentation, focuses on the presentation variables of instructional systems. …" @default.
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- W325800367 title "'Dovetailing Chunks': A Technique for Optimizing Interactive Videodisc Design." @default.
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