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Test Delivery Software (Drivers) A test delivery driver is a fairly complicated software application that typically does more than simply present items to examinees and collect their responses The driver is partly an elaborate software user interface, combined with numerous behind-the-scenes data management capabilities and computational algorithms As noted previously, some drivers may even employ various real-time test assembly capabilities This test delivery driver software needs to perform as many as seven functions: (1) test initialization; (2) test navigation for the test taker; (3) item/task presentation; (4) response capturing; (5) real-time scoring; (6) timing; and (7) selection of subsequent test units To better understand these functions, it is important to rst introduce the concept of test units Most tests are comprised of up to four standard test units A test item or individual performance exercise is the smallest unit of presentation Second, items can also be grouped into sets or groups In some cases, the items in a set or group may share a common stimulus In other cases, the items may be grouped by a common content theme or for timing/security reasons (eg, each set must be submitted as it is completed, preventing examinees from subsequently changing answers) Third, any combination of discrete items and item sets/groups can be combined into a section, module, or testlet13 The fourth and most general test unit is the test form A test form can be a preconstructed collection of items or it can be constructed in real-time by the test delivery software For example, a CAT may generate a test form one item at a time by moving some of the ATA functionality into the test delivery driver (see the Test assembly and composition system section) At the end of a CAT, each test taker will have been administered his or her unique test form The test initialization process logs in the test taker and starts the test If an intact test form, section, or set is administered; the test delivery driver typically loads the items into a navigation list control, which orders the items according to a random or some prescribed scheme The primary function of the navigation control is to allow the test taker to move between items (or between test units) Some navigation controls only provide navigation between adjacent units (forward/backward, next/prior) Navigation controls may have an annotated listing of the items, including completion status of all of the available items in the current unit This type of explorerbased navigation allows the examinee to click on a particular item and jump directly to that item Under CAT, items can be added to the navigation control as they are selected The test developer decides whether backward navigation and the capability to change previous answers is allowed. vb.net barcode reader Read data from Barcode Reader using VB.NET - Experts Exchange
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