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Computer-based assessment

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Computer-based assessment

In its broadest sense, e-assessment is the use of information technology for any assessment-related activity. This definition embraces a wide range of student activity ranging from the use of a word processor to on-screen testing. Due to its obvious similarity to e-learning, the term e-assessment is becoming widely used as a generic term to describe the use of computers within the assessment process. Specific types of e-assessment include computerized adaptive testing and computerized classification testing.

E-assessment can be used to assess cognitive and practical abilities. Cognitive abilities are assessed using e-testing software, while practical abilities are assessed using e-portfolios or simulation software.

Components

An e-testing system designed to focus on lower level associations comprises two components: (1) an assessment engine; and (2) an item bank. An assessment engine comprises the hardware and software required to create and deliver a test. Most e-testing engines run on standard hardware so the key characteristic is the software's functionality. There is a wide range of software packages. The software does not include the questions themselves; these are provided by an item bank. Once created, the engine uses the item bank to generate a test. Traditional paper-and-pencil testing is similar, but the test is pulled from the bank at only one time, when it is sent to publishing.

The creation of the item bank is more costly and time consuming than the installation and configuration of the assessment engine. This is due to the fact that assessment engines can be bought "off the shelf," whereas an item bank must be developed for each specific application.

An e-assessment system designed to focus on more sophisticated forms of knowledge requires some sort of interactive activity and a system for inviting students to reason or solve problems around that activity. One influential program of research is known as Evidence Centered Design, or ECD. ECD involves the use of Bayesian Inference Nets to create a sophisticated model of student cognition, and a set of activities or problems that students work on that allow the system to estimate the individuals understanding of the particular domain.

Advantages

E-assessment is becoming widely used. It has many advantages over traditional (paper-based) assessment. The advantages include:

  1. lower long-term costs
  2. instant feedback to students
  3. greater flexibility with respect to location and timing
  4. improved reliability (machine marking is much more reliable than human marking)
  5. improved impartiality (machine marking does not 'know' the students so does not favour nor make allowances for minor errors)
  6. greater storage efficiency - tens of thousands of answer scripts can be stored on a server compared to the physical space required for paper scripts
  7. enhanced question styles which incorporate interactivity and multimedia.

There are also disadvantages. E-assessment systems are expensive to establish and not suitable for every type of assessment (such as extended response questions). The main expense is not technical; it is the cost of producing high quality assessment items - although that cost is identical when using paper-based assessment.

The best examples follow a eleven plus exam set

E-assessment standards

In order to create a mechanism for the sharing of high quality assessment items, global standards have emerged. The IMS Question and Test Interoperability specification (QTI) provides a common format for describing and distributing question items across disparate systems.

Hand-held student response systems

An area of E-assessment that has seen extensive growth in recent years is the use of hand held student response devices (often referred to as interactive whiteboard.

Note on terminology

Various terms are used to describe the use of a computer for assessment purposes. These include:

  1. Computer-Assisted Assessment or Computer-Aided Assessment (CAA)
  2. Computer-Mediated Assessment (CMA)
  3. Computer-Based Assessment (CBA)
  4. online assessment.

Although these terms are commonly used interchangeably, they have distinct meanings.

Computer Assisted/Mediated Assessment refers to any application of computers within the assessment process; the role of the computer may be extrinsic or intrinsic. It is, therefore, a synonym for e-assessment which also describes a wide range of computer-related activities. Within this definition the computer often plays no part in the actual assessment of responses but merely facilitates the capture and transfer of responses between candidate and human assessor.

Computer-Based Assessment refers to assessment which is built around the use of a computer; the use of a computer is always intrinsic to this type of assessment. This can relate to assessment of IT practical skills or more commonly the on screen presentation of knowledge tests. The defining factor is that the computer is marking or assessing the responses provided from candidates. It can be performed on an equivalent electronic device such as a cell phone or PDA. CBA systems enable educators and trainers to author, schedule, deliver, and report on surveys, quizzes, tests and exams.[2] They may be a stand-alone system or a part of a virtual learning environment, possibly accessed via the World Wide Web.

Online assessment refers to assessment activity which requires the use of the internet. In reality, few high stakes assessment sessions are actually conducted online in real-time, but the transfer of data prior to and after the assessment session is conducted via the internet. There are many examples of practice and diagnostic tests being run real time over the internet.

See also

References

External links

  • The e-Assessment Association is a professional body for e-Assessment.
  • International Annual Conference on e-Assessment.
  • Transforming Assessment has a rage of examples of e-assessment in web 2.0 and virtual world learning environments (Based at the University of Adelaide, Australia)
  • e-assessment section at JISC, UK.
  • CAA Centre still offers the most to-the-point treatment of Computer-Based testing for use in Higher Education.
  • eAssessment at the Open University, UK shows how to use an opensource computer-assisted assessment (CAA) system called OpenMark designed to mark less structured questions.
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