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Analytical Survey of information and communication technology in special education

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 Foundations

Analytical Survey of information and communication technology in special education

Promotion of education is a fundamental objective of UNESCO. By definition (UN 1981), people with disabilities are often restricted in the extent to which they can take a full part in the society in which they live, but many of those restrictions can be reduced by their receiving good education.

The most important educational resource is people – teachers. However, it has to be recognized that in the present and the foreseeable future, economic and political restrictions are unlikely to be such that adequate supplies of suitably trained teachers will be available to completely fill the need for them. Apart from other restrictions, education is a self-sustaining process; to have a good supply of teachers tomorrow we must be educating numbers of children today. The availability of teachers trained in the speciality of teaching children with disabilities is even lower.

When human resources are inadequate, it is often easier to procure and provide technological solutions and it is most fortunate that in special education, technology can play a highly beneficial role. Although economic restrictions can affect access to technology, it can represent a good investment.

Objectives

This document outlines the role that information and communication technology (ICT) can achieve in special education, with the objective of getting it more widely adopted and used in UNESCO Member States.

Some writers refer to information and communication technologies in the plural (i.e. ICTs).  However, since the trend is towards the convergence of the technologies, it seems appropriate to refer to them in the singular; in time it will be too difficult to separate the communications components from other aspects of the technology, so they might as well be treated as one.

Fundamental assumptions

Technology is no substitute for human teachers – but can be a most valuable tool to supplement their contribution.

ICT is rapidly expanding and developing. Any description herein would inevitably be a ‘snap shot’ of the situation at the current time, one that would be out of date before the report is even published. Therefore, individual technologies are not described in any detail. Furthermore, it is recognized that technology ages rapidly. This implies that what is available today in technologically advanced states is not available in the less developed ones, but by the same token, that technology will be available in those states tomorrow. To reach the widest level of adoption we must not aim at the state of the art.

By the same token, there is no point in trying to be specific in this report about the state of the technology. It is better to discuss in broad terms the capabilities of the technology and to encourage the reader to pursue more timely sources of information with regard to specific products and facilities.

The acquisition and use of ICT must be placed in an appropriate context. An increased reliance on ICT can only benefit those who have access to it. In other words, there is a real danger that exclusion (for whatever reason: economic, physical, social, or whatever) will constitute a handicap (see the definition below). Furthermore, it is likely that many of those who will be excluded will be the same people who are already disadvantaged. Efforts must be expended on preventing the creation of an excluded underclass, but those efforts must be co-ordinated and appropriate; for instance, there is no point introducing electronic technologies to communities which lack electricity power supplies or which are confronting more fundamental needs – such as food and shelter.

It must also be recognized that educational systems vary between countries. In the particular context of Special Education, an important dimension is that of integration versus separation. That is to say that many countries are attempting as far as possible to educate all children in the same institutions, regardless of disability status, whereas other systems prefer to teach children in separate, special schools (which are often residential). Clearly the form of education will be different in these various institutions – as will the role of technology.

This report has been written to be concise, rather than comprehensive. It is assumed that the target readers have little time to read through a long document. For anyone requiring more details, a bibliography is provided at the end.

Definitions

4.1.      Impairment, disability and handicap

The World Health Organization (WHO) is in the process of creating new classifications and definitions of disability in terms of impairments, activities and participation (WHO, 1997), but for the purposes of this document, it is adequate to refer to the existing definitions, as presented in UN (1981).

Impairment

Any loss or abnormality of psychological, physiological or anatomical structure or function.

Disability

Any restriction or lack (resulting from an impairment) of ability to perform an activity in the manner or within the range considered normal for a human being.

Handicap

A disadvantage for a given individual, resulting from an impairment or disability, that limits or prevents the fulfilment of a role (depending on age, sex and social and cultural factors) for that individual.

No attempt is made herein to list disabilities. It is impossible to be definitive, particularly given the fact that handicap is socially and culturally dependent.

Special Education is that sector which deals with the education of all people identified as being disabled. The objective of all education is to enable the student to take a fuller part in society. So, according to the above definitions, the effects of a good education should be to reduce the handicapping effect of the disability.

The educational needs of people with disabilities are vastly diverse. They have the same needs as everybody else to learn the basic skills of literacy and numeracy to the best of their ability as well as other abilities that are required in the society in which they live. At the same time, they have (by definition), educational needs that others do not have. (Often referred to as special educational needs).

For some students these needs are concerned with access to education and materials; a blind student cannot use printed materials and must have non-visual alternatives. For others, the needs may be educational in themselves. That is to say, for example, that a cognitive impairment may inhibit the student’s ability to learn, such that they need to be taught in a different manner from students without that impairment. Also the needs of some students will be more fundamental and lower-level. For example, it may be that their education has to include areas that most children master at home before they ever commence formal education.

4.2.      The role of ICT

Information is a fundamental commodity. It is through the discovery of new information, its dissemination and sharing that society advances. Fundamentally information is not modality-specific (i.e. not tied to its form of presentation, be it visually, as sounds or whatever). Information may be defined as the characteristics of the output of a process. These characteristics enhance knowledge, being informative about the process and its input. Hierarchies of processes, linked together, provide a communication channel between each of the corresponding functions and layers in the hierarchies. But the end user (destination, addressee) for whom the information exists, is a person who is trained to manipulate through modality-specific notions (which are formed by percepts). Therefore, within ‘information technology’ modal aspect of information maybe more essential for development of relations between person and computer.

Education is concerned with the imparting of information – not just the simple acquisition of declarative facts, but also procedural information such as how to do things, even how to learn. Technology to aid in the processing and communication of Let us leave it to the philosophers to argue whether information can be created. Is all information in some sense ‘out there’ waiting to be discovered and codified, or can the truly creative mind spawn information that is unique and novel? 

information is not new; it is at least as old as writing. However, in the past 50 years, the development of that technology has accelerated exponentially, mainly due to the invention of digital electronics.

A vital recent development has been the convergence of technology concerned mainly with the processing of information with that which deals mainly with its communication. This is clearly seen in the emergence of the Internet, whereby the processing power in each office and school can (easily) be connected and communicate with corresponding systems anywhere else in the world. The better this integration is realized, the more blurred the distinctions become. We can reach the point where the user does not know whether the information resource being accessed is held on the local machine – and (more significantly) does not care where it comes from. This convergence is what is referred to as information and communication technology or ICT.

One of the difficulties of special education is that it requires special facilities and skills. These may be hard to find and expensive. At the same time, the number of children needing them within any group, may be relatively small. Again, ICT may have a role to play in disseminating and sharing special forms of education.

It should not be forgotten that ICT is part of the curriculum in all developed countries. The very ubiquity of ICT in society means that to not be educated in its use could itself be a handicap. Thus, though the emphasis in this paper is on use of ICT in education, it should not be forgotten that students with disabilities should also be educated regarding the technology itself. There is some disagreement as to the appropriate description for this discipline. ‘Computer literacy’ is a generally accepted term. Reading literacy implies the basic ability to read – and not necessarily a facility at reading. Therefore, to some people the analogy is that computer literacy would imply only an elementary familiarity with the technology, whereas what is required is a fluent facility with it.

Another role for technology is in assessment. People change and develop. Some impairments are progressive, but beyond such a ‘medical’ view, people change in reaction to their education and other changes in their environment. It is important therefore that assessments should be carried out regularly and these can be assisted by the use of technology.

In this context it is inevitable that the technology should be applied to education. Furthermore, it has particular strengths in educating people with disabilities, as discussed in the following section.

ICT in Special Education: An intermediary role

5.1.      Prosthetic uses

Many forms of disability affect learners’ ability to access standard educational materials and ICT can surmount some of these barriers.

5.1.1.   Access to text

The key to many uses of ICT is the availability of data in a machine-readable form. This is most malleable and capable of being transformed into different formats. Printed text is not accessible to people with a number of impairments, but if the same material is available as a computer file then it can be presented in any one of a number of ways (including enhanced printed forms, such as large-print text).

Conditions that affect text access:

•    blindness;

•    partial sight;

•    dyslexia;

•    illiteracy.

Most text is of a literary form, which is to say that it is composed of the alphanumeric characters that are found in the ASCII code set. However, a significant amount of text is written in special notations (beyond the scope of ASCII). Most notable among these are mathematics and music. Technology is less well developed for handing and transforming these notations.

5.1.2.   Graphics

Pictorial forms of information can take a vast range of forms from simple line diagrams to rich paintings. They differ in form and purpose and correspondingly means of accessing them vary. The same conditions, which affect access to text, also apply to graphical visual presentations. Though there are no recognized conditions equivalent to dyslexia or illiteracy with regard to pictures, it is clear that some people are better at mentally processing and understanding them than others.

As special case of access to graphics is the graphical user interface (GUI) as found on all modern computers. The interface consists of graphical items, such as windows, icons and menus as well as text, and their interpretation is a complex visual task. Thus, the advent of the graphical user interface led to significant fears of blind people being excluded from computer use. However, efforts put into addressing that problem have paid off and a number of ‘screen reader’ programs are commercially available which give good access to these interfaces.

As well as needing to read and appreciate graphics, it can be important to be able to create them. Drawing programs can make it possible for many people to generate good quality pictures and in some cases they may make it possible for people to create pictures who could not using conventional materials (notably blind people).

5.1.3.   Writing

Some students lack the physical ability to write. There are a number of alternatives that can be applied. Some are able to use a standard keyboard and to type

There can be some debate as to whether illiteracy is a disability; one of the major objectives of education is to impart literacy. However, there are cases in which a student has a cognitive impairment which makes learning to read difficult or impossible.

instead of hand writing. For those who may have restricted dexterity, tools exist which can speed up their input by reducing the number of key presses required, by anticipating subsequent keypresses. Other people who lack the dexterity to type may be able to wordprocess nevertheless by some form of keyboard emulation such that they generate input on some other device, which is fed into the computer as if it came from a keyboard.

There is a wide range of such devices available. The lowest level of input is a single switch, which might be used by someone with severe physical impairments, such as a tetraplegic. A switch would be operated by a part of the body, which might be: a hand, foot, eye blinks,  breathing (through a ‘sip and puff’ switch), the head – or whatever part of their body they have sufficient control over. Although simple, this form of input is also very slow. Different techniques have been developed for the interpretation of single-switch input. One such method is Morse code, which has the advantage of being long-established, and has even been taught in mainstream education in some countries. Morse is quite difficult to learn and remember, though, and some people chose instead to use scanning, menu-based systems, which involve less learning and memorization. A number of approaches exist which will maximize the amount of information extracted from each switch press.

At the other end of the spectrum some keyboard alternatives provide a high rate of input. Notable among these is speech input. Current software can provide a good level of recognition of speech at conversational speeds. There are some features to note though. First, current speech recognizers are speaker-dependent and require training. Secondly, although recognition levels are high, anything less than 100% can still be inefficient in some real applications. Finally, English is the predominant language for current systems. With time, we can expect improvements in all these aspects.

There are other people who have no difficulty with the physical process of writing, but do have problems with composition. The largest such group are those with forms of dyslexia which affect writing, but there are also others who have different degrees of language impairment, perhaps due to brain damage (possibly caused by trauma or stroke). A variety of tools exist to assist such people. Modern word processors often have tools such as spelling checkers, grammar checkers and outliners built in but there are also specialist tools that will help with composition.

5.1.4.   Speaking and face-to-face communication

Some people cannot communicate in speech. This may be due to an inability to physically generate the sounds of speech or it may be due to some language processing deficit. Clearly this is a handicap in most daily activities, but will clearly have a particular effect on education.

A wide range of alternative and augmentative communication (AAC) devices exist. They employ a range of input strategies, aimed to suit the abilities of different users. Output may be in a written form, but most often they produce synthetic speech, which is perhaps natural as it is speech that they are intended to replace. The quality of the speech generated is most important and is constantly improving. In spite of the fact that English (and particularly American English) has received the most attention,

synthesizers for other languages are available and are constantly improving. Sign languages are languages in their own right, but they tend to be used only by people who need to use them. In other words, many deaf people learn sign, but not many hearing people do. Also, there are a variety of sign languages, and they are distinct from the spoken languages used in the same countries, so that, for example, American Sign Language is quite different to British Sign Language even though the spoken language is the same in those countries. All these factors can contribute to the isolation of deaf people from the rest of the community. For those who would prefer not to be so isolated, technology may have a role to play. As yet, sign language interpretation and translation is somewhat limited, but again it is probably only a matter of time before adequate translation (such as sign to speech) is available.

There are a number of other possible uses of ICT in relation to sign language. It has to be remembered that to many deaf people, sign is their first language, and they can have difficulties with spoken and written language. Sign may be presented through technology, so that an animated figure on a screen might sign a message in place of text or speech. Also, sign is by nature dynamic, so that dictionaries of sign with animation on a computer screen are much richer than books with static pictures.

5.1.5.   Other therapeutic applications

The flexibility of ICT and the variety of input and output forms that can be handled, creates possibilities for therapeutic uses. For instance, speech inputs can be processed and displayed visually to help deaf students improve the quality of their speech. Another example is that gesture-based input has been used as the basis of physical therapy (Wong 1991; Pausch and Williams 1995). 

Educational uses

Computer programs can be used to teach directly to students. They have a number of benefits. They offer a form of individual attention to the learner. A program is infinitely ‘patient’ and can present a lesson or idea repeatedly and consistently without variation or fatigue. That is particularly useful in drill-and-practice lessons, where repetition is necessary in order for a concept or skill to be learned. This can be most useful for children with learning disabilities.

It is important in computer-aided learning that a machine cannot be judgmental. Children with learning disabilities are accustomed to failing and will often adopt strategies such that they can avoid situations in which there is a danger they may fail again. They avoid the risk of failure. However, when interacting with a machine there is not the danger of annoying or upsetting another person, no matter how many mistakes one makes.

Much of the educational software currently available is based on a playful, games-style approach. There is relatively little that is designed specifically for children with learning or other disabilities, but it is often possible to use software targeted at one

A number of different terms are used to describe this field, including Computer-Assisted Learning, Computer-Aided Learning (both abbreviated to CAL) and Computer-Based Learning (CBL)

group with others. The increasing availability of multimedia forms of interaction is important, too. For example, pre-literate students may be taught to read with the aid of programs that will produce speech.

Almost all the other features of ICT mentioned in this report can have a relevance to direct educational use of the computer. For instance networks and communications can mean that educational programs can be delivered at a distance. Similarly, the flexibility of input and output channels that are available can be important. An example would be a child using a simplified form of input such as a touch-sensitive pad, rather than a keyboard. Thus lessons on handling money might be taught through pressing real coins on a touchpad, to someone who would not be able to type arithmetic sums on a keyboard.

There are reasons to believe that one particular group of students with special needs can benefit from computer-based learning, and that is those who are autistic. Autism is mainly a social handicap, characterized by difficulties in relationships with other people and one suggestion is that such people have less difficulty forming a ‘relationship’ with a machine. Furthermore, regularity and predictability are important to autistic people and computers are, by nature, consistent and logical.

An­ important example is the use of everyday computer tools, especially word processors. As discussed elsewhere, the word processor may be used prosthetically as a writing aid for someone who cannot write manually. It can also be used, though, by someone who can write – but not very well. The motivational effect of being able to produce a piece of written work which is neat and correct and printed with high quality, can be significant, and with the facilities of editing, correcting and printing this is possible for anyone.

Motivation is also apparent in that children often greatly enjoy interacting with computers. Some programs – notably games – are specifically designed to enhance motivation (Malone 1982), but even with more mundane programs seem to capture children’s attention and make them concentrate for longer than they find possible for other activities.

As has been stressed elsewhere, technology can never be a substitute for the human teacher. It is in the area of educational software that it is most tempting to try to make that substitution, but in general it is best to see software as a tool that the teacher can choose to use. The best software should be intelligent. That is to say that it should incorporate a student model, a representation of the individual student.

5.3.      Communication at a distance

ICT can be used as part of distance teaching. This can be important when (specialized) teachers are in short supply and have to be shared between geographically dispersed students and teachers. Communication can take place in different modes and requires different rates of information flow (bandwidth). These are all summarized in Table 1.

 

Synchronous/ Asynchronous

Bandwidth (High, Medium, Low)

Direction (1-way or 2-way)

Dispersion (1-to-1, 1-to-many, many-to-many)

Video conferencing

S

H

2

m-m

Video broadcast

A

H

1

1-m

Audio broadcast (radio)

A

M

1

1-m

Webcast

A

M

1

1-m

Telephone

S

M

2

1-1

Telephone conferencing

S

M

2

m-m

Web pages

A

H/L

1

1-m

Chat

S

L

2

m-m

Email

A

L

2

1-1

Bulletin board

A

L

1

1-m

Newsgroups

A

L

1

1-m



[1]        Synchronous also implies real-time.

[2]        Most communication can be made to be 2-way, but some is inherently more conversational. For instance a note in a newsgroup may generate a follow-up article, but nevertheless the original note was essentially a one-way communication from the poster.

[3]        Many-to-many also implies the possibility of 1-to-1 and 1-to-many.

[4]        Web pages may contain high bandwidth material such as video clips or low bandwidth, if they are simply text.

Table 1. Summary of communication styles

The different styles of communication have different characteristics in terms of teaching objectives. For example, to demonstrate a physical action, a synchronous (real-time) connection (presumably a video link) is required, whereas the imparting of factual information can be achieved by a low-bandwidth, asynchronous channel, such as email.

There is effectively a simple relationship between bandwidth and cost: the greater the bandwidth the greater the cost. So, while video conferencing may offer the broadest possibilities for communication, it may be too expensive, or the infrastructure to support it may not be available. At the same time, advancing development implies that bandwidth is constantly becoming cheaper. In technologically advanced countries, demand for bandwidth is always slightly in advance of its availability (we always want more) and in less developed countries the bandwidth available is less than the current state of the art.

ICT can also form a useful communication medium between people with different sensory abilities. Coombs, (1995) shows how a blind teacher may be able to communicate with a deaf student despite their mis-match of abilities thanks to email . While email is normally used for communication between distant locations, it can also be used as a means to local, face-to-face communication.

The world-wide web is a particular form of communication. It has rapidly gained in importance such that it is almost becoming an essential information source, not the least in education. The implication is that exclusion from access to the web for any reason may become a handicap. There are a number of possible causes of exclusion, probably the greatest of which is economics – simply not being able to afford the equipment and connections. The same physical and sensory disabilities that can affect any access to computers can also hinder use of the web. Efforts are being expended on ensuring that material on the web is accessible and that there are tools that facilitated that access.

Implementation

There are a number of points that have to be considered if the introduction and maintenance of ICT in Special Education is to be successful.

Probably the most important is the need to train teachers well. While it may often seem hard to acquire the equipment, there is no point in doing that if it is going to lie neglected and unused, and it will only be adopted if the people who might use it are confident in its use and convinced of its usefulness.

There is also a need for support staff. While a well trained teacher should be capable of diagnosing and repairing faults, that is not the best use of a teacher’s time and technical backup should be available. Equipment must be maintained and repaired.

Constant monitoring at all levels is also vital. This applies to programmes of ICT use, so that the job is not over when the equipment has been obtained and the teachers have been trained. They should not be simply left ‘to get on with it’, but should be supported and monitored. Similarly, individual students develop and change over time, so that it is important not to assume that once they have a piece of equipment that their needs will be met in perpetuity. As they develop and learn and as the technology also improves, there should be re-assessment and updating as appropriate.

Many of the uses that ICT has been put to have been technology driven. That is to say that people have done things with the technology because they can. At the same time, the power of the underlying hardware has grown exponentially (Moore’s Law) making new applications possible. To be led by the technology may seem inappropriate (particularly in such a human-centred area as education) it is to a large extent inevitable. It might seem appropriate to ask special education teachers what their needs are, what the technology might do for them, but in practice it is hard for them to envisage what might be possible.

An example is speech input. Until quite recently this might have been seen as a facility that would be useful for non-literate children, but dismissed as impractical. However with the increase in computing power available, it has become readily available and new applications – including in special education – are being found all the time.

It seems likely that there will be three areas in which the role of ICT will grow:

•    prostheses;

•    standard software;

•    educational software.

In the prosthetic role, as ICT is increasingly used by people with disabilities to reduce their handicap, so it will be applied in special education. This is likely to encourage integration in educational systems where that is preferred. Examples would be the use of alternative and augmentative communication (AAC) devices for face-to-face commun­ication. General applications (word processors, spreadsheets, databases etc) will continue to be used, but with the added empowerment that they can give to users with disabilities. There is some cross-over with the prosthetic role, so that, for instance, a spelling checker that is useful to most users is invaluable to some dyslexic writers.

Educational software currently takes the form of games and programs designed to teach skills and concepts. Computer-aided learning is still of a fairly general, simple drill-and-practice style. This can be most valuable to children with learning disabilities. Deeper learning will become possible as more intelligent software is developed – which incorporates a model of the learner. Such models are difficult to build for the average student and are even more challenging for learners who are so unusual that they are classed as having special educational needs. Such software will emerge – but not for some time yet. It will depend as much on better understanding of the psychology of learning as on better technology.

7.         Conclusions

Children with disabilities generally have special needs with regard to their education. Some of those needs can be met by information and communication technologies. As the technologies become more advanced and more available there is a significant opportunity to improve the quality of life of this disadvantaged group significantly.

Recommendations of the Meeting of Experts (Moscow, February 2000):

•    UNESCO and Member States should turn their attention to the fact that the real break-throughs in special needs education could be provided by introduction of ICTs in their learning, training and self-training;

•    IITE should become an international clearing house for the application of ICTs in education, in particular special needs education, and promote exchange of information and experience in this field. The examples of good practice of application of ICTs in exclusive and especially inclusive education of people with special needs in countries with different economic, social and cultural environments should be found and disseminated;

•    There is a need for stocking existing data and knowledge bases on the use of ICTs in special needs education and making it available for learners with special needs, their teachers, teacher trainers, other educators, and decision-makers, in particular through the IITE information facilities. Thus, for this purpose an information sub-system ‘ICTs in Education for People with Special Needs’ within the framework of the IITE international project ‘ICTs in Education: State-of-the-Art, Needs and Perspectives’ should be created. Specialized questionnaires are necessary for its continual up-dating and replenishing;

•    Education modules on application of ICTs in special needs education, first of all such modules for teacher training and re-training, should be developed within the framework of the intersectorial UNESCO project ‘The Status of Teachers and Teacher Education in the Information Society’ and included in the IITE educational programme.

8.         Glossary

AAC               Alternative and augmentative communication. Use of technology as a replacement for speech. The user specifies utterances and these are (usually) translated into synthetic speech.

ASCII             American Standard Code for Information Interchange. Pronounced ‘Askey’. A standard data transmission code, which is capable of representing 127 distinct codes, including all the Latin letters (upper- and lower-case), the digits, 0 to 9 and punctuation characters, such as brackets and full-stops. It also includes some unprintable control codes for formatting and printer control (e.g. formfeeds to end a printed page).

Asynchronous communication
See ‘synchronous/asynchronous communication’.

Bandwidth      Broadly, the rate at which information can be communicated along a channel. A high bandwidth interface can communicate a lot of information quickly and is required for rich forms of information, such as video. However, it will also be expensive. Simple information, such as text requires lower bandwidth and is less expensive.

GUI                Graphical user interface. A computer that is controlled mainly through a visual form of interaction, based on a screen, keyboard and mouse pointing device. Also sometimes referred to as a WIMP interface (windows, icon, menu and pointer).

ICT                 Information and communication technology. The term that has been coined to described the convergence of technologies that process information (mainly computers) and those which communicate it (networks).

Keyboard emulation
This software generates output which is indistinguishable from keys pressed on a keyboard to other software (such as a word processor). In this way, someone who cannot physically press keys can nevertheless use standard, keyboard-based software through some other style of interaction (such as selecting letters from menus on screen, using a single switch).

Prosthetic technology
Use of technology to reduce the handicapping effect of a disability. That is to say, using technology to perform actions that the non-disabled person might achieve without technology. An example is communication through an AAC device, in place of natural speech.

Screen reader  A piece of software which effectively interrogates the contents of a computer screen and converts it into a non-visual form. That form may be presented to the user in the form of synthetic speech or braille.

Sip and puff switch
A switch that is activate by a tube placed in the mouth. The switch has three states: neutral (off), one activated by blowing into it and the other by sucking on it.

Synchronous/asynchronous communication
Loosely, synchronous communication involves both participants simultaneously. For instance, a telephone conversation requires both people to be on the line at the same time, to respond to each other in turn. Asynchronous communication does not require immediate responses. For example, an email message will be normally read and responded to the next time the recipient logs on to the system and not necessarily as soon as it arrives.

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