Explaining computerized English testing in plain English

ɫèAV Languages
a pair of hands typing at a laptop

Research has shown that automated scoring can give more reliable and objective results than human examiners when evaluating a person’s mastery of English. This is because an automated scoring system is impartial, unlike humans, who can be influenced by irrelevant factors such as a test taker’s appearance or body language. Additionally, automated scoring treats regional accents equally, unlike human examiners who may favor accents they are more familiar with. Automated scoring also allows individual features of a spoken or written test question response to be analyzed independent of one another, so that a weakness in one area of language does not affect the scoring of other areas.

was created in response to the demand for a more accurate, objective, secure and relevant test of English. Our automated scoring system is a central feature of the test, and vital to ensuring the delivery of accurate, objective and relevant results – no matter who the test-taker is or where the test is taken.

Development and validation of the scoring system to ensure accuracy

PTE Academic’s automated scoring system was developed after extensive research and field testing. A prototype test was developed and administered to a sample of more than 10,000 test takers from 158 different countries, speaking 126 different native languages. This data was collected and used to train the automated scoring engines for both the written and spoken PTE Academic items.

To do this, multiple trained human markers assess each answer. Those results are used as the training material for machine learning algorithms, similar to those used by systems like Google Search or Apple’s Siri. The model makes initial guesses as to the scores each response should get, then consults the actual scores to see well how it did, adjusts itself in a few directions, then goes through the training set over and over again, adjusting and improving until it arrives at a maximally correct solution – a solution that ideally gets very close to predicting the set of human ratings.

Once trained up and performing at a high level, this model is used as a marking algorithm, able to score new responses just like human markers would. Correlations between scores given by this system and trained human markers are quite high. The standard error of measurement between ɫèAV’s system and a human rater is less than that between one human rater and another – in other words, the machine scores are more accurate than those given by a pair of human raters, because much of the bias and unreliability has been squeezed out of them. In general, you can think of a machine scoring system as one that takes the best stuff out of human ratings, then acts like an idealized human marker.

ɫèAV conducts scoring validation studies to ensure that the machine scores are consistently comparable to ratings given by skilled human raters. Here, a new set of test-taker responses (never seen by the machine) are scored by both human raters and by the automated scoring system. Research has demonstrated that the automated scoring technology underlying PTE Academic produces scores comparable to those obtained from careful human experts. This means that the automated system “acts” like a human rater when assessing test takers’ language skills, but does so with a machine's precision, consistency and objectivity.

Scoring speaking responses with ɫèAV’s Ordinate technology

The spoken portion of PTE Academic is automatically scored using ɫèAV’s Ordinate technology. Ordinate technology results from years of research in speech recognition, statistical modeling, linguistics and testing theory. The technology uses a proprietary speech processing system that is specifically designed to analyze and automatically score speech from fluent and second-language English speakers. The Ordinate scoring system collects hundreds of pieces of information from the test takers’ spoken responses in addition to just the words, such as pace, timing and rhythm, as well as the power of their voice, emphasis, intonation and accuracy of pronunciation. It is trained to recognize even somewhat mispronounced words, and quickly evaluates the content, relevance and coherence of the response. In particular, the meaning of the spoken response is evaluated, making it possible for these models to assess whether or not what was said deserves a high score.

Scoring writing responses with Intelligent Essay Assessor™ (IEA)

The written portion of PTE Academic is scored using the Intelligent Essay Assessor™ (IEA), an automated scoring tool powered by ɫèAV’s state-of-the-art Knowledge Analysis Technologies™ (KAT) engine. Based on more than 20 years of research and development, the KAT engine automatically evaluates the meaning of text, such as an essay written by a student in response to a particular prompt. The KAT engine evaluates writing as accurately as skilled human raters using a proprietary application of the mathematical approach known as Latent Semantic Analysis (LSA). LSA evaluates the meaning of language by analyzing large bodies of relevant text and their meanings. Therefore, using LSA, the KAT engine can understand the meaning of text much like a human.

What aspects of English does PTE Academic assess?

Written scoring

Spoken scoring

  • Word choice
  • Grammar and mechanics
  • Progression of ideas
  • Organization
  • Style, tone
  • Paragraph structure
  • Development, coherence
  • Point of view
  • Task completion
  • Sentence mastery
  • Content
  • Vocabulary
  • Accuracy
  • Pronunciation
  • Intonation
  • Fluency
  • Expressiveness
  • Pragmatics

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    In the early years of primary school, a child's brain is developing more quickly than it ever will again. Young minds are in the process of forming their very first habits, and so learning to pay attention on purpose will have a .

    The why: why is this particularly important in schools?

    If you're a teacher wondering why this is important, mindfulness has many benefits in the classroom. Perhaps the most notable is its facility for improving children's attention span during English lessons and elsewhere in life. This is increasingly important as children are immersed in a world of digital screens and social media. Learning to focus can help to counteract the constant demands on their attention and develop greater patience and staying power for any one activity.

    , experts agree that our attention span varies depending on what we are doing. The more experience we have of how much attention a certain situation needs, the more the brain will adapt and make it easier for us to focus on those situations.

    The brains of school-age children develop rapidly. So, the more we can do to demonstrate to them what it feels like to pay attention for a prolonged period, the more likely they are to be able to produce that level of attention in similar situations.

    For teenagers it is even more important. During adolescence, our brains undergo a unique period of neural development. The brain rapidly streamlines our neural connections to make the brain function as efficiently as possible in adulthood. Like a tree shedding branches, it will get rid of any pathways that are not being used and strengthen up the areas that are being used: use it or lose it. So if teenagers are not actively using their ability to pay conscious attention and spending too much time in automatic pilot mode, through screen use and in periods of high exam stress, the brain won't just not strengthen their capacity to focus; it may make it harder for them to access the ability to pay attention in future.

    The how: three exercises to teach your students mindfulness

    These three mindfulness exercises will help your language students integrate awareness into everyday activities in their school and home lives.

    1. Mindful use of screens and technology

    Screen use is a major culprit of setting the brain into automatic pilot. This is an activity you canpractice in school during computer-based lessons or even ask the students to practise at home.

    • Close your eyes and notice how you feel before you've started
    • Consciously decide on one task you need to do on the device
    • Consciously think about the steps you need to do to achieve that task and visualize yourself doing them
    • Then turn on the device and complete the task. When you have finished, put the device down, walk away, or do something different
    • Notice if you wanted to carry on using the device (this doesn't mean we need to)

    2. Mindful snacking

    We eat so habitually that we rarely notice the huge range of sensory stimulation going onunder the surface of this process. This is a great activity to practise with your students during breaks or lunch.

    • Hold the snack in your hand and notice five things you can see about it
    • Close your eyes and notice five things about the way it feels in your hand or to touch
    • Keep the eyes closed and notice five things you can smell about the snack
    • Bring the snack slowly to your mouth and taste it – notice five different subtle tastes

    3. Counting the breath

    A brilliantly simple exercise to teach the brain to focus attention on one thing for a longerperiod of time. It can be done anywhere and can also have the helpful side effect ofreducing stress through passively slowing down the breath.

    • Close your eyes or take a soft gaze in front of you
    • Focus your attention on the breath going in and out at the nostrils
    • Notice the breath temperature on the way into the nose compared to its temperature on the way out
    • Count 10 breaths to yourself – in 1, out 1; in 2, out 2; and so on
    • If the mind wanders, gently guide it back to the breath
    • When you get to 10 you can either stop there or go back to 1 and start again
    • In time, it will become easier to stay focused for the full 10 breaths and for even longer

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    Why is mindfulness important?

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    This is where mindfulness comes in.

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    In a school setting, this can help students regulate the stress surrounding exam pressure. Students can also learn to sit more comfortably with the impermanent emotions of adolescence, which seemed all-consuming and everlasting at the time.

    What can our students learn from mindfulness?

    Over the past decade, neuroscientific research has discovered that our brains are immensely malleable. Every interaction we have in our day-to-day lives builds connections that affect how our brains and thoughts function. Just like building muscle through exercise, our brain forms new matter in the areas we use most.

    In short, we can either continue to cement the habits we’ve already formed or build brain matter in areas that encourage healthier, more positive functioning.

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    Then we learn to be curious about what we notice in the present moment and that we can observe without judging or forming an opinion.

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