Explaining computerized English testing in plain English

ɫèAV Languages
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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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    Praise in the classroom is a valuable resource that every teacher has in their toolbox.It can encourage struggling students and reward learners who have been studying diligently and working hard on their language skills.

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    Different types of praise in the classroom

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    • Personal praise: Here you praise a student for a specific ability or quality. For example, you might say something like,“You have a great memory for vocabulary”.
    • Effort-based praise: Thisis when you comment on a student’s efforts. For example, you could say,“I can see you tried really hard with this vocabulary homework – well done.”
    • Behavior-based praise:This type of praiseis where you comment on how a student is acting, an example would be,“You were really paying attention during the vocabulary lesson – good job.”

    So how – and when – should we use these types of praise in the classroom?

    Try not to praise ability

    The first type of praise – personal praise – should be avoided in the classroom.has shown that this type of praise doesn’t have a beneficial effect on motivation.

    In fact, praise for intelligence actually has a detrimental effect on student achievement. When students were praised for their intelligence, they tended to care more about their performance goals – the score they achieved on a test, for example. Learning goals, like mastering a new skill, became less important to them.

    Moreover, personal praise has been shown to undermine student resilience in the face of failure. Students showed less persistence when it came to challenging tasks and less enjoyment of the challenge. They also performed more poorly than children praised for effort.

    Furthermore, when you praise students for their ability, they also tend to see intelligence or aptitude as a fixed trait. However, students who are praised for effort are more likely to see ability as something they can improve on. This feeds into the development of a growth mindset vs a fixed mindset.It’s important toinstilla growth mindset in learners to enable them to reach their full potential.

    How to praise effort and behavior

    When it comes to praising effort and behavior, what’s the most effective way to do it? Here are some techniques to employ:

    1. Be specific

    General praise such as “Good job” isn’t nearly as effective as a comment that shows you’ve been paying attention to what the student is doing. A precise compliment will make a much bigger impact on a student, for example:“I was really impressed at how hard you concentrated during the listening exercise. Well done.”

    2. Give praise in the moment

    Immediate praise doesn’t need to be disruptive, but it shows students that you are paying attention and noticing good behavior and effort.

    3. Avoid comparisons with other students

    Instead of saying, “You got the best mark in the class – well done!” say something like,“You got a really high score in the reading test. Your hard work has really paid off this term.”

    4. Keep track of praise

    Before your class, choose three or four students you’re going to praise that day. That way, you can be sure that each and every student will benefit from the motivational power of effective classroom praise!

    5. Personalize your praise, depending on the student

    Young students enjoy being praised publicly, but shy students, older children and teenagers prefer positive feedback to be given quietly.

    Don’t overpraise and watch your positive bias

    It’s important to be sincere. Older children, especially adolescents, have an extremely low tolerance of insincerity. So, don’t be tempted to praise students too often, or too effusively – it can actually have a negative impact on your relationship with your whole class. Insincere praise can lead students to question your judgement.

    It’s also really important to be aware of your positive bias.that teachers consistently give students of color more positive feedback on their work. It’s done with good intentions, but it can actually be harmful. If you regularly overpraise students for minor achievements, it can imply that you have low expectations for these students. And, this can make your students feel like they might not be capable of fulfilling the high expectations that you should have of them.

    So, instead of overpraising, focus on giving specific, immediate praise to motivate your students, boost theirself-esteem and unlock their potential.

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