Explaining computerized English testing in plain English

app 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 app’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.

app 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 app’s Ordinate technology

The spoken portion of PTE Academic is automatically scored using app’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 app’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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  • A teacher standing over a desk where a student is sat, helping them. Students are also sat at desks in the background

    4 key challenges in secondary education

    Por Anna Roslaniec

    Let’s examine four of the most common challenges secondary teachers have and look into some strategies to help solve them.

    1. My students are afraid of making mistakes

    You’re not alone! Many teachers say their teenage students are quiet and unwilling to answer questions in class. Sometimes, this might simply be because they don’t know the answers, but more often than not, they are nervous about making mistakes.

    When children grow into teenagers, they tend to become more self-conscious and worried about what their peers think of them – and making mistakes in public is a big no-no for them. However, there are several ways to facilitate a safe learning environment where your students are happy and willing to talk. Sometimes, though, it takes a little experimentation. Here are some things you can try:

    Celebrate mistakes

    When students make mistakes, ensure that you praise them for taking a risk or making an effort. Correct their errors and be clear with the rest of the class that the only way to learn is to try new things.

    Be firm

    Don’t tolerate any bullying or laughing when someone gets an answer wrong. If your students fear that others will mock them for their efforts, they’ll stay quiet. So make sure you have clear rules and that your students understand that mistakes are normal and to be expected.

    Have students discuss their answers in pairs or groups

    If your students are painfully shy and afraid of making mistakes, avoid picking on individuals to answer questions in front of the class. Instead, when asking a question, tell your students to discuss it in pairs or small groups first. This will allow them to formulate their ideas and feel more confident. Afterwards, you can ask the pairs to share what they discussed – leading to a natural open-class discussion.

    Listen to your students

    Another, powerful way of engaging your students in discussion is to listen to a conversation they are having with their partners and then express how impressed you are with their ideas during a feedback session. E.g. “You said X, which I thought was very interesting. Could you explain this to the class? It was a great idea.” This gives them the confidence to share their thoughts.

    2. My students are not engaged with the activities I choose

    This is another very common problem for teachers of teenagers. You spend a lot of time thinking of fun, interesting activities – then, when you present them to the class, your students look away and say they’re bored. Soon enough, you’ll get frustrated and not know how to re-engage them. Here are some ideas to help:

    Get to know your students

    Without fail, the best way to engage your students is by getting to know them as individuals over the year. Find out about their hobbies and interests outside of school, and learn what makes them laugh and what worries them. Use your knowledge of your students to find interesting books to read, videos to watch, or relevant subjects to discuss. This way, you’ll deliver tailored lessons your students find truly interesting and useful.

    Allow a degree of autonomy

    Sometimes quietness is also a sign of disengagement with the learning materials. To get past this obstacle, you can get your students to brainstorm things that interest them in groups, list them on the board and have a class vote on the topic of their next class project. As a teacher, you always have the power to veto inappropriate ideas, but giving students a voice is a powerful way of making them feel valued and involved in their own education.

    Make things (a little) competitive

    Even teenagers love games! And play is an integral part of learning, as it allows our students to be themselves, have fun, and communicate freely at the same time. By allowing them to play language-focused games in class, they’ll soon forget their inhibitions and start talking.

    3. My students just want to do grammar exercises

    Language is all about communication, speaking, listening, reading and writing – yet all your students want to do is grammar exercises. Frustrating as this is, it’s probably a sign that our students are not confident in their speaking or listening abilities. Here’s what you can do:

    Encourage free language practice

    Grammar activities are very structured and there is often a clear answer. Day-to-day communications, however, are much freer, which can intimidate less confident students. This activity will help you combine the two aspects of language learning:

    • Put students in small groups and give them a set of cards with exciting topics printed on them—for example; music, sports, environment, school, vacations, friends, food.
    • Tell students that they should each choose a card and speak freely about their topic for 30 seconds – the short time will help them overcome their fear of speaking and can be gradually increased as they get used to this type of activity.
    • Have students record themselves when they are speaking and then, when they listen back, have them identify the grammatical structures they used.

    They should write down and correct any mistakes under your guidance. Not only will this get students used to talking and encourage a lot of emergent language, but it will also help them feel they are practicing grammar.

    If your students really enjoy learning grammar, you can ‘flip’ your grammar activities and make them more communicative. First, provide them with a series of sentences or listening clips which have a common grammatical structure (second conditional sentences, for example).

    Then have students work together (in English) to identify how the language is structured, so they can discover the grammar point for themselves. This not only gets them talking, but they are doing something they feel confident at.

    4. My students are bored of all the repetition

    Repetition is an important part of language learning. By practicing things over and over again, your students will come to understand it better and will be able to produce the language more easily. However, repetition is often quite dull, especially for fast learners. Here’s how you can make things more interesting for your teenage students:

    Use a greater variety of activities to engage your learners

    If you’ve been teaching your students a particular set of vocabulary, a grammatical structure, or some pronunciation rules, think about how else they can practice them.

    For example, instead of drilling pronunciation over and over again, ask students to think of all the words they can think of that have the same sound in them (e.g. book, look, cook, shook, etc.). This will help them ‘hear’ the sounds in their heads and improve their understanding of other words.

    If you have been learning vocabulary through reading, have students write or tell stories that incorporate the words.

    The idea is not to stop repeating the target language or skill, but to practice it in different ways. Apply this principle to other areas of language learning so your students won’t feel like they are repeating things.