Explaining computerized English testing in plain English

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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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    6 tips for planning your first English classes

    By Nicole Kyriacou

    You are nervous, yet excited. You want to appear relaxed and fun, but still be taken seriously. Most of all, you are keen to make an excellent first impression.

    With all that in mind - planning your first English classes of the year can be a daunting experience.

    Here are six things to consider when planning your first classes:

    1. Set clear aims

    Whether you are teaching young learners, teenagers or adults, it’s important you discuss the aims and objectives of the course from day one. You’ll need to learn more about your students' needs to do this. Why are they learning English? Do they want to prepare for an official exam? What activities do they enjoy? What things do they need to improve the most?

    The way you do this will depend on the age of your learners. For example, with adults and teens, you could get them to interview each other and write a report about what they found out. With younger children, do a survey they can complete using smiley faces.

    2. Find out students’ interests

    Although you should understand your students' needs and why they want to learn English - to help make your classes relevant and engaging - you should also discover what they enjoy doing outside of class.

    To do this, get students to write mini bios you can stick around the classroom. Or have them prepare presentations where they share something they are passionate about with the rest of the class - using coursebooks. As a class, go through the contents page, vote on which topics students find most interesting, and start with those.

    3. Break the ice

    You want your first class to be fun so that students are motivated, and associate English language learning with something they can enjoy. Ice-breakers can also be an excellent way to get to know each other and learn about your students' current level of English.

    Activities where students have to ask each other questions work well.

    4. Provide a comfortable environment

    Young learners and teenagers tend to be shy at the start of a course - especially if they don’t know each other. Develop a rapport and break down boundaries by including team-building activities in your first class.Your aim is to have all the students feeling more comfortable with each other before the end of the lesson so that there are no awkward silences in future lessons.

    5. Manage expectations

    Managing expectations is an essential part of a teacher's job. Make sure in the first class you are clear about what you expect from your students and what they can expect from you.

    Have students brainstorm the rules for the class and then make a big poster or ‘class contract’ which all students have to sign. Display the poster on the wall so you can always refer to it if someone misbehaves.

    Try to keep the rules as positive as possible. Instead of writing: 'Don’t speak your first language', write: 'Try to always speak English and ask if you don’t know a word'. If you are feeling really brave, you can even get your students to devise a list of rules for you which you can display on the wall next to theirs.

    6. Make it challenging

    It’s great making your first lesson fun - but there’s nothing more motivating than leaving a new class and feeling like you’ve made a good decision and you are going to learn lots (and you aren’t wasting your time or money). This is especially important for adult learners.

    So, as well as getting to know each other and finding out their needs, teach them something new. This could be 10 new pieces of vocabulary, how to structure a letter or report, or a list of resources they can use at home to practice their English.