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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  • Children in a classroom with their hands up

    8 first lesson problems for young learners

    By Joanna Wiseman

    The first class with a new group of young learners can be a nerve-wracking experience for teachers old and new. Many of us spend the night before thinking about how to make a positive start to the year, with a mixture of nerves, excitement, and a desire to get started. However, sometimes things don’t always go as expected, and it is important to set a few ground rules in those early lessons to ensure a positive classroom experience for all, throughout the academic year.

    Let’s look at a few common problems that can come up, and how best to deal with them at the start of the school year.

    1. Students are not ready to start the class

    How the first few minutes of the class are spent can greatly influence how the lesson goes. Students can be slow to get out their equipment and this can cause a lot of time wasting. To discourage this, start lessons with a timed challenge.

    1. Tell students what you want them to do when they come into class, e.g. sit down, take out their books and pencil cases, sit quietly ready for the lesson to start.
    2. Time how long it takes for everyone to do this and make a note. Each day do the same.
    3. Challenge students to do this faster every day. You could provide a goal and offer a prize at the end of the trimester if they reach it, e.g. be ready in less than a minute every day.

    2. Students speak their first language (L1) in class

    One of primary teachers' most common classroom management issues is getting them to speak English. However, young learners may need to speak their mother tongue occasionally, and a complete ban on L1 is often not the best solution. But how can we encourage students to use English wherever possible?

    Tell students they have to ask permission to speak in L1, if they really need to.

    • 3 word rule — tell students that they can use a maximum of three words in L1 if they don’t know them in English.
    • Write ENGLISH on the board in large letters. Each time someone speaks in L1, erase a letter. Tell students each letter represents time (e.g. 1 minute) to play a game or do another fun activity at the end of the lesson. If the whole word remains they can choose a game.

    3. Students don’t get on with each other

    It is only natural that students will want to sit with their friends, but it is important that students learn to work with different people. Most students will react reasonably if asked to work with someone new, but occasionally conflicts can arise. To help avoid uncomfortable situations, do team building activities, such as those below, at the beginning of the school year, and do them again whenever you feel that they would be beneficial:

    • Give students an icebreaker activity such as 'find a friend bingo' to help students find out more about each other.
    • Help students learn more about each other by finding out what they have in common.
    • Balloon race. Have two or more teams with an equal number of students stand in lines. Give each team a balloon to pass to the next student without using their hands. The first team to pass the balloon to the end of the line wins.
    • Team letter/word building. Call out a letter of the alphabet and have pairs of students form it with their bodies, lying on the floor. When students can do this easily, call out short words, e.g. cat, and have the pairs join up (e.g. three pairs = group of six) and form the letters to make the word.

    4. Students don’t know what to do

    When the instructions are given in English, there will inevitably be a few students who don’t understand what they have to do. It is essential to give clear, concise instructions and to model the activity before you ask students to start. To check students know what to do and clarify any problems:

    • Have one or more students demonstrate using an example.
    • Have one student explain the task in L1.
    • Monitor the task closely in the first few minutes and check individual students are on the right track.

    5. A student refuses to participate/do the task

    This is a frequent problem that can have many different causes. In the first few lessons, this may simply be shyness, but it is important to identify the cause early to devise an effective strategy. A few other causes might include:

    • Lack of language required to respond or do the task. Provide differentiation tasks or scaffolding to help students with a lower level complete the task or have them respond in a non-oral way.
    • Low self-confidence in their ability to speak English. Again, differentiation and scaffolding can help here. Have students work in small groups or pairs first, before being asked to speak in front of the whole class.
    • Lack of interest or engagement in the topic. If students aren’t interested, they won’t have anything to say. Adapt the topic or task, or just move on.
    • External issues e.g. a bad day, a fight with a friend, physical problems (tiredness/hunger/thirst). Talk to the student privately to find out if they are experiencing any problems. Allow them to 'pass' on a task if necessary, and give them something less challenging to do.

    It is important not to force students to do something they don’t want to do, as this will cause a negative atmosphere and can affect the whole class. Ultimately, if a student skips one or two tasks, it won’t affect their achievement in the long run.

    6. Students ask for repeated restroom/water breaks

    It only takes one student to ask to go to the restroom before the whole class suddenly needs to go! This can cause disruption and stops the flow of the lesson. To avoid this, make sure you have rules in place concerning restroom breaks:

    • Make sure students know to go to the restroom before the lesson.
    • Have students bring in their own water bottles. You can provide a space for them to keep their bottles (label them with student names) in the classroom and have students fill them daily at the drinking fountain or faucet.
    • Find out if anyone has any special requirements that may require going to the restroom.
    • Provide 'brain breaks' at strategic points in the lesson when you see students becoming restless.

    7. Students don’t have the required materials

    • Provide parents with a list of materials students will need on the first day.
    • If special materials are required in a lesson, give students a note to take home or post a message on the school platform several days before.
    • Don’t blame the student - whether they have a good reason or not for turning up to class empty-handed, making a child feel guilty will not help.
    • Write a note for parents explaining why bringing materials to class is important.

    8. Students are not listening/talking

    Getting their attention can be challenging if you have a boisterous class. Set up a signal you will use when you want them to pay attention to you. When they hear or see the signal, students should stop what they are doing and look at you. Some common signals are:

    • Raising your hand- When students see you raise your hand, they should raise their hands and stop talking. Wait until everyone is sitting in silence with their hands raised. This works well with older children and teenagers.
    • Call and response attention-getters - These are short phrases that prompt students to respond in a certain way, for example: Teacher: "1 2 3, eyes on me!"Students: "1 2 3, eyes on you!". Introduce a new attention-getter every few weeks to keep it fun. You can even have your students think up their own phrases to use.
    • Countdowns -Tell students what you want them to do and count backwards from ten to zero, e.g. "When I get to zero, I need you all to be quiet and look at me. 10, 9, 8 …"
    • Keep your voice low and speak calmly -This will encourage students to stop talking and bring down excitement levels.
    • A short song or clapping rhythm -With younger children, it is effective to use music or songs for transitions between lesson stages so they know what to do at each stage. For primary-aged children, clap out a rhythm and have them repeat it. Start with a simple rhythm, then gradually make it longer, faster, or more complex.