Explaining computerized English testing in plain English

app 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 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

More blogs from app

  • Children sat down on the floor reading books, with some looking up at their teacher who is sat with a book

    How to improve literacy in the classroom

    Por Katharine Scott
    Reading time: 5 minutes

    Katharine Scott is a teacher trainer and educational materials developer with over 20 years’ experience writing English language textbooks. She’s co-author of the app Primary course - English Code and is based in Spain. Katharine outlines a number of practical ways you can help English language learners develop key literacy skills.

    What is literacy?

    Teachers at all stages of education often complain about their students’ reading skills. The students are literate. In other words, they can interpret the graphemes, or letters on the page, into words. But they struggle to identify the purpose of a text or to analyze it in a meaningful way. We could say that the students have poor literacy skills.

    Literacy is a term used to describe an active, critical form of reading. Some of the skills of a critical reader include:

    Checking new information

    A crucial literacy skill involves discerning whether a text is factually true or not. A critical reader always checks new information against existing knowledge. As we read, we have an internal dialogue: Where does that information come from? That’s impossible because ….

    Separating fact from opinion

    This skill is essential for understanding many different types of texts from newspaper articles to scientific research.

    Understanding the purpose of a text

    All pieces of text have a main purpose. This may be entertainment, in the case of a story or persuasion, in the case of advertising. A critical reader will know how to identify the purpose of the text.

    In the classroom, different types of text require different responses from the students. It’s important, as students grow older, that they know how to read and respond appropriately to a piece of written information.

    Identifying key information in a text

    This is an essential skill for summarizing information or following instructions. It is also important when we transform written information into something else, like a chart.

    In many ways, literacy is the key skill that underpins learning at all stages. This may seem like an exaggeration, but consider the importance of the four skills outlined above.

    Strategies to promote literacy

    Many teachers and parents of early learners instinctively develop literacy skills before the children can even read.

    When we read a story out loud to a child, we often ask questions about the narrative as we turn the pages: What is going to happen next? How do you think …. feels? Why is …?

    These questions set the foundations for literacy.

    Working with a reading text

    Too often, the comprehension questions that teachers ask about a text are mechanical. They ask the student to “lift” the information out of the text.

    A tale of two dragons

    "Once upon a time, there was an island in the sea. One day, people were working in the fields. The sun was shining and there was one cloud in the sky. The cloud was a strange shape and moving towards the island. Soon the cloud was very big. Then a small boy looked up."

    Taken from English Code, Unit 4, p. 62

    Typical comprehension questions based on the text would be:

    • Where were the people working?
    • How many clouds were in the sky?

    These questions do not really reflect on the meaning of the text and do not lead to a critical analysis. While these simple questions are a good checking mechanism, they don’t help develop literacy skills.

    If we want to develop critical readers, we need to incorporate a critical analysis of reading texts into class work through a deep reading comprehension. We can organize the comprehension into three types.

    1. Text level

    Comprehension at “text level” is about exploring the meaning of individual words and phrases in a text. Examples for the text above could be:

    • Find words that show the story is a fairy tale.
    • Underline a sentence about the weather.

    Other text-level activities include:

    • Finding words in the text from a definition
    • Identifying opinions in the text
    • Finding verbs of speech
    • Finding and classifying words or phrases

    2. Between the lines

    Comprehension “between the lines” means speculating and making guesses with the information we already have from the text. This type of literacy activity often involves lots of questions and discussions with the students. You should encourage students to give good reasons for their opinions. An example for the text above could be:

    • What do you think the cloud really is?

    Other “Between the lines” activities include:

    • Discussing how characters in a story feel and why
    • Discussing characters’ motivation
    • Identifying the most important moments in a story
    • Speculating about what is going to happen next
    • Identifying possible events from fantasy events

    Literacy activities are not only based on fiction. We need to help students be critical readers of all sorts of texts. The text below is factual and informative:

    What skills do you need for ice hockey?

    "Ice hockey players should be very good skaters. They always have good balance. They change direction very quickly and they shouldn't fall over. Players should also have fast reactions because the puck moves very quickly."

    Taken from English Code, Level 4, p. 96

    “Between the lines” activities for this text could be:

    • What equipment do you need to play ice hockey?
    • What is the purpose of this piece of text?

    3. Behind the lines

    Comprehension “behind the lines” is about the information we, the readers, already have. Our previous knowledge, our age, our social background and many other aspects change the way we understand and interpret a text.

    An example for the text above could be:

    • What countries do you think are famous for ice hockey?

    Sometimes a lack of socio-cultural knowledge can lead to misunderstanding. Look at the text below.

    Is the relationship between Ms Turner and Jack Roberts formal or informal?

    73 Highlands Road Oxbo, Wisconsin 54552
    April 11th

    Dear Ms. Tamer,
    Some people want to destroy the forest and build an airport. This forest is a habitat for many wolves. If they destroy the forest, the wolves will leave the forest. If the wolves leave the forest, there will be more rabbits. This won't be good for our forest.
    Please build the airport in a different place. Please don't destroy the forest.

    Kind regards, Jack Robers

    Taken from English code, Level 4, unit 5, Writing Lab

    If your students are unaware of the convention of using Dear to start a letter in English, they may not answer this question correctly.

    Other “Behind the lines” literacy activities include:

    • Identifying the type of text
    • Imagining extra information based on the readers’ experiences
    • Using existing knowledge to check a factual account
    • Identifying false information

    Examples:

    • What job do you think Ms Turner has?
    • Do you think Jack lives in a village or a city?
    • Do wolves live in forests?

    Literacy is more than reading

    From the activities above, it’s clear that a literacy scheme develops more than reading skills. As students speculate and give their opinions, they talk and listen to each other.

    A literacy scheme can also develop writing skills. The text analysis gives students a model to follow in their writing. In addition, a literacy scheme works on higher-order thinking skills such as analysis, deduction and summary.

    Developing literacy skills so that students become active, critical readers should be a key part of educational programs at all ages. Literacy activities based on a reading text can be especially useful for the foreign language class.

    With literacy activities, we can encourage students:

    • To use the text as a springboard for communicating ideas and opinions
    • To analyze the text as a model for writing activities
    • To see how language is used in context
    • To explore the meanings of words

    More crucially, we are developing critical readers for the future.

  • Two Young children high fiving one another

    The importance of teaching values to young learners

    Por Katharine Scott

    Values in education

    The long years children spend at school are not only about acquiring key knowledge and skills. At school, children also learn to work together, share, exchange opinions, disagree, choose fairly, and so on. We could call these abilities social skills as they help children live and flourish in a wider community than their family circle.

    Social skills are not necessarily the same as social values. Children acquire social skills from all kinds of settings. The tools they use to resolve problems will often come from examples. In the playground, children observe each other and notice behavior. They realize what is acceptable to the other children and which strategies are successful. Some of the things they observe will not reflect healthy social values.

    Part of a school’s mission is to help children learn social skills firmly based on a shared set of values. Many schools recognize this and have a program for education in values.

    What values are we talking about?

    Labeling is always tricky when dealing with an abstract concept such as social values. General ideas include:

    • living in a community, collaborating together
    • respecting others in all of human diversity
    • caring for the environment and the surroundings
    • having a sense of self-worth.

    At the root of these values are ethical considerations. While it may seem that primary education is too early for ethics, children from a very young age do have a sense of fairness and a sense of honesty. This doesn’t mean that children never lie or behave unfairly. Of course they do! But from about three years old, children know that this behavior is not correct, and they complain when they come across it in others.

    In the school context, social values are too often reduced to a set of school rules and regulations. Typical examples are:

    • 'Don't be late!'
    • 'Wait your turn!'
    • 'Pick up your rubbish!'
    • 'Don't invent unkind nicknames'.

    While all these statements reflect important social values, if we don’t discuss them with the children, the reasoning behind each statement gets lost. They become boring school rules. And we all know that it can be fun to break school rules if you can get away with it. These regulations are not enough to represent an education in values.

    School strategies

    At a school level, successful programs often focus on a specific area of a values syllabus. These programs involve all members of a school community: students, teachers, parents, and administrative staff.

    Here are some examples of school programs:

    Caring for the environment

    Interest in ecology and climate change has led many schools to implement programs focused on respect for the environment and other ecological issues. Suitable activities could include:

    • a system of recycling
    • a vegetable garden
    • initiatives for transforming to renewable energy
    • a second-hand bookstore.

    Anti-bullying programs

    As,many schools have anti-bullying policies to deal with bullying incidents. However, the most effective programs also have training sessions for teachers and a continuous program for the children to help them identify bullying behavior. Activities include:

    • empathy activities to understand different points of view
    • activities to develop peer responsibility about bullying
    • activities aimed at increasing children’s sense of self-worth.

    Anti-racism programs

    Combating negative racial stereotypes has, until recently, relied mainly on individual teacher initiatives. However, as racial stereotypes are constructed in society, it would be useful to have a school-wide program. This could include:

    • materials focusing on the achievements of ethnic minorities
    • school talks from members of ethnic minority communities
    • empathy activities to understand the difficulties of marginalized groups.
    • study of the culture and history of ethnic minorities.

    As children learn from observed behavior, it’s important that everyone in the school community acts consistently with the values in the program.