Interactive Speaking is different from most speaking questions on the Duolingo English Test.

You are not simply given a prompt, recording an answer, and moving on to an unrelated question.

Instead, you are having a simulated conversation.

What you say can influence what comes next.

Recent research from the Duolingo English Test gives us a much better look at what is happening behind the scenes. The research shows that the system can evaluate how completely you addressed a question, identify ideas that could be explored further, and use that information when selecting follow up questions. (Test Center)

For students preparing for the DET, this matters.

It means Interactive Speaking should not be practiced as a series of memorized speeches.

You need to practice having a conversation.

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What Is Interactive Speaking on the DET?

Interactive Speaking was introduced to make speaking assessment more similar to real communication.

Instead of answering unrelated prompts, you interact with a virtual character through a series of connected questions.

According to Duolingo's description of the task, Interactive Speaking currently includes:

• 6 to 8 conversation turns
• 35 seconds to respond to each prompt
• No preparation time
• Follow up questions that can be personalized based on your previous responses (Test Center)

That last point is what makes the task especially interesting.

The conversation is not necessarily identical for every test taker.

Your Answer Can Affect What Comes Next

Imagine the first question is:

What is one activity you enjoy doing in your free time?

You answer:

I really enjoy hiking because I live close to the mountains. I usually go hiking on weekends with two of my friends. I especially like longer trails because I enjoy being outdoors for several hours.

The conversation now has several possible directions.

The next question might explore:

Why do you prefer outdoor activities?

Or:

Do you think hiking with friends is better than hiking alone?

Or the conversation might move toward another related idea.

Duolingo explains that the system evaluates what you said and how well you answered the question, and those considerations help determine subsequent questions. (Test Center)

That makes Interactive Speaking fundamentally different from simply memorizing an answer to:

"Describe your favorite hobby."

What Is the AI Looking At?

Duolingo says Interactive Speaking evaluates several speaking subskills, including:

Fluency

Can you speak naturally without excessive hesitation?

Grammar

Can you construct accurate sentences and use a useful range of structures?

Pronunciation

Can your speech be understood clearly?

Vocabulary

Can you choose appropriate words and demonstrate sufficient range?

Coherence

Do your ideas connect logically?

Task completion

Did you actually answer what the question asked? (Test Center)

That final one is particularly important for understanding the adaptive conversation.

A long answer isn't necessarily a complete answer.

Longer Does Not Automatically Mean Better

Suppose the question is:

Do you think students should have part time jobs while attending university? Why or why not?

Student A says:

University students are very busy. There are many universities in my country. Students study many subjects, and education is very important. Some students live at home and some live in dormitories. University can be difficult.

The English may be acceptable.

But did the student really answer the question?

Not very well.

Now consider:

I think a part time job can be useful for university students as long as they don't work too many hours. It gives them work experience and helps them become more independent. For example, working ten hours a week might be manageable, but working thirty hours could interfere with studying.

This response directly answers the question and develops the position.

That's the habit you want to build.

Duolingo's broader scoring explanation likewise emphasizes whether a response is relevant and well developed, alongside coherence, vocabulary, grammar, fluency, and pronunciation. (Test Center)

Don't Waste Your First 10 Seconds

You only have 35 seconds for each Interactive Speaking response.

And there is no preparation time. (Test Center)

That means spending ten seconds trying to construct the perfect opening sentence is expensive.

You don't need:

This is an extraordinarily interesting question that has many different perspectives that should be carefully considered...

Get to the answer.

Question: Do you prefer studying alone or with other people?

Start with:

I usually prefer studying alone because I can concentrate better.

Now develop it.

When I study with friends, we sometimes start talking about unrelated things. If I'm preparing for an important exam, I can usually finish much more work by myself.

You have already provided:

Position → Reason → Example

That's enough structure to create a developed response without sounding memorized.

A Simple Structure for Interactive Speaking

You don't need a complicated template.

A flexible structure is much better:

1. Answer

Give a direct response to the question.

2. Explain

Tell the listener why.

3. Develop

Add an example, consequence, comparison, experience, or additional detail.

For example:

Question: Do you think technology has improved education?

Answer:
Yes, I think technology has improved education considerably.

Explain:
Students have much easier access to information and learning materials than they did in the past.

Develop:
For example, if I don't understand something from a class, I can watch another explanation online immediately instead of waiting until my next class.

This isn't a script to memorize.

It's a way to develop ideas naturally.

Be Ready for the Conversation to Change Direction

Real conversations don't stay on one tiny subject forever.

Neither does Interactive Speaking.

Duolingo specifically designed the task to measure skills involved in real time interaction, including topic development, organization, and responding as the conversation evolves. (Test Center)

So don't become mentally attached to the answer you prepared for the previous question.

Read or listen carefully to the new question.

Then answer that question.

This sounds obvious, but students who rely heavily on templates can struggle when the conversation moves somewhere they didn't expect.

Why Memorized Answers Can Become a Problem

Memorized language isn't automatically bad.

Useful expressions can help you speak more naturally:

One reason I think this is...

A good example would be...

On the other hand...

From my experience...

These are normal pieces of language.

The problem comes when you memorize an entire 30 second response and try to force every question into it.

Interactive Speaking is specifically designed around connected, adaptive interaction. Duolingo says each turn is selected in real time based partly on what the test taker has said. (Test Center)

You cannot reliably predict the whole conversation.

Instead of memorizing answers, practice generating ideas.

Practice Extending One Topic in Different Directions

Here's a useful exercise.

Start with one simple topic:

Working from home

Now generate questions around it:

Do you prefer working from home or in an office?

What are the biggest advantages of working from home?

What problems can remote workers experience?

Do you think companies should allow employees to choose where they work?

How might remote work change cities in the future?

Notice what happened.

The topic remained connected, but the thinking changed.

You had to:

state a preference

then explain advantages

then identify problems

then give an opinion

then make a prediction

That is much closer to interactive speaking than practicing the same prepared speech five times.

Practice Follow Up Questions

You can also practice by deliberately creating follow ups from your own answer.

Suppose you say:

I prefer living in a small city because it's quieter and there is less traffic.

Immediately ask yourself:

Why is less traffic important to you?

Then answer.

Next:

What disadvantages does a small city have?

Answer again.

Then:

Would you still prefer a small city if you were a university student?

Now you have to adjust.

This teaches you to respond to the direction of the conversation, not simply repeat the same vocabulary.

Don't Panic If the Questions Seem More Difficult

One particularly interesting finding from Duolingo's adaptive-speaking research concerns question difficulty.

Because different conversations can develop differently, not every test taker necessarily receives questions of identical difficulty.

Researchers therefore used Item Response Theory, or IRT, to account for differences in prompt difficulty when estimating speaking ability. (Test Center)

In simple terms:

A harder question isn't automatically bad news.

The assessment model is designed to consider difficulty rather than pretending every possible question is equivalent.

Duolingo reports that incorporating IRT improved test retest reliability by an amount comparable to increasing the effective test length by roughly 31%, without actually making students answer more questions. (Test Center)

You don't need to understand the mathematics behind IRT to prepare for the DET.

The useful takeaway is:

Don't spend the test trying to judge whether your question is easy or hard.

Answer the question in front of you.

Interactive Speaking Is Testing Conversation, Not Just Speech

This is perhaps the biggest lesson from the research.

Researchers compared language produced during Interactive Speaking with language from traditional monologue style speaking tasks.

They found that Interactive Speaking elicited language that was more characteristic of actual conversation. (Test Center)

That's precisely why your preparation should be different.

If you're practicing only by recording two minute speeches about random topics, you're practicing speaking.

But you're not necessarily practicing interaction.

You also need to become comfortable:

responding immediately,

following a changing topic,

developing something you just said,

clarifying your position,

giving examples,

comparing alternatives,

and reacting to unexpected questions.

A 15 Minute Interactive Speaking Practice Routine

You don't need to spend hours every day.

Try this:

Minutes 1 to 3: Warm up

Choose an everyday subject and speak about it without stopping.

Minutes 4 to 8: 35 second responses

Answer several DET style questions with exactly 35 seconds for each response.

Don't restart when you make a mistake.

Keep going.

Minutes 9 to 12: Follow ups

Take one of your answers and generate three related questions.

Answer each one immediately.

Minutes 13 to 15: Review

Listen to your responses.

Ask:

Did I answer the actual question?

Did I develop my answer?

Did I repeat myself?

Did I hesitate excessively?

Was my grammar understandable?

Did I use enough vocabulary?

Could someone easily follow my ideas?

That final review is where a lot of improvement happens.

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The Biggest Takeaway

Interactive Speaking isn't simply another DET speaking prompt with a different interface.

It's designed to create a connected conversation.

Your previous responses can help shape what happens next, and Duolingo's research shows that the assessment is designed to account for differences in the questions different test takers encounter. (Test Center)

So don't prepare by trying to memorize the perfect 35 second speech.

Practice doing something more useful:

Answer the question.

Develop the idea.

Listen to where the conversation goes next.

Respond naturally.

That's much closer to the ability Interactive Speaking is designed to measure.

Practice Interactive Speaking With DET Study

Understanding Interactive Speaking is useful. Getting comfortable answering unpredictable questions under a 35 second timer requires practice.

With DET Study, you can practice Duolingo English Test speaking tasks and use AI scoring and feedback to identify areas such as vocabulary, grammar, fluency, and response development that still need work.

Instead of memorizing one perfect answer, use practice to become comfortable producing a new answer when the question changes.

That is exactly the skill you want available on test day.

Frequently Asked Questions

How many questions are in DET Interactive Speaking?

Duolingo currently describes Interactive Speaking as a conversation containing 6 to 8 turns, with 35 seconds to answer each prompt and no preparation time before responding. (Test Center)

Does DET Interactive Speaking change questions based on my answers?

Yes. Duolingo says the task evaluates what you said and how well you addressed the question, and that information can help determine which follow up question comes next. The conversation can therefore develop differently depending on your responses. (Test Center)

Should I use a template for DET Interactive Speaking?

A flexible structure such as answer → reason → example or detail can help organize your response, but memorizing complete answers is much less useful for an adaptive conversation. You cannot reliably predict the follow up questions, so practice developing ideas and responding naturally rather than forcing every question into the same script.