Here is something I see all the time. Someone has genuinely good English. Their grammar is fine. Their pronunciation is clear. They sit the TOEFL Speaking section, walk away feeling okay, and the score still will not move. They assume the problem must be some hidden grammar flaw, or an accent, or nerves.
It is usually something much simpler, and much easier to fix. They are not saying enough, and what they do say has no shape.
I can show you this with data, because we looked. Across more than 3,300 scored interview answers on My Speaking Score, the gap between high and low responses came down to two things you can control starting today: how much you say, and the order you say it in.
Quick answer
On the TOEFL Speaking "Take an Interview" task, the strongest answers in our data were longer and better organized than the weak ones. High-scoring answers (4.0 and above on our AI scorer) averaged about 99 words. Low-scoring answers (under 3.5) averaged about 60. Same questions, same time. The high scorers simply kept going and built the answer out with a reason and a specific example. If your score is stuck, the fastest improvement is usually to stop ending early.
What the data actually showed
We analyzed 3,324 interview answers across 1,107 practice tests. For each answer we have the score plus measures like word count and speaking pace. The pattern was consistent and strong.
The score tracked how much people said and how steadily they said it. Word count was the single biggest correlate with the score. Speaking pace and words per minute came next. The proportion of time spent in silence pulled the score down. Here is the contrast between the top and bottom groups.
Here is the part that surprises people. Measures of grammar and vocabulary did not separate the high group from the low group. Both groups scored about the same on those. That does not mean grammar has no value. The official ETS rubric does reward accurate grammar and a good range of vocabulary at the top band, so keep building those. It means that among real test-takers at this level, grammar was not the thing deciding who scored well and who did not. Answer length and structure were.
A quick, honest note on the numbers. These scores come from the My Speaking Score AI scorer, not from ETS directly. We use them to find patterns. The advice below is grounded in the published ETS "Take an Interview" rubric, which rewards a response that is on topic, well elaborated, and delivered at a good conversational pace.
Why saying more actually works
The interview task is not testing whether you can give a correct one-line opinion. It is testing whether you can hold a short, fluent, organized stretch of speech. The rubric is explicit about this. A top answer is described as on topic and well elaborated, with a good pace and natural pauses. A weaker answer is described as on topic but with limited elaboration, a choppy pace, and frequent fillers.
Read that again. The difference the rubric draws between a strong answer and a weak one is elaboration and flow, not accuracy. When you stop after one sentence, you have handed the scorer almost nothing to reward. When you keep going with a reason and an example, you give the rubric everything it is looking for.
The structure that scores
The good news is that the high-scoring answers in our data were not improvised genius. They followed the same simple shape, over and over. You can copy it.
The single most powerful move on that list is step three. The specific example is what separated almost every strong answer from every weak one in our data. Vague answers stay vague because they never land on anything concrete. A named drama, a real time, an actual place. That detail forces you to keep talking, and it gives the answer something real to be about.
Hear the difference
Here are two real answers to the same question: "How do you usually choose what kind of entertainment to enjoy?" Both speakers have workable English. One scored about a 5. One scored about a 2.9.
The high answer: "I usually choose entertainment based on my preference and cultural perspective. For example, I like a certain type of actor and singer, so I search on YouTube, TikTok, and Instagram. I watch their videos because they show a lot of their personality, and I look for concerts because when I am there I can feel the mood and interact directly."
The low answer: "I enjoy podcasts because it is practical, convenient, and cost effective. For example, every day when I am commuting I listen to a podcast. TED Talks is my favorite. I really..."
The low answer is not wrong. It is just too short, and it stops before it builds anything. The speaker had more to give and ran out of runway. That is the most common way a capable person caps their own score.
How to practice this, concretely
Do not practice by telling yourself to "speak more." That never works in the moment. Practice these specific behaviors instead.
Answer the question in your very first sentence, before you think about reasons. This stops the slow, vague warm-up that eats your time.
Force one concrete example into every answer, and make it real. Use an actual name, number, or place. If you cannot think of a true one, invent a plausible specific. "My friend Lina" beats "my friend." "Last March" beats "one time."
Record yourself and check whether you are still talking at the 30-second mark. If you finish early and often, length is your ceiling, and now you know it.
See your own numbers
If you want to know whether short answers are quietly capping your score, the fastest way is to look at your own data. Take a free practice test on My Speaking Score and check two things: how many words you produced per answer, and where your pace dropped. If your answers are landing near 60 words while the strong ones land near 100, you have found the single highest-value thing to work on, and you did not have to guess.
FAQ
How long should a TOEFL Speaking interview answer be?There is no official word count, but in our data the strongest answers ran around 90 to 130 words and used most of the response time. Aim to keep building until you have given a reason and a specific example, rather than stopping after one sentence.
Is it bad to speak fast on TOEFL Speaking?A natural, steady pace helps. High scorers in our data spoke faster on average (around 131 words per minute) than low scorers (around 81), but that came from talking in full thoughts, not from rushing. Clear and continuous beats fast and panicked.
Does grammar matter for TOEFL Speaking?Yes, the ETS rubric rewards accurate grammar and a good range of vocabulary at the top band. But in our data, grammar and vocabulary measures did not separate high scorers from low scorers at this level. Length and structure did. Fix the structure first, then refine the grammar.
What is the most common TOEFL Speaking mistake?Ending the answer too early. A short, vague response gives the scorer almost nothing to reward, even when the English is correct.
Can I use a memorized template for the interview task?Be careful. A rigid memorized script can sound unnatural and, if it is reused word for word, it can be flagged by automated similarity checks. Learn a flexible structure instead, then fill it with real, specific content for each question.
How do I stop running out of things to say?Add a concrete example every time. A specific detail, a name, a number, or a moment naturally pulls more words out of you and keeps the answer moving.
The takeaway
If your English is solid but your TOEFL Speaking score is stuck, the problem is probably not hiding in your grammar. You are likely ending your answers too early and leaving them shapeless. Answer first, give a reason, add one real example, build it out, and wrap. Say more, in order. The data is clear that this is what the strong answers do, and it is something you can start doing tomorrow.
Happy practicing.