“She talks non-stop at home—but at school, she barely says a word.”
For parents and teachers, this difference can be confusing.
A child may tell detailed stories, joke with siblings and constantly ask questions at home, yet become very quiet—or completely silent—the moment they enter the classroom.
Is the child simply shy? Could it be a language delay, selective mutism or autism?
The answer cannot be found by asking only:
“Does the child talk?”
A more useful question is:
“When, where, how and with whom does the child communicate?”
Looking at the whole pattern can help parents and professionals understand what may be happening.
1. Language Delay: Is Communication Difficult in Different Settings?
A child with a language delay or language disorder may have difficulty understanding or using language effectively.
For example, they may:
- Use fewer words than expected for their age
- Find it difficult to form sentences
- Struggle to answer questions
- Have trouble following instructions
- Find it hard to explain ideas or experiences
A child may talk more at home because the environment is familiar. However, a true language difficulty is generally noticeable across the languages and settings the child uses.
The American Speech-Language-Hearing Association explains that signs of a language disorder are expected to appear across a multilingual child’s languages rather than only in one language.
A speech-language assessment can help determine whether the child has difficulties with understanding language, expressing themselves or using language socially.
2. Selective Mutism: “I Can Talk, but I Can’t Talk Here”
Selective mutism looks different.
A child may speak freely and comfortably at home but consistently struggle to speak in particular social situations—most commonly at school.
Importantly, the child is not simply choosing to stay silent.
Selective mutism is recognised as an anxiety disorder. A child may know exactly what they want to say but feel unable to speak when anxiety becomes too strong.
Teachers may notice that the child:
- Freezes when asked a question
- Nods or points instead of speaking
- Whispers to one trusted person
- Speaks when only a few familiar people are present
- Talks normally at home but not at school
The strong difference between environments is an important clue.
Selective mutism also requires careful assessment because other factors—such as language ability and comfort with the language spoken at school—need to be considered.
3. Autism: Look Beyond How Much the Child Talks
Autism cannot be identified simply because a child is quiet at school.
Some autistic children speak very little, while others are extremely verbal.
Professionals look at a much broader developmental pattern involving social communication and interaction together with restricted or repetitive behaviours, interests or activities. The CDC explains the core characteristics considered in autism diagnosis here.
Questions may include:
- Can the child take part in back-and-forth conversations?
- Do they know how to join other children?
- How do they respond when another person changes the topic?
- Do they have difficulty understanding social situations?
- How do they cope with changes or unfamiliar situations?
- Are similar differences seen outside school?
A child can also have more than one area of need. For example, autism and anxiety can occur together, or an autistic child may also have language difficulties.
That is why one classroom observation is rarely enough to explain the whole picture.
Look at the Context, Not Just the Silence
Instead of documenting only:
“Did not speak today.”
look at what was happening around the child.
Ask:
- Who was present?
- Was the child expected to speak in front of a group?
- Did they speak to one familiar person?
- Did they communicate through gestures, writing or facial expressions?
- Was the question familiar or open-ended?
- Did communication change in a quieter environment?
These details can help parents, teachers and professionals see patterns that might otherwise be missed.
What About Multilingual Children in Hong Kong?
This is especially important in Hong Kong, where children may use Cantonese, English, Mandarin or other languages across home and school.
Speaking less in a newer or less familiar language does not automatically mean that a child has a language disorder or selective mutism.
Multilingualism itself does not cause speech or language disorders. ASHA advises parents that children can successfully learn more than one language and that families should continue using the languages they are most comfortable speaking.
Therefore, assessment should consider the child’s communication abilities across all the languages and environments they regularly use.
How Can ABA-VB Support Communication?
The first step should always be understanding why communication is difficult.
ABA-VB should not be used simply to pressure a child to speak. Selective mutism, for example, is anxiety-based and may require support from mental-health and speech-language professionals.
However, when an assessment identifies communication or social skills that need teaching, an individualised ABA-VB programme may support skills such as:
- Requesting help, information, items or breaks
- Answering and asking questions
- Initiating interactions
- Taking part in back-and-forth conversations
- Communicating with different people
- Developing social interaction skills
- Using learned communication skills across different settings
The goal is not simply “more talking.”
It is helping the child communicate more effectively and independently in everyday situations.
Silence Is a Clue—Not a Diagnosis
If a child talks freely at home but rarely speaks at school, avoid jumping immediately to one explanation.
Silence is something we can observe. It is not, by itself, a diagnosis.
Instead, look carefully at where, when, how and with whom the child communicates.
That information can help families determine whether the next step should involve a speech-language assessment, psychological support, developmental assessment or another type of professional help.
Not Sure What Your Child’s Communication Pattern Means?
If your child talks comfortably at home but struggles to communicate at school—or you have concerns about their language, social interaction or ability to use skills across different settings—Autism Recovery Network offers a FREE 30-minute parent consultation with an ARN Supervisor.
Parents can share what they are seeing at home and school, discuss their child’s current communication needs and learn more about possible next steps, including whether an individualised ABA-VB programme may be appropriate.
Talk with an ARN Supervisor — 30-minute parent consultation, free of charge.
