When a Child Knows a Skill but Doesn’t Use It: Understanding Skill Generalisation in ABA Therapy
A child may successfully learn a skill during therapy but not use that same skill at home, school, or in a different social situation. For parents and caregivers, this can raise an important question: If my child has learned the skill, why aren't they using it outside therapy?
One possible explanation is skill generalisation.
In behavioural and developmental intervention research, generalisation refers to the ability to use a learned skill beyond the specific conditions in which it was initially taught. This may involve using the skill with different people, in different settings, with different materials, or during different activities. Generalisation is important because a skill that occurs only in a highly structured teaching environment may have limited practical value in everyday life.
For children receiving ABA Therapy, therefore, learning a skill is only one part of the process. Supporting the child in using that skill flexibly across meaningful everyday situations can also be an important intervention consideration.
What Is Skill Generalisation?
Consider a simple example.
A child is learning to request help. During an ABA Therapy session, the therapist presents a task the child cannot complete independently. After appropriate teaching and prompting, the child says, "Help please."
The child can consistently make the request during therapy.
Later, however, the child struggles to open a container at home and becomes frustrated instead of asking for help.
This does not necessarily mean the child has "forgotten" the skill.
The child may have learned the response under a particular set of conditions but may not yet be using it when the person, environment, activity, materials, or cues change.
Research describes generalisation in terms of applying learned behaviours across different people, settings, behaviours, and/or time.
Learning a Skill and Generalising a Skill Are Different
A useful distinction is between skill acquisition and skill generalisation.
Skill acquisition
This refers to learning the target skill itself.
For example:
A child learns to request a preferred item using words, gestures, or an appropriate communication system.
Skill generalisation
This refers to using that skill beyond the original teaching conditions.
For example:
The child uses the same communication skill with a parent at home, a teacher at school, and a therapist during a different activity.
A child may therefore demonstrate strong performance during structured teaching while still requiring support to use the skill more broadly.
This is one reason that intervention outcomes should not be understood solely from performance during the teaching session.
Does Autism Automatically Mean a Child Cannot Generalise?
This is an important distinction.
It is common to hear that autistic children have an inherent or universal difficulty with generalisation. However, research does not support such a simple conclusion.
A systematic review of randomised controlled trials involving early social-communication interventions for young autistic children found that eight of nine studies demonstrated at least some successful generalisation across people, settings, and/or activities. At the same time, generalisation was not consistent across every skill or context.
This suggests a more useful way of thinking about generalisation:
The question is not simply whether a child can generalise. It is how, when, and under what conditions a particular skill generalises.
That distinction matters when planning intervention.
Why Might a Skill Not Transfer to a New Situation?
Generalisation can be affected by many factors.
A therapy session may have predictable materials, familiar instructions, a consistent therapist, and carefully controlled teaching conditions.
Everyday life is different.
A child may encounter:
A different adult
A new location
Different materials
Background noise or distractions
A different activity
A change in routine
Less prompting
Different expectations
For example, a child may know how to follow a particular instruction when it is delivered by their therapist but not respond in the same way when a teacher gives a similar instruction during a busy classroom activity.
The skill itself may not be absent. The child may simply need opportunities to learn that the skill is relevant across these changing conditions.
How Can Generalisation Be Supported During ABA Therapy?
Generalisation does not necessarily happen automatically once a child reaches mastery during teaching.
Behavioural literature has long discussed the importance of programming for generalisation rather than simply hoping that it will occur. Stokes and Baer identified approaches including training across diverse examples, using naturally occurring reinforcement, and incorporating common elements between teaching and generalisation environments. These principles continue to inform discussions of generalisation in intervention research.
1. Teach Across Different Examples
If a child learns a skill using one particular toy, object, instruction, or activity, therapists can consider whether the skill also occurs with other relevant examples.
For instance, if a child is learning to identify an object, teaching with several appropriate examples can help avoid making the skill overly dependent on one specific item.
Research on family-mediated social-communication interventions has reported the use of multiple stimulus and response exemplars as one strategy for promoting generalisation.
2. Vary People and Environments
A skill may need to be practised with more than one person and in more than one appropriate setting.
Depending on the child's programme, this could involve opportunities with:
Parents
Therapists
Teachers
Caregivers
Peers
It may also involve different relevant environments such as the therapy centre, home, school, or community.
The systematic review by Carruthers and colleagues found that generalisation was frequently examined across people and, in some studies, across settings and activities.
3. Use Natural Reinforcement Where Appropriate
Sometimes the most meaningful consequence for using a skill is what naturally happens after the skill.
For example, if a child appropriately requests a toy, receiving access to the toy may provide a naturally relevant outcome.
Research examining generalisation strategies in family-mediated interventions has reported the use of natural contingencies and natural reinforcement as part of generalisation programming.
4. Gradually Reduce Prompts
A child may initially need verbal, visual, gestural, or other prompts to demonstrate a skill.
The longer-term objective may be for the child to use the skill with less assistance when appropriate.
For example:
Prompted:
"Tell me what you need."
Less prompted:
"What do you need?"
Independent:
The child recognises the situation and communicates the need without a prompt.
The specific prompting and fading approach should be individualised according to the child's goals and treatment plan.
Parents Can Help Create Generalisation Opportunities
Generalisation does not have to happen only during therapy.
Parents and caregivers can provide natural opportunities for children to practise skills during everyday routines.
For example, a child working on communication may have opportunities to practise requesting during:
Mealtimes
Play
Getting dressed
Family activities
Community outings
School preparation
The goal is not to turn every family interaction into a therapy session. Instead, everyday situations can provide meaningful opportunities for the child to use skills they are learning.
Research on family-mediated interventions has highlighted the role of parents and other familiar people as potential mediators in supporting generalisation.
What If a Child Performs the Skill in Therapy but Not at Home?
This is where careful observation can be particularly useful.
Rather than simply concluding that the child "doesn't know the skill," the therapy team can consider:
Where does the skill occur?
Does it happen only in the therapy centre?
Who is present?
Does the child respond only to a particular therapist?
What materials are being used?
Does changing the object affect performance?
What prompts are required?
Does the child need assistance that may not be available in everyday situations?
What happens after the skill is used?
Is there a meaningful consequence for using the skill?
Looking at these variables can help therapists understand where generalisation is already occurring and where additional programming may be useful.
Generalisation Should Be Measured, Not Assumed
Research also highlights an important issue: generalisation needs to be assessed directly.
A 2022 scoping review of ABA research involving children and youth with autism found that only about 31% of the included study records reported some measure of generalisation.
This matters because improvement during the teaching condition does not automatically tell us whether the skill will occur elsewhere.
Ideally, intervention planning considers:
What exact skill is being taught?
Under what conditions is it being taught?
Where else should the skill occur?
With whom should the child use it?
How will generalisation be measured?
How will independence and maintenance be monitored?
This creates a clearer picture of whether learning is translating into everyday functioning.
Generalisation Is Not the Same as "Doing Everything Everywhere"
It is also important to set realistic expectations.
A child does not necessarily need to perform a skill identically in every possible situation.
Generalisation should be considered in relation to the functional goal of the skill.
For example, the goal may be for a child to communicate when they need help across the important environments in their daily life. The exact words, materials, people, and circumstances may naturally vary.
The purpose is meaningful and functional use—not simply reproducing a therapy exercise in multiple locations.
From Therapy Skills to Everyday Skills
The ultimate value of many learned skills comes from how they support a child's participation in everyday life.
A child may learn to communicate a need, follow instructions, participate in play, complete a routine, or respond to social cues during structured teaching. Supporting that learning across relevant people, places, and activities can help connect intervention with real-world experiences.
Research suggests that generalisation can occur, but it is not necessarily consistent across every skill or context. This is why individualised planning, varied practice opportunities, involvement of caregivers and other important people, and direct measurement can all be relevant when supporting generalisation.
At Be Me Services, an individualised approach to ABA Therapy can consider the child's specific learning goals and the environments in which those skills are expected to be used. The focus should extend beyond whether a child can perform a skill during a structured session to understanding how that skill can become meaningful within everyday routines and relationships.
If your child demonstrates a skill during therapy but has difficulty using it in other situations, discussing these observations with the child's therapy team can help identify where additional generalisation opportunities may be appropriate.