Early Start Denver Model vs. ABA: Key Differences

Michael Mohan

May 28, 2025

Wondering about therapy options? Compare Early Start Denver Model vs. ABA to understand their unique styles and benefits.

When your child receives an autism spectrum disorder (ASD) diagnosis, one of the most important decisions you’ll face is choosing the right intervention approach. Two evidence-based therapies frequently recommended for young children with autism are Applied Behavior Analysis (ABA) and the Early Start Denver Model (ESDM). While both have shown significant success in supporting child development, they differ substantially in methodology, philosophy, and implementation.

Understanding these differences is crucial for making an informed decision that best serves your child’s unique needs. This comprehensive guide explores the key distinctions between ESDM and ABA, helping you navigate this important choice with confidence.

What is Applied Behavior Analysis (ABA)?

Applied Behavior Analysis is a scientific approach to understanding and changing behavior based on the principles of learning theory. Developed in the 1960s by Dr. Ivar Lovaas, ABA focuses on increasing desired behaviors while reducing problematic ones through systematic reinforcement strategies.

Core Principles of ABA

ABA operates on several fundamental principles:

Positive Reinforcement: Rewarding desired behaviors to increase their frequency
Data Collection: Systematic tracking of behaviors and progress
Task Analysis: Breaking complex skills into smaller, manageable steps
Generalization: Ensuring skills learned in one setting transfer to others
Maintenance: Helping children retain learned skills over time

ABA Implementation Structure

Traditional ABA therapy typically involves:

Intensive Hours: Often 25-40 hours per week for optimal results
Discrete Trial Training (DTT): Structured, repetitive teaching sessions
1:1 Instruction: Individual sessions with trained therapists
Structured Environment: Controlled settings to minimize distractions
Measurable Goals: Specific, quantifiable objectives

Research indicates that children receiving intensive ABA intervention show significant improvements. A landmark study found that 47% of children who received intensive ABA therapy achieved normal intellectual and educational functioning, compared to only 2% in the control group.

What is the Early Start Denver Model (ESDM)?

The Early Start Denver Model, developed by Dr. Sally Rogers and Dr. Geraldine Dawson in the early 2000s, represents a developmental, relationship-based approach to autism intervention. ESDM specifically targets children between 12 and 48 months old, focusing on the critical early developmental period.

Core Philosophy of ESDM

ESDM is built on several key principles:

Developmental Approach: Following natural developmental sequences
Relationship-Based: Emphasizing positive social interactions
Play-Based Learning: Using natural play as the primary teaching vehicle
Joint Attention: Building shared focus and social engagement
Affect Sharing: Developing emotional connections and communication

ESDM Implementation Characteristics

ESDM intervention typically includes:

Flexible Intensity: 15-25 hours per week, adaptable to family needs
Natural Environment Teaching: Learning through everyday activities and play
Parent Involvement: Extensive coaching for family members
Interdisciplinary Team: Collaboration between various specialists
Holistic Development: Addressing multiple developmental domains simultaneously

Studies show that children receiving ESDM intervention demonstrate significant improvements in IQ, language skills, and adaptive behavior. Research published in Pediatrics found that toddlers receiving ESDM showed an average IQ increase of 17.6 points compared to 7.0 points in the control group.

Key Differences Between ESDM and ABA

1. Philosophical Approach

ABA Focus: Behavior modification through systematic reinforcement and consequence management. The primary goal is to increase appropriate behaviors while decreasing problematic ones.

ESDM Focus: Developmental relationship-building through natural social interactions. The emphasis is on fostering intrinsic motivation and social engagement.

2. Teaching Methodology

ABA Methodology:

Highly structured discrete trial training
Adult-directed learning sessions
Repetitive practice of specific skills
Clear antecedent-behavior-consequence sequences

ESDM Methodology:

Child-initiated, play-based activities
Following the child’s interests and motivation
Embedded learning opportunities within natural routines
Flexible, responsive teaching moments

3. Learning Environment

ABA Environment:

Controlled, distraction-free settings
Structured table-top activities
Predetermined lesson plans
Consistent physical setup

ESDM Environment:

Natural home and community settings
Play-based, interactive spaces
Flexible, child-responsive environments
Integration with daily routines

4. Intensity and Duration

ABA Intensity:

Typically 25-40 hours per week
Year-round programming
Long-term intervention (often several years)
High-intensity model based on Lovaas research

ESDM Intensity:

Generally 15-25 hours per week
Flexible scheduling based on family needs
Early intervention focus (12-48 months)
Adaptable intensity levels

5. Family Involvement

ABA Family Role:

Parents often observe sessions
Training provided for implementing programs at home
Consultation on behavior management strategies
Regular progress meetings

ESDM Family Role:

Parents are active co-therapists
Extensive parent coaching and training
Integration of strategies into daily family life
Emphasis on family-centered practices

6. Skill Development Focus

ABA Skill Development:

Academic and pre-academic skills
Compliance and following instructions
Discrete, measurable behaviors
Systematic skill acquisition

ESDM Skill Development:

Social communication and engagement
Joint attention and shared enjoyment
Spontaneous language development
Holistic developmental progress

Research Evidence and Outcomes

ABA Research Findings

Extensive research supports ABA effectiveness:

Children receiving intensive ABA show significant improvements in IQ scores (average gain of 20+ points)
89% of children demonstrate substantial behavioral improvements
Long-term studies indicate maintained gains into adulthood
Meta-analyses consistently show large effect sizes for ABA interventions

ESDM Research Findings

Growing research base demonstrates ESDM effectiveness:

Randomized controlled trials show significant improvements in cognitive abilities
Children demonstrate enhanced social communication skills
Brain imaging studies reveal increased neural activity in social brain regions
Parent-implemented ESDM shows promising results with lower intensity

Comparative Research

Direct comparison studies suggest:

Both approaches yield significant improvements over standard care
ESDM may show stronger gains in social communication domains
ABA may demonstrate greater improvements in structured skill acquisition
Individual child characteristics may predict better response to specific approaches

Choosing the Right Approach for Your Child

Consider Your Child’s Profile

ABA may be ideal if your child:

Responds well to structured activities
Shows strong learning through repetition
Benefits from clear, consistent routines
Has specific behavioral challenges to address
Is comfortable with adult-directed activities

ESDM may be ideal if your child:

Shows natural motivation for social interaction
Engages readily in play-based activities
Demonstrates joint attention skills
Responds positively to child-led activities
Has strong family support and involvement capacity

Family Considerations

Practical Factors to Evaluate:

Available time for intervention participation
Financial resources and insurance coverage
Geographic accessibility of qualified providers
Family philosophy regarding child development
Sibling and family dynamic considerations

Professional Guidance

Working with qualified professionals is essential:

Board Certified Behavior Analysts (BCBAs) for ABA programs
ESDM-certified therapists for Denver Model implementation
Developmental pediatricians for comprehensive assessment
Early intervention teams for coordinated care planning

Integration and Hybrid Approaches

Many families and professionals recognize that elements from both approaches can be valuable. Some considerations for integration include:

Complementary Strategies

Using ABA for specific skill acquisition while maintaining ESDM’s relationship focus
Implementing structured teaching within natural, play-based contexts
Combining data collection with developmental observation
Balancing adult-directed and child-initiated activities

Sequential Implementation

Some families choose to:

Begin with ESDM during toddler years (12-36 months)
Transition to ABA for preschool preparation (3-5 years)
Maintain relationship-based principles throughout intervention
Adapt approaches based on developmental progress

Cost and Accessibility Considerations

Financial Investment

ABA Costs:

Typically $40,000-$60,000 annually for intensive programs
Often covered by health insurance following autism diagnosis
May require significant out-of-pocket expenses for comprehensive programming

ESDM Costs:

Generally $25,000-$40,000 annually
Growing insurance recognition and coverage
Parent training components may reduce long-term costs

Provider Availability

Finding qualified providers remains challenging for both approaches:

ABA providers are more widely available but demand often exceeds supply
ESDM-certified therapists are less common but growing in number
Rural and underserved areas face particular shortages
Waiting lists are common for both intervention types

Making Your Decision

Key Questions to Ask

What does your child’s comprehensive evaluation suggest about their learning style?
What are your family’s values regarding child development and intervention?
What resources and support systems are available in your community?
How does your child respond to different types of social interaction?
What are your long-term goals for your child’s development?

Professional Consultation

Before making your decision:

Consult with your child’s diagnostic team
Observe both intervention approaches if possible
Speak with other families who have experience with each method
Consider your child’s individual strengths and challenges
Evaluate your family’s capacity for implementation

Conclusion

Both the Early Start Denver Model and Applied Behavior Analysis represent evidence-based, effective interventions for children with autism spectrum disorder. The choice between them should be based on your child’s individual profile, your family’s values and resources, and the quality of available providers in your area.

Remember that no single approach is universally superior – the best intervention is the one that fits your child’s unique needs and your family’s circumstances. Many children benefit from elements of both approaches, and flexibility in implementation often yields the best outcomes.

Early intervention remains crucial regardless of which approach you choose. The most important step is beginning appropriate intervention as soon as possible after diagnosis, working with qualified professionals who can guide you through this important journey.

As research continues to evolve, new insights will undoubtedly emerge about optimizing interventions for children with autism. Stay informed, maintain open communication with your intervention team, and remember that you are your child’s best advocate in this process.

References

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