Mixed Dominant (Cross Dominant)
Mixed dominance — also called cross dominance — is when a person doesn’t develop one consistent dominant side of the body. They might write with the right hand but kick with the left foot, or favor the right hand and the left eye. On its own it’s a physical quirk. For some children, though, it travels alongside real learning struggles — and understanding the connection helps parents know what to do about it.
What is mixed dominance?
Most people develop a dominant side. If you’re right-handed, you probably do nearly everything with your right hand — write, brush your teeth, eat. You likely favor your right eye at a telescope, turn your right ear toward a faint sound, and kick with your right foot. That one-sidedness is a sign of an efficiently organized brain: dominance develops because it streamlines the work.
A cross dominant person’s preferences are split. Common patterns include:
- Writing with one hand but eating, throwing, or kicking with the other
- A dominant hand on one side and a dominant eye (or ear, or foot) on the other
- Switching sides depending on the task
The simplest way to understand mixed dominance is as a dominant side that never fully established itself — which is different from being ambidextrous. An ambidextrous person developed a dominant side first and then built the other side up to match. A cross dominant person’s dominance never consolidated in the first place.
As children develop, one brain hemisphere typically takes the lead for motor activities. When that specialization is less clear, communication between the hemispheres tends to be less efficient — and researchers have long been interested in what that means for learning.
What the research shows
The most cited evidence comes from a large 2010 study in Pediatrics, which followed nearly 8,000 children and found that mixed-handed children were more likely than right- or left-handed peers to have language difficulties, scholastic problems, and ADHD-type symptoms — with the pattern persisting into adolescence.
Two things matter about how to read this research:
It’s a correlation, not a verdict
Mixed dominance doesn’t cause a learning disability, and plenty of cross dominant children learn without difficulty. What the research suggests is that mixed dominance and learning struggles sometimes share underlying roots — in how efficiently the two hemispheres coordinate — so a cross dominant child who is struggling deserves a closer look at the foundational skills underneath.
The proposed mechanism is about connection, not damage
Researchers have theorized that when the hemispheres coordinate less efficiently, information that has to cross between them gets processed more slowly. Reading is a prime example: sound processing and meaning-making draw on networks across both hemispheres, so weak coordination taxes exactly the pipeline reading depends on. Think of a well-organized filing cabinet versus a scattered one — the scattered cabinet holds the same files, but every retrieval takes longer. When retrieval is slow and effortful across a school day, learning becomes a struggle, and the struggle often gets labeled: dyslexia when it lands on reading, dyscalculia when it lands on math, dysgraphia when it lands on writing.
What parents notice
Signs of mixed dominance
Parents usually spot the pattern in small, odd details.
A simple home check for eye dominance
Have your child point at a distant object with both eyes open, then close one eye at a time. The eye that keeps the finger lined up with the object is the dominant one. Compare against their writing hand, kicking foot, and the ear they turn toward quiet sounds.
How mixed dominance shows up in schoolwork
When hemispheric coordination is inefficient, the strain lands on the processing skills that schoolwork depends on.
Reading
Inconsistent eye dominance strains visual tracking and letter recognition — losing the place mid-line, guessing at words, confusing similar letters. And when a child reads the board with one dominant eye while listening to the teacher with the opposite dominant ear, the brain works overtime to sync two streams arriving on opposite sides.
Language & spelling
Weak coordination taxes auditory processing — telling similar sounds apart, holding a sequence of sounds long enough to spell it.
Math
Spatial reasoning and number sense both lean on visual-spatial processing that suffers when the hemispheres coordinate poorly.
Writing
The eye-brain-hand pipeline is the longest coordination chain in schoolwork, which is why handwriting is often where mixed dominance is most visible.
Everything at once
Slow cross-hemisphere communication reads, from the outside, like slow processing speed and taxed working memory — the child who “knows it but takes forever.”
The encouraging part
What to do for a cross dominant child
The brain systems involved respond to training at any age — that’s neuroplasticity — and the exercises are simple enough to do at the kitchen table.
Don’t force a side
The goal was never to make a child pick a hand. Forcing handedness builds frustration, not integration. The goal is strengthening the connection between the hemispheres so that whatever their dominance pattern, information moves efficiently.
Use cross-lateral movement
Motions that cross the body’s midline — touching the opposite knee, cross-body clapping games, certain crawling and marching patterns — exercise exactly the hemisphere-to-hemisphere coordination that mixed dominance strains. Practitioners have used cross-lateral and proprioceptive exercises for decades for this purpose; they build the body-map and bilateral coordination that sit underneath focus, handwriting, and midline tasks.
Strengthen the processing skills that took the strain
Cross dominance rarely needs to be “fixed” directly — what needs building are the cognitive micro-skills that inefficient coordination left underdeveloped: visual tracking, auditory discrimination, spatial awareness, working memory. Short daily practice at the right difficulty is how those circuits strengthen.
Watch for the strengths
A brain organized differently is organized differently in both directions. Cross dominant children often show unusual flexibility, creativity, or athletic and artistic patterns their one-sided peers don’t. Build the weak links; enjoy the unusual wiring.
How Learning Success helps
The Learning Success System was built for exactly this kind of child: struggles that trace to foundational skills rather than intelligence or effort. The system includes an extensive library of cross-lateral and proprioceptive exercises alongside visual, auditory, and memory training — and it starts with a 45-minute assessment that maps your child’s profile across 440+ data points, so you’re building the specific skills your child needs rather than guessing. Your child’s Learning Roadmap arrives within 48 hours and lays out the plan: 15 minutes a day, with you as the coach.
Build the skills underneath, one 15-minute session at a time
A 45-minute assessment maps your child’s profile across 440+ data points; your Learning Roadmap arrives within 48 hours with the specific skills to build — guided daily, with you as the coach.
- Cross-lateral & proprioceptive exercise library
- Visual, auditory & memory training
- A personalized plan — 15 minutes a day
$0 today · Roadmap within 48 hours · Keep it even if you cancel
Common questions
Is mixed dominance a learning disability?
Is cross dominance the same as being ambidextrous?
Should I train my child to use one hand?
Does mixed dominance go away?
Rodriguez, A., et al. (2010). Mixed-Handedness Is Linked to Mental Health Problems in Children and Adolescents. Pediatrics, 125(2). publications.aap.org
Leisman, G., & Melillo, R. (2010). Effects of motor sequence training on interhemispheric connectivity. pubmed.ncbi.nlm.nih.gov
Build the skills underneath the struggle
The Learning Success System develops the foundational processing skills this page describes — through short daily exercises, guided by your child’s Learning Roadmap. Start with a free 45-minute assessment; the Roadmap arrives within 48 hours and shows exactly which skills your child needs and where to begin. All three programs, every bonus module, one membership. Fifteen minutes a day, with you as the coach.
Start My Free Trial → Choose Monthly or Yearly$0 today · Roadmap within 48 hours · Keep it even if you cancel
Want the full details first? See everything in the All Access Membership →
The one email in your inbox that gets it
You don’t need another newsletter full of jargon and worry. The Learning Success Weekly Blueprint speaks parent-to-parent, grounded in the science — reassuring, practical, and short enough to read with your coffee. If your child guesses at words, melts down over math, or fights every worksheet, each issue hands you one thing to try that week.
Subscribe free