Emotional Development Stages by Age: What the Research Says

Emotional development unfolds in predictable
stages across childhood and adolescence —
with each stage building on the foundations
of the previous one and preparing the
child for the emotional challenges of
the next. Research on emotional development
stages provides specific, evidence-based
insight into what is typical at each
age — what emotional capacities are
developing, what challenges are characteristic,
and what parents can specifically do
to support development at each stage.

This article covers what the research
shows about emotional development
stages by age — from birth through
adolescence — what to expect, what
supports development, and what parents
can specifically do.

Why Understanding Emotional
Development Stages Matters

Research on emotional development
and parenting finds several specific
reasons why understanding developmental
stages is practically important:

Stage-appropriate expectations
reduce conflict. Research finds
that parents with accurate developmental
expectations — who understand
what is typical at each age —
show significantly less conflict
with their children than those
who expect emotional capacities
the child has not yet developed.

Stage-appropriate support is
most effective. Research finds
that emotional development support
matched to the child’s developmental
stage — rather than ahead of
or behind it — produces significantly
better developmental outcomes.

Understanding stages reduces
parental anxiety. Research
finds that parents who understand
that their child’s emotional
behavior is developmentally
normal — rather than a sign
of a problem — show significantly
less parenting anxiety and
significantly more effective responses.

Birth to Six Months —
Basic Emotional Expression

Research on emotional development
in the first six months finds:

What is developing:
Basic emotions — happiness,
distress, interest, surprise —
are present from birth.
Social smiling emerges at
approximately six weeks —
the first genuine positive
social emotional expression.
The infant is beginning to
distinguish pleasant from unpleasant
emotional experiences.
Emotional communication is
primarily through facial expression,
vocalization, and body movement.

What is typical:
Crying as the primary means
of communicating distress.
Smiling and cooing in response
to pleasant social interaction.
Quieting in response to caregiver comfort.

What parents can do:
Respond consistently and warmly
to all emotional communications.
Make warm eye contact and
engage in face-to-face interaction.
Comfort distress promptly and consistently.

Six to Twelve Months —
Emotional Awareness Expands

Research on emotional development
between six and twelve months finds:

What is developing:
Fear and wariness — emerging
at approximately eight months —
in response to strangers and novel situations.
Social referencing — using
the caregiver’s emotional expression
to guide responses to novel situations — from approximately nine months.
More differentiated emotional
expression — distinguishing
anger, sadness, fear, and joy more clearly.
Beginning emotional regulation —
through caregiver co-regulation.

What is typical:
Stranger anxiety — distress
in the presence of unfamiliar people.
Separation anxiety — distress
when separated from the primary caregiver.
Using the caregiver’s face
to decide how to respond to
new situations and new people.

What parents can do:
Respond warmly to stranger
anxiety — not forcing social interaction.
Handle separations warmly
and consistently.
Provide a calm, regulated
presence during novel and
potentially frightening situations.

One to Two Years —
The Emotional Toddler

Research on emotional development
between one and two years finds:

What is developing:
Vocabulary for emotions begins —
“happy,” “sad,” “mad,” “scared.”
Self-conscious emotions emerge —
pride, shame, embarrassment —
requiring self-awareness.
Empathic responses to others’
distress — attempting to comfort
upset others.
Separation anxiety peaks —
reflecting the emotional intensity
of the attachment relationship.
Emotional regulation remains
very limited — with frequent
emotional outbursts.

What is typical:
Significant emotional intensity —
big feelings with limited capacity to manage them.
Frequent distress at separation from the caregiver.
Empathic responses — hugging
or offering comfort to upset others.
Beginning to use words to
express emotions — though inconsistently.

What parents can do:
Name and validate emotions consistently.
Respond warmly to separation anxiety.
Celebrate empathic behavior —
“You gave [friend] a hug because they were sad.”
Maintain warm consistent co-regulation during distress.
Begin teaching simple emotion words.

Two to Three Years —
Big Feelings and Limited Regulation

Research on emotional development
between two and three years finds:

What is developing:
Rapidly expanding emotional vocabulary.
Better understanding of emotional
causes — “I’m sad because [reason].”
Beginning — but still very
limited — emotional regulation.
More sophisticated empathy.
Self-conscious emotions more developed —
pride, shame, guilt.
Theory of mind beginning —
early understanding that others
have different feelings.

What is typical:
Tantrums — reflecting the
mismatch between emotional
intensity and regulation capacity.
Research finds tantrums developmentally
normal between two and three —
peaking at approximately two
and a half years.
Intense emotional reactions
to frustration, disappointment, and transitions.
Beginning to use language
to express emotions — though
still frequently overwhelmed.

What parents can do:
Stay calm during tantrums —
co-regulate rather than escalate.
Name and validate emotions —
even during intense episodes.
After the episode — briefly
and warmly discuss what happened.
Teach simple calming strategies —
deep breaths, hugging a comfort object.
Maintain consistent warm limits.

Three to Five Years —
Emotional Understanding Grows

Research on emotional development
between three and five years finds:

What is developing:
Theory of mind develops —
understanding that others have
different thoughts and feelings —
enabling more sophisticated emotional understanding.
Understanding of mixed emotions begins —
feeling happy and sad at the same time.
Better understanding of how
emotions can be managed.
More sophisticated empathy —
responding more specifically to others’ needs.
Better — though still developing — emotional regulation.
Understanding that emotions
have causes and consequences.

What is typical:
More sophisticated emotional
conversations — able to discuss
feelings more elaborately.
Beginning to manage emotions
more effectively — though
still frequently overwhelmed.
More sophisticated empathic responses.
Occasional lying — reflecting
the developing understanding
that others have different
thoughts and feelings — and
that these can be manipulated.

What parents can do:
Engage in more sophisticated
emotion conversations.
Ask perspective-taking questions —
“How do you think [friend] felt?”
Introduce more complex emotion
words — frustrated, disappointed,
nervous, proud, embarrassed.
Practice simple regulation
strategies together — in calm moments.
Read books with complex emotional themes.

Six to Eight Years —
Emotional Competence Develops

Research on emotional development
between six and eight years finds:

What is developing:
Understanding of mixed and
complex emotions — feeling
proud and nervous at the same time.
Better emotional regulation —
using strategies to manage
emotions more effectively.
Understanding that emotions
can be hidden — that one can
feel one thing and show another.
More sophisticated empathy —
including empathy for those
in very different circumstances.
Understanding of emotional
display rules — when it is
appropriate to express emotions and when not.

What is typical:
More effective emotional regulation —
though still developing.
More sophisticated emotional
conversations — able to discuss
complex emotional situations.
Beginning to hide or mask
emotions in social contexts —
“I didn’t want my friends
to see me cry.”
More nuanced empathy.

What parents can do:
Engage in genuine emotional
conversations about complex situations.
Discuss emotional display rules —
when and how to express emotions appropriately.
Continue emotion coaching.
Acknowledge and validate hidden
emotions — “Sometimes we feel
things we don’t show — and
that’s okay.”

Eight to Twelve Years —
Emotional Sophistication Grows

Research on emotional development
between eight and twelve years finds:

What is developing:
Increasingly sophisticated emotional regulation.
Better understanding of the
social aspects of emotion —
how emotions affect relationships.
More nuanced understanding
of others’ emotions — including
the emotions of people in
very different circumstances.
Beginning of the emotional
intensity of adolescence —
as puberty approaches.
More sophisticated moral emotions —
guilt, shame, pride — linked
to internalized values.

What is typical:
Generally more stable emotional
regulation than earlier childhood.
More sophisticated emotional
self-awareness.
Beginning of increased emotional
intensity as puberty approaches —
particularly in girls.
More sophisticated empathy
and perspective-taking.

What parents can do:
Maintain warm open communication about emotional experiences.
Acknowledge the increasing
emotional intensity of approaching adolescence.
Continue emotion coaching —
at a more sophisticated level.
Discuss moral emotions —
guilt, pride, shame — and their relationship to values.

Adolescence — Emotional Intensity
and Identity

Research on emotional development
in adolescence finds:

What is developing:
Significant increase in emotional
intensity — driven by hormonal
changes and brain development.
Identity-related emotions —
emotions connected to developing sense of self.
More sophisticated empathy —
including global empathy for
people in distant circumstances.
Adult-like emotional complexity —
with the added intensity of
adolescent brain development.
Emotional regulation capacity
still developing — the prefrontal
cortex is not fully mature until the mid-twenties.

What is typical:
Intense emotional responses —
particularly to social situations.
Emotional volatility — significant
mood swings.
Strong emotional reactions
to perceived injustice and unfairness.
More emotional privacy —
sharing fewer emotions with parents.
Peer relationships as primary
emotional context.

What parents can do:
Maintain emotional availability —
even when adolescents are less forthcoming.
Respect emotional privacy —
while remaining genuinely available.
Respond to emotional intensity
with calm rather than matching escalation.
Continue to express unconditional warmth.
Seek professional support
if emotional difficulties are significantly impairing functioning.

Try This This Week

Practice 1 — The Stage Assessment
What it is: A deliberate honest
assessment of your child’s current
emotional development stage —
and whether your expectations
match their developmental reality.

How to do it: This week honestly assess:

What emotional capacities
is my child currently developing?
Are my expectations of their
emotional regulation appropriate
for their age and stage?
Am I responding to their emotional
behavior as developmentally
normal — or as a problem?

Adjust your expectations and
responses based on this assessment.

Why it works: Research on
parenting effectiveness consistently
finds that accurate developmental
expectations — matched to the
child’s actual stage — produce
significantly less conflict,
significantly more effective
responses, and significantly
better emotional development outcomes.

Practice 2 — The Stage-Appropriate Support
What it is: A deliberate implementation
of the most important emotional
development support for your
child’s specific current stage.

How to do it: Based on your
child’s stage — implement the
most important support:

Infant — consistent warm co-regulation.
Toddler — consistent emotion
naming and validation during tantrums.
Preschooler — perspective-taking
conversations and complex emotion words.
School age — sophisticated
emotion conversations and display rule discussions.
Adolescent — maintained emotional
availability and calm responses to intensity.

Why it works: Research on
emotional development support
consistently finds that stage-appropriate
support — matched to the child’s
actual developmental level —
produces significantly better
outcomes than generic support
that does not account for developmental stage.

Practice 3 — The Emotion Coaching Consistency
What it is: A deliberate commitment
to consistent emotion coaching —
the most important single parenting
practice for emotional development across all stages.

How to do it: This week — at
every significant emotional moment — practice:

Notice — name — validate — guide.
Hold this consistently —
for all emotions — positive and negative.
For all children — whatever their age.

Why it works: Research by
Gottman consistently finds that
emotion coaching — practiced
consistently across all stages —
produces the most significant
and most lasting emotional development benefits available.

The Bottom Line

Emotional development unfolds
in predictable stages — from
the newborn’s basic emotional
expressions to the adolescent’s
complex identity-related emotions —
with each stage building on
the previous one. Research
is clear: understanding what
is typical at each stage reduces
conflict and increases parenting
effectiveness; emotion coaching
is the most important single
support across all stages;
secure attachment is the foundation;
and consistent warm co-regulation
during distress is the mechanism
through which emotional regulation capacity develops.

Sources

Gottman, J. M., & DeClaire, J.
(1997). Raising an Emotionally
Intelligent Child. Simon & Schuster.

Izard, C. E. (2009).
Emotion theory and research.
Annual Review of Psychology,
60, 1–25.

Thompson, R. A. (2006).
The development of the person.
In W. Damon & R. M. Lerner (Eds.),
Handbook of Child Psychology. Wiley.

Harter, S. (1999).
The Construction of the Self.
Guilford Press.