Fourteen Research-Backed Findings on the benefits of sleep training

Research Has Found That Behavioral Sleep Interventions May…

Help babies sleep longer stretches
Reduce night wakings
Improve parental sleep
Reduce maternal depression and parenting stress
Improve overall family well-being
Support more predictable bedtime routines
Show no evidence of harming attachment
Show no evidence of long-term emotional or behavioral harm
Increase parents’ confidence around sleep
Help families get the restorative sleep they need

Here are the most well-supported positive findings from the research on behavioral sleep interventions (the research term that includes sleep training methods).

Sleep Training Research: Positive Findings

Here are research-backed findings on sleep training:

1. Improved Infant Sleep

One of the strongest findings across dozens of studies.

Researchers consistently find that behavioral sleep interventions can:

Help babies fall asleep more easily
Reduce bedtime resistance
Reduce night wakings
Increase nighttime sleep duration

Supported by:

Mindell et al. (2006)
Gradisar et al. (2016)
Hiscock et al. (2008)

2. Longer Consolidated Sleep

Many babies begin sleeping in longer stretches after behavioral sleep interventions. Longer stretches of sleep allow babies to spend more time in restorative sleep cycles.

Supported by:

Gradisar et al.
Paul et al. (INSIGHT)

3. Improved Maternal Mental Health

This is one of my favorite findings because it’s often overlooked.

Researchers have found improvements in:

Maternal depression
Anxiety
Parenting stress
Overall well-being

Supported by:

Hiscock et al. (2008)
Hall et al. (2015)

4. Better Parental Sleep

Parents commonly experience:

More total sleep
Better sleep quality
Less fatigue

Better-rested parents often report feeling more patient and emotionally available.

5. Improved Family Functioning

Research has linked improved infant sleep with:

Less household stress
Better family routines
More enjoyable parenting
Improved quality of life

Supported by: Park et al., 2022, Covington et al., 2021

6. No Evidence of Harm to Attachment

One of the biggest concerns parents have.

Multiple studies have found:

No difference in attachment
No difference in emotional health
No difference in behavior
No differences in parent-child relationships

Years later.

Supported by:

Gradisar et al.
Price et al.
Hiscock et al.
Bilgin & Wolke

7. No Evidence of Long-Term Emotional Harm

Researchers followed children years after behavioral sleep interventions and found no increases in:

Anxiety
Emotional problems
Behavioral concerns
Parent-child relationship difficulties

8. Parents Feel More Confident

Several studies report that parents experience:

Increased confidence
Greater consistency
Less bedtime stress
Reduced bedtime conflict

9. Babies Continue Sleeping Well

Some studies found that improvements persisted months—or even years—after the intervention.

For example:

The INSIGHT Study found longer nighttime sleep continuing into toddlerhood.

10. Better Daytime Mood

When babies sleep better, researchers often observe improvements in:

Daytime mood
Alertness
Emotional regulation
Flexibility

11. Sleep Supports Learning

Healthy sleep supports:

Memory
Language learning
Brain development
Physical growth

While this isn’t a “sleep training” finding specifically, helping babies achieve healthy, restorative sleep may support these developmental processes.