In the early stages of life, newborns are dependent on caregivers to meet their basic needs for survival, feeding, and care. Generally, mothers assume primary responsibility for meeting their infants' basic needs and providing care, while fathers take on a supporting role. Both mothers and fathers actively contribute to the baby's healthy emotional development. This study, planned with fathers of 4-6 month old infants, addresses the lack of quantitative evidence regarding the relationship between fathers' involvement in infant care and infants' sensory processing.

Research shows that fathers' active participation in infant care positively impacts children's psychological, cognitive, social, and behavioral development. Mothers must encourage shared care between fathers and infants from the very beginning by providing opportunities for fathers to actively participate. Previous studies evaluating fathers' active involvement and infant development have shown that fathers report feeling a strong bond with their infants from birth, and infants show higher levels of motor, language, and personal/social development. However, no studies have been found that examine the relationship between infant sensory processing skills and the father's active involvement in infant care. This study, planned with fathers of 4-6-month-old infants, addresses the lack of quantitative evidence regarding the relationship between fathers' involvement in infant care and infants' sensory processing. Therefore, this study aims to determine the relationship between fathers' involvement in infant care and infants' sensory processing.

Inclusion Criteria:

• Term infants (37-40 weeks),
• Infants aged 4-6 months

Exclusion Criteria:

• Preterm infants,
• Infants with congenital infections or proven genetic changes,
• Infants and mothers diagnosed with metabolic, neurological, and genetic diseases,
• Children whose parents did not volunteer to study

The study will include healthy, full-term (37-40 weeks of gestation) infants aged 4 to 6 months.