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.