Sleep patterns and behavioral comfort during the neonatal period are important indicators of neurological development and physiological stability. However, noise, light, and constant medical interventions and care practices in the NICU environment can negatively affect infants' sleep continuity and quality of rest. Therefore, non-pharmacological approaches that provide sensory support, such as rhythmic and gentle rocking, are thought to be effective in promoting infant relaxation and physiological balance. In this study, an automatic baby swing with adjustable speed and rhythm will be used as an intervention to support infant comfort and sleep organization. Clinically stable term and preterm newborns who meet the specified inclusion criteria will be included in the study. Participants will be randomly assigned to two groups: the intervention group (first automatic swing application, then measurement without the swing) and the control group (first measurement without the swing, then measurement in the automatic baby swing). The intervention will be implemented for 60 minutes after daytime care at 9:00 AM and 12:00 PM, and for 60 minutes after nighttime care at 9:00 PM and 12:00 AM. The infants' BIS values, comfort, and physiological parameters will be monitored throughout the entire process. The study will evaluate the infants' sleep-wake cycles, comfort behaviors (e.g., facial expressions, body movements, crying), and physiological parameters (e.g., heart rate, respiratory rate, oxygen saturation) as outcome variables. Data will be collected using standardized observation forms and monitoring devices. This study is expected to contribute to evidence-based nursing practice by demonstrating the effects of movement-based nonpharmacological interventions on newborn comfort, sleep quality, and physiological stability.
