The study was carried to determine the effect of yakson or gentle human touch methods applied by the mothers to their preterm newborns on mother's attachment level and baby's response.

The study was carried out as a randomized controlled experimental research. Population of the study is all of the babies who were hospitalized at the neonatal intensive care unit of a state hospital in Turkey between August 2016 and August 2017 and the mothers of the babies; its sample is 90 mothers and their babies included with randomization method who were matching the criteria who were also hospitalized between these dates.

Inclusion Criteria:

Mothers' Selection Criteria

• Mother should not have any defines psychiatric diseases,
• Mother should not have any physical disabilities,
• Mother should be literate and open to communication,
• Should not have transportation problem,
• Should be willing to participate and volunteer for the study.

Babies' Selection Criteria

• Babies should be between 26-34 gestation weeks,
• Should not have congenital abnormalities,
• Babies should not have any health problems that may hinder the practice (Intracranial hemorrhage, sepsis, hemorrhagic diseases, having an operation, etc.).

Exclusion Criteria:

-Participants must have inclusion criterias.

The sample of the study consists of babies and their mothers who were matching the criteria of the research between these dates and who volunteered. As a result of the power analysis, sample size was calculated as 90 for experimental and control groups with Power: 0.80. As a result of the sample calculation a total of 90 mothers and babies; 30 for Yakson group, 30 for gentle human touch group, 30 for control group were included in the study. The assignment of mothers and babies to the experiment and control groups was carried out by randomization with drawing lots method.