The study aims to introduce a specific motivational intervention for patients with Obstructive Sleep Apnea (OSA) starting CPAP adaptation, aimed at improving sleep quality and disease management through good adherence to treatment. Additionally, the study will investigate adherence to the proposed treatment in both groups, using average daily use as an adherence indicator, defined as the total hours of CPAP divided by the total number of observation days. Secondary objectives include investigating the effectiveness of the motivational treatment on subjective sleep quality compared to the control group and assessing whether there are statistically significant differences between the clinical practice group (Control Group - GC) and the Experimental Group (GS) in terms of daytime sleepiness (ESS), sleep quality (PSQI), disease perceptions (B-IPQ), and quality of life related to the disease (SF-12). Inclusion criteria are adult patients with OSA (mild, moderate, severe) who are beginning their adaptation process to CPAP and can understand the Italian language. Exclusion criteria include minors, patients already adapted to CPAP, and those unable to understand the Italian language. During the ME-CA study at the Sleep Center, participants will undergo the following procedures to evaluate adaptation to CPAP therapy and its impacts on sleep quality and quality of life. Participants will have an initial evaluation with a pulmonologist in an outpatient setting at the Sleep Center (according to standard clinical practice). They will complete questionnaires to collect socio-demographic data, disease perception, daytime sleepiness, sleep quality, quality of life, and service usability at three different times: at enrollment (T0), one week after the intervention (T1), and three months after the conclusion of the intervention (T2). The adaptation process will follow the assigned protocol (GS or GC); specifically, the Experimental Group will receive a four-phase psychological-motivational intervention in addition to standard CPAP adaptation. Phase 1 (Pre-adaptation psychoeducation): Within two days prior to the home visit by the provider, which typically occurs within three days of the visit with the pulmonologist, participants will be shown an educational video on OSA (25 minutes) and provided with necessary supplies (device, masks, and tubing). Phase 2 (Motivational Interview): After the first night of titration and CPAP use, participants will be contacted for a brief motivational interview (25 minutes). Phase 3 (Psychological Support Interview): One week after the provider's intervention and the start of CPAP adaptation, participants will be contacted for a support interview (40 minutes), as the first week of adaptation is considered a high-risk period for abandoning device use. Phase 4 (Monitoring Interview): Two weeks after the provider's intervention and the beginning of CPAP adaptation, participants will be contacted for a monitoring interview (30 minutes) to ensure no difficulties or issues have arisen during the adaptation process. The frequency and duration of the CPAP adaptation will span a total of 16 days. During this period, participants in the Experimental Group (GS) will engage in four distinct phases, each involving specific meetings or evaluations totaling 120 minutes of participation. These will include psychoeducational sessions, motivational interviews, psychological support, and monitoring. The Control Group (GC), on the other hand, will follow the standard CPAP adaptation pathway without additional meetings or interventions during the initial 15-day adaptation period. Participants in the control group will follow the standard CPAP adaptation pathway. After the visit with the pulmonologist responsible for the Sleep Center, patients in the control group will be offered adaptation to CPAP therapy. They will then be contacted by the provider to arrange a home visit, usually within three days of the visit with the pulmonologist, during which the necessary supplies (device, masks, and tubing) will be provided. Following this, there will be a 15-day adaptation period during which the patient will use the device without further contact with medical staff or the provider. At the end of this period, if the patient has shown adequate adaptability to CPAP therapy, the physician will proceed with the final prescription of the device.