The document discusses Mindfulness-Based Stress Reduction (MBSR), which was developed by Jon Kabat-Zinn in 1979 and aims to complement traditional medical treatments by promoting awareness and non-judgmental acceptance of the present moment. MBSR has been shown to reduce physical and psychological distress through practices such as meditation and mindfulness in daily activities. Key components of MBSR include cultivating self-awareness, addressing negative self-talk, and practicing various forms of meditation.