Psychophysiological assessment is a method used in psychodiagnostics to evaluate the relationship between psychological processes and physiological responses. It is based on the principle that emotions, thoughts, and behaviors are accompanied by measurable changes in the body's physiological systems. By recording these responses, psychologists can gain objective information about an individual's emotional state, stress level, cognitive functioning, and overall psychological health. Psychophysiological assessment complements clinical interviews, behavioral observations, and psychological tests by providing biological indicators that may not be evident through self-report measures alone. The primary objective of psychophysiological assessment is to understand how the nervous system, endocrine system, and other physiological systems respond to internal and external stimuli. These assessments are widely used in clinical psychology, health psychology, neuropsychology, forensic psychology, and research settings. They help identify patterns associated with anxiety disorders, depression, post-traumatic stress disorder, attention-deficit disorders, sleep disorders, chronic pain, and other psychological conditions. One of the most commonly used measures is heart rate and heart rate variability (HRV). Heart rate reflects the activity of the autonomic nervous system, while HRV indicates the balance between sympathetic and parasympathetic nervous system functioning. Reduced HRV is often associated with chronic stress, anxiety, depression, and poor emotional