The PNAS scale, also known as the Positive and Negative Affect Schedule, is a psychological measurement tool used to assess the degree of positive and negative emotions an individual has experienced in the past month. Positive emotions include pleasant, energetic, and satisfying emotions such as excitement, pride, and inspiration; Negative emotions include unpleasant, painful, and frustrating emotions such as fear, guilt, and hostility.

In the journey of life, we may encounter various traumatic events that sometimes leave profound marks on our psyche. Post traumatic stress disorder (PTSD) is a persistent psychological distress caused by experiencing or witnessing a severe traumatic event. To help assess and understand your PTSD symptoms, the Posttraumatic Stress Disorder Self Rating Scale (PCL-C) is an effective tool.

The SAS Self Rating Anxiety Scale was developed by psychologist William W.K. Zung to measure the severity of an individual's anxiety state and its changes during treatment. It is widely used in the work of psychological counselors, psychologists, and psychiatrists to assess anxiety levels and monitor treatment outcomes. However, please note that this scale is not intended for diagnosing mental illnesses.

The Hamilton Depression Scale was developed by American psychiatrist Max Hamilton in 1960 and is one of the most commonly used scales for assessing depression in clinical practice. The HAMD scale consists of 24 items, each with a set of descriptive statements covering various aspects of depression such as mood, sleep, appetite, weight changes, anxiety, guilt, suicidal thoughts, etc. These projects aim to comprehensively understand the depressive symptoms you may be experiencing.