Conceptual and Operational Definitions Depression. According to Laura (2019) on website Medical News Today with the tittle “What is depression and what can I do about it?” are being define “depression” as a types of mood that make someone not able to do a daily life routine like a normal person. This type of mental illness is profoundly serious medical condition that everyone must to take care also. It is not about Monday blue and the persons who are suffered with depression must take the appropriate treatment with the right person for instance the psychiatric. Based on the National Institute of Mental Health (NIMH) they said major depression is a quite common mental disorder in the United States and “that’s 7.1% of all US adults age 18 and older. Adult females have a higher prevalence of experiencing a major depressive episode than their male counterparts8.7% compared to 5.3% in adult males. (Dina Cagliostro n.d para.5). The symptoms of depression are different among men and women and the children for instance in mood, emotional well-being, behaviour, sexual interest and others. The factor why the person was suffered with depression due to family history, early childhood trauma, the brain structure, medical conditions and drug use. (Valencia Higuera and Kimberly Holland, 2020). According to Amy Morin, LCSW (2020), there was different perspective on the late centuries which is on the second millennium B.C.E in Mesopotamia, depression was define as a spiritual rather than a physical condition and was dealt with by priests rather than physicians. Based on the second millennium, the causes of depression are because the demons and evil spirits through many cultures. During the Age of Enlightenment, depression was discuss as an attitude from the family history that can’t be change and the effect due to this beliefs was make people who are suffered with depression being as a strangers by the normal persons. During the 1895, Emil Kraepelin who is the German Psychiatrist was the first people distinguish manic depression as we know today “bipolar disorder”, as a Schizophrenia or they called “dementia praecox” on that time. The operational definition of depression is a mental condition that make someone cannot control their self in whatever he or she do. It is examined by Hamilton Depression Rating Scale (RAM-D) by Max Hamilton which is a psychiatrist at Leeds University in the late 1950s. Stress. According to Jeanne Segal, Melinda Smith et.al (2020), stress is your body responding in whatever kinds of events and it is quite common illness among humans. Basically, stress can be as a positive perspective which is it helps us to be more focused, energetic and alert. When someone feel threatened, him or her “nervous system responds by releasing a flood of stress hormones, including adrenaline and cortisol, which rouse the body for emergency action.” (Jeanne Segal, Melinda Smith et.al 2020 para.5). This process known as “fight-or-flight” or the stress response. Every person who are suffered with stress was different because some of people able to control their stress than others (Jennifer Casarella 2019). (SYMTOMPS STRESS) However, too much stress can affect mental and physical health, particularly if it becomes chronic(ongoing) or overwhelming. Stress can affect your body, your thought and feelings and your behaviour. If you are experiencing any symptoms of stress, it is best to see your doctor as it can contribute to health problems, such as high blood pressure, heart disease, obesity and diabetes. Body Headaches Other aches and Pain Sleep disturbances Upset stomach, diarrhoea High blood pressure Weekend immune system Fatigue Muscle tension Change in sex drive (Male or female) MIND Anxiety, worry Inerrability Depression or sadness Feeling overwhelmed and out of control Feeling restless Feeling moody, tearful Difficulty concentrating Low self-esteem, lack of confidence Behaviour Overeating or Undereating Outbursts of anger Relationship problems Alcohol, smoking or drug abuse Avoiding people. (DEFINITON STRESS AMONG PSYCHOLOGIST DULU2/HISTORY OF STRESS) The term of stress was borrowed from the field of physics by one of the father of stress research Hans Salye.In physics, stress describes the force that produces strain of physical body(I.e. bending a mental until it snaps occur because of the force,stress,exerted on it.) Hans Selye began using the term stress after after completing his medical training at the university of Montreal in the 1920’s.He noticed that no matter what his hospitalized patient suffer from, they all had one things in common. They all looked sick.in his view. They all were under physical stress. He proposed that stress was a non-specific strain on the body caused by irregularities in body functions. The stress resulted in the released of stress of hormones. He called this the “General Adaptation syndrome” (a closer look at general adaptation syndrome, our body’s short term and look term reactions to stress). The great Debate Selye pioneered the field of stress research of provided convincing arguments that stress impacted stress. But not all agreed with his physiological of view stress as a non- specific phenomenon though. What about psychological stress? Many physicians, psychologists and researcher thought so. A physician named John mason an experiment in which group of monkeys were deprived of food for short period of time. In group 1 monkey were alone, while in group 2 monkeys watched others received food. Even though both groups of monkeys were under physical stress of hunger, those that saw others eat had higher stress hormones levels. He therefore showed that psychological stress was as powerful as physical stress at inducing the body’s stress levels. In one interesting experiments, researchers measured the stress hormone levels of experienced parachute jumpers. Jumping out of plane had to be stressful! Strangely, their stress hormone were levels were normal. Stress hormone levels were then measured in both people jumping for the first time and their instructors. They found a big difference! On the day before the jump, student’s levels were normal while instructors’ levels were extremely high. On the jump day, students’ levels were extremely high, while instructor’s levels were normal. They concluded that 24 hours before the jump, the instructors’ anticipation resulted in higher stress hormone levels because they knew what to expect. In Hans Selye’s theory, General adaptation syndrome had three stages. Stage 1 Alarm Reactions This is the immediate reaction to a stressor. In the initial phase of stress, humans exhibit a «fight or flight» response. This stage takes energy away from other systems increasing our vulnerability to illness. Stage 2 Resistance If alarm body continue, the body begins getting’s to be used stressed. But this adaptation is not good for your health. Since concentrated energy on stress reactions. Stage 3 Exhaustions In Selye’s view, patients who experience long-term stress could succumb to heart attacks or severe infection due to their reduced resistance to illness. (OPERATIONAL DEFINITION STRESS & SCALE APA YG DIGUNAKAN UNTUK KIRA STRESS) An operational definition is a definition of a variable in terms of precisely how it is to be measured. These measures generally fall into one of three broad categories. Self-report measures are those in which participants report on their own thoughts, feelings, and actions, as with the Rosenberg Self-Esteem Scale. This is an extremely broad category that includes the observation of people’s behavior both in highly structured laboratory tasks and in more natural settings. A good example of the former would be measuring working memory capacity using the backward digit span task. A good example of the latter is a famous operational definition of physical aggression from researcher Albert Bandura and his colleagues Bandura, Ross, & Ross, 1961). They filmed each child and counted the number of acts of physical aggression he or she committed. These included hitting the doll with a mallet, punching it, and kicking it. Their operational definition, then, was the number of these specifically defined acts that the child committed in the 20-minute period. For any given variable or construct, there will be multiple operational definitions. Stress is a good example. A rough conceptual definition is that stress is an adaptive response to a perceived danger or threat that involves physiological, cognitive, affective, and behavioral components. But researchers have operationally defined it in several ways. The Social Readjustment Rating Scale is a self-report questionnaire on which people identify stressful events that they have experienced in the past year and assigns points for each one depending on its severity. For example, a man who has been divorced, changed jobs, and had a change in sleeping habits in the past year would have a total score of 125. The Daily Hassles and Uplifts Scale is similar but focuses on everyday stressors like misplacing things and being concerned about one’s weight. The Perceived Stress Scale is another selfreport measure that focuses on people’s feelings of stress. Researchers have also operationally defined stress in terms of several physiological variables including blood pressure and levels of the stress hormone cortisol. When psychologists use multiple operational definitions of the same construct—either within a study or across studies—they are using converging operations. The idea is that the various operational definitions are «converging» on the same construct. When scores based on several different operational definitions are closely related to each other and produce similar patterns of results, this constitutes good evidence that the construct is being measured effectively and that it is useful. The various measures of stress, for example, are all correlated with each other and have all been shown to be correlated with other variables such as immune system functioning. (Segerstrom and Miller, 2004),2 This is what allows researchers eventually to draw useful general conclusions, such as «stress is negatively correlated with immune system functioning, as opposed to more specific and less useful ones, such as people’s scores on the Perceived Stress Scale are negatively correlated with their white blood counts. . References Segerstrom & Miller 2004, 2 Google scholar the open university of Hong Kong. https://www.healthdirect.gov.au/stress-symptoms