Stress

An individual�s response to a stressful situation largely depends upon the perceived events and how they are interpreted or appraised. Lazarus has distinguished between two types of appraisal, i.e. primary and secondary. Primary appraisal refers to the perception of a new or changing environment as positive, neutral or negative in its consequences. Negative events are appraised for their possible harm, threat or challenge. Harm is the assessment of the damage that has already been done by an event. Threat is the assessment of possible future damage that may be brought about by the event. Challenge appraisals are associated with more confident expectations of the ability to cope with the stressful event, the potential to overcome and even profit from the event. When we perceive an event as stressful, we are likely to make a secondary appraisal, which is the assessment of one�s coping abilities and resources and whether they will be sufficient to meet the harm, threat or challenge of the event. These resources may be mental, physical, personal or social. If one thinks one has a positive attitude, health, skills and social support to deal with the crises s/he will feel less stressed. This two-level appraisal process determines not only our cognitive and behavioural responses but also our emotional and physiological responses to external events.

These appraisals are very subjective and will depend on many factors. One factor is the past experience of dealing with such a stressful condition. If one has handled similar situations very successfully in the past, they would be less threatening for her/him. Another factor is whether the stressful event is perceived as controllable, i.e. whether one has mastery or control over a situation. A person who believes that s/he can control the onset of a negative situation, or its adverse consequences, will experience less amount of stress than those who have no such sense of personal control. For example, a sense of self-confidence or efficacy can determine whether the person is likely to appraise the situation as a threat or a challenge. Thus, the experience and outcome of a stressor may vary from individual to individual. Stress, includes all those environmental and personal events, which challenge or threaten the well-being of a person. These stressors can be external, such as environmental (noise, air pollution), social (break-up with a friend, loneliness) or psychological (conflict, frustration) within the individual. Very often, these stressors result in a variety of stress reactions, which may be physiological, behavioural, emotional, and cognitive (see Fig in the previous page).

At the physiological level, arousal plays a key role in stressrelated behaviours. The hypothalamus initiates action along two pathways. The first pathway involves the autonomic nervous system. The adrenal gland releases large amount of catecholamines (epinephrine and norepinephrine) into the blood stream. This leads to physiological changes seen in fight-or-flight response. The second pathway involves the pituitary gland, which secretes the corticosteroid (cortisol) which provides energy. The emotional reactions to experience of stress include negative emotions such as fear, anxiety, embarrassment, anger, depression or even denial. The behavioural responses are virtually limitless, depending on the nature of the stressful event. Confrontative action against the stressor (fight) or withdrawal from the threatening event (flight) are two general categories of behavioural responses. Cognitive responses include beliefs about the harm or threat an event poses and beliefs about its causes or controllability. These include responses such as inability to concentrate, and intrusive, repetitive or morbid thoughts.

As indicated in Figure in the previous page, the stresses which people experience also vary in terms of intensity (low intensity vs. high intensity), duration (short-term vs. longterm), complexity ( less complex vs. more complex) and predictability (unexpected vs. predictable). The outcome of stress depends on the position of a particular stressful experience along these dimensions. Usually more intense, prolonged or chronic, complex and unanticipated stresses have more negative consequences than have less intense, short-term, less complex and expected stresses. An individual�s experiences of stress depend on the physiological strength of that person. Thus, individuals with poor physical health and weak constitution would be more vulnerable than would be those who enjoy good health and strong constitution.

Psychological characteristics like mental health, temperament, and selfconcept are relevant to the experience of stress. The cultural context in which we live determines the meaning of any event and defines the nature of response that is expected under various conditions. Finally, the stress experience will be determined by the resources of the person, such as money, social skills, coping style, support networks, etc. All these factors determine the appraisal of a given stressful situation.

Signs and Symptoms of Stress

The way we respond to stress varies depending upon our personality, early upbringing and life experiences. Everyone has their own pattern of stress response. So the warning signs may vary, as may their intensity. Some of us know our pattern of stress response and can gauge the depth of the problem by the nature and severity of our own symptoms or changes in behaviour. These symptoms of stress can be physical, emotional and behavioural. Any of the symptoms can indicate a degree of stress which, if left unresolved, might have serious implications.