In psychology, stress is a feeling of emotional strain and pressure. Stress is a form of psychological and mental discomfort. Small amounts of stress may be beneficial, as it can improve athletic performance, motivation and reaction to the environment. Excessive amounts of stress, however, can increase the risk of , heart attacks, , and mental illnesses such as depression
Psychological stress can be external and related to the environment, but may also be caused by internal perceptions that cause an individual to experience anxiety or other negative emotions surrounding a situation, such as pressure, discomfort, etc., which they then deem stressful.
Hans Selye (1974) proposed four variations of stress. On one axis he locates good stress (eustress) and bad stress (distress). On the other is over-stress (hyperstress) and understress (hypostress). Selye advocates balancing these: the ultimate goal would be to balance hyperstress and hypostress perfectly and have as much eustress as possible.
The term "eustress" comes from the Greek root eu- which means "good" (as in "euphoria"). Eustress results when a person perceives a stressor as positive. "Distress" stems from the Latin root dis- (as in "dissonance" or "disagreement"). Medically defined distress is a threat to the quality of life. It occurs when a demand vastly exceeds a person's capabilities.
Stressors are more likely to affect the health of an individual when they are "chronic, highly disruptive, or perceived as uncontrollable". In psychology, researchers generally classify the different types of stressors into four categories: 1) crises/catastrophes, 2) major life events, 3) daily hassles/microstressors, and 4) ambient stressors. According to Ursin (1988), the common factor between these categories is an inconsistency between expected events ("set value") and perceived events ("actual value") that cannot be resolved satisfactorily, which puts stress into the broader context of cognitive-consistency theory.
The length of time since occurrence and whether or not it is a positive or negative event are factors in whether or not it causes stress and how much stress it causes. Researchers have found that events that have occurred within the past month generally are not linked to stress or illness, while chronic events that occurred more than several months ago are linked to stress and illness and personality change. Additionally, positive life events are typically not linked to stress and if so, generally only trivial stress while negative life events can be linked to stress and the health problems that accompany it. However, positive experiences and positive life changes can predict decreases in neuroticism.
Daily hassles are the most frequently occurring type of stressor in most adults. The high frequency of hassles causes this stressor to have the most physiological effect on an individual. Carolyn Aldwin, Ph.D., conducted a longitudinal study on older men (mean age ca. 66 years at the time of first stress assessment) at the Oregon State University that examined the perceived intensity of daily hassles on an individual's mortality. Aldwin's study concluded that there is a strong correlation between individuals who rate their hassles as very intense and a high level of mortality. One's perception of their daily stressors can have a modulating effect on the physiological impact of daily stressors.
There are three major psychological types of conflicts that can cause stress.
Travel-related stress results from three main categories: lost time, surprises (an unforeseen event such as lost or delayed baggage) and routine breakers (inability to maintain daily habits).
To calculate one's score, add up the number of "life change units" if an event occurred in the past year. A score of more than 300 means that individual is at risk for illness, a score between 150 and 299 means risk of illness is moderate, and a score under 150 means that individual only has a slight risk of illness.
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A modified version was made for non-adults. The scale is below.
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The SRRS is used in psychiatry to weight the impact of life events.
In the physiological domain of oculomotor function alone, several physiological responses are suspected to detect different stress situations in a person-specific and objective manner (not by means of a survey). For example, via eye movement and gaze behavior,
This physiological stress response involves high levels of sympathetic nervous system activation, often referred to as the "fight or flight" response. The response involves pupil dilation, release of endorphins, increased heart and respiration rates, cessation of digestive processes, secretion of adrenaline, arteriole dilation, and constriction of veins.
There is some evidence that stress can make the individual more susceptible to physical illnesses like the common cold. "Although chronic (but not acute) stressful events are associated with greater susceptibility, the association between social diversity and colds is not altered after controlling for life events." Stressful events, such as job changes, correlate with insomnia, impaired sleeping, and health complaints.Compare: Research indicates the type of stressor (whether it is acute or chronic) and individual characteristics such as age and physical well-being before the onset of the stressor can combine to determine the effect of stress on an individual. An individual's personality characteristics (such as level of neuroticism), genetics, and childhood experiences with major stressors and traumas may also dictate their response to stressors. Stress may also cause headaches.
Chronic stress and a lack of coping resources available or used by an individual can often lead to the development of psychological issues such as depression and Anxiety disorder.Schlotz W, Yim IS, Zoccola PM, Jansen L, Schulz P (2011). "The perceived stress reactivity scale: Measurement invariance, stability, and validity in three countries". Psychol Assess. (pp. 80–94). This is particularly true regarding chronic stressors. These are stressors that may not be as intense as an acute stressor like a natural disaster or a major accident, but they persist over longer periods of time. These types of stressors tend to have a more negative impact on health because they are sustained and thus require the body's physiological response to occur daily. This depletes the body's energy more quickly and usually occurs over long periods of time, especially when such microstressors cannot be avoided (for example: stress related to living in a dangerous neighborhood). Chronic stress may lead to allostatic load, a biological process affecting many physiological systems. For example, studies have found that caregivers, particularly those of dementia patients, have higher levels of depression and slightly worse physical health than non-caregivers.
Studies have also shown that perceived chronic stress and the hostility associated with Type A personalities are often correlated with much higher risks of cardiovascular disease. This occurs because of the compromised immune system as well as the high levels of arousal in the sympathetic nervous system that occur as part of the body's physiological response to stressful events. However, it is possible for individuals to exhibit hardiness a term referring to the ability to be both chronically stressed and healthy.Kobasa, S. C. (1982). "The Hardy Personality: Toward a Social Psychology of Stress and Health". In G. S. Sanders & J. Suls (Eds.), Social Psychology of Health and Illness (pp. 1–25). Hillsdale, NJ: Lawrence Erlbaum Assoc. Chronic stress can correlate with psychological disorders such as delusions. Pathological anxiety and chronic stress lead to structural degeneration and impaired functioning of the hippocampus.
It has long been believed that negative affective states, such as feelings of anxiety and depression, could influence the pathogenesis of physical disease, which in turn, have direct effects on biological process that could result in increased risk of disease in the end. However, studies done by the University of Wisconsin-Madison and other places have shown this to be partly untrue; although perceived stress seems to increase the risk of reported poor health, the additional perception of stress as something harmful increases the risk even further. For example, when humans are under chronic stress, permanent changes in their physiological, emotional, and behavioral responses are most likely to occur. Such changes could lead to disease. Chronic stress results from stressful events that persist over a relatively long period of time, such as caring for a spouse with dementia, or results from brief focal events that continue to be experienced as overwhelming even long after they are over, such as experiencing a sexual assault.
Experiments show that when healthy human individuals are exposed to acute laboratory stressors, they show an adaptive enhancement of some markers of natural immunity but a general suppression of functions of specific immunity. By comparison, when healthy human individuals are exposed to real-life chronic stress, this stress is associated with a biphasic immune response where partial suppression of cellular and humoral function coincides with low-grade, nonspecific inflammation.
Even though psychological stress is often connected with illness or disease, most healthy individuals can still remain disease-free after confronting chronic stressful events. Also, people who do not believe that stress will affect their health do not have an increased risk of illness, disease, or death. This suggests that there are individual differences in vulnerability to the potential pathogenic effects of stress; individual differences in vulnerability arise due to both genetic and psychological factors. In addition, the age at which the stress is experienced can dictate its effect on health. Research suggests chronic stress at a young age can have lifelong impacts on the biological, psychological, and behavioral responses to stress later in life.
The cultures of the world generally fall into two categories; individualistic and collectivistic.
These cultural differences can affect how people communicate when they are stressed. For example, a member of an individualistic culture would be hesitant to ask for pain medication for fear of being perceived as weak. A member of a collectivistic culture would not hesitate. They have been brought up in a culture where everyone helps each other and is one functional unit whereas the member of the individualistic culture is not as comfortable asking others for aid.
The System 1 – System 2 model of Daniel Kahneman's Thinking, Fast and Slow and others distinguishes between automatic responses, such as those one's native language provides, and a foreign language that requires System 2 work to translate. System 2 can become "depleted" by conscious mental effort, making it more difficult and stressful.
A particularly interesting response to stress is talking to an imaginary friend. A child may feel angry with a parent or their peers who they feel brought this change on them. They need someone to talk to but it definitely would not be the person with whom they are angry. That is when the imaginary friend comes in. They "talk" to this imaginary friend but in doing so they cut off communication with the real people around them.
Social support is defined more specifically as psychological and material resources provided by a social network that are aimed at helping an individual cope with stress. Researchers generally distinguish among several types of social support: instrumental support – which refers to material aid (e.g., financial support or assistance in transportation to a physician's appointment), informational support (e.g., knowledge, education or advice in problem-solving), and emotional support (e.g., empathy, reassurance, etc.). Social support can reduce the rate of stress during pregnancy. Studies have found that those who had a large change in their life with a small amount of social support has a higher chance of complications. Whereas those with a larger support system would have a chance for less complications.
Although many techniques have traditionally been developed to deal with the consequences of stress, considerable research has also been conducted on the prevention of stress, a subject closely related to psychological resilience-building. A number of self-help approaches to stress-prevention and resilience-building have been developed, drawing mainly on the theory and practice of cognitive-behavioral therapy.
Biofeedback may also play a role in stress management. A randomized study by Sutarto et al. assessed the effect of resonant breathing biofeedback (recognize and control involuntary heart rate variability) among manufacturing operators; depression, anxiety and stress significantly decreased.
There are various ways individuals deal with perceived threats that may be stressful. However, people have a tendency to respond to threats with a predominant coping style, in which they dismiss feelings, or manipulate the stressful situation.
There are different classifications for coping, or defense mechanisms, however they all are variations on the same general idea: There are good/productive and negative/counterproductive ways to handle stress. Because stress is perceived, the following mechanisms do not necessarily deal with the actual situation that is causing an individual stress. However, they may be considered coping mechanisms if they allow the individual to cope better with the negative feelings/anxiety that they are experiencing due to the perceived stressful situation, as opposed to actually fixing the concrete obstacle causing the stress. The following mechanisms are adapted from the DSM-IV Adaptive Functioning Scale, APA, 1994.
Another way individuals can cope with stress is by the way one perceives stress. Perceptions of stress are critical for making decisions and living everyday life. The outlook or the way an individual perceives the given situation can affect the manner to which the individual handles stress, whether it be positive or negative. Too much stress can be detrimental to the individual and can cause negative psychological and physical health effects.
Other adaptive coping mechanisms include anticipation, altruism, and self-observation.
Other inhibition coping mechanisms include undoing, dissociation, denial, projection, and rationalization. Although some people claim that inhibition coping mechanisms may eventually increase the stress level because the problem is not solved, detaching from the stressor can sometimes help people to temporarily release the stress and become more prepared to deal with problems later on.
Suggested strategies to improve stress management include:
Depending on the situation, all of these coping mechanisms may be adaptive, or maladaptive.
"Stress" has subsequently become a mainstay of pop psychology.
For example:
Language barriers
Changes in the home
Social support and health
Management
Prevention and resilience building
Exercising to reduce stress
Theoretical explanations
Coping mechanisms
Highly adaptive/active/problem-focused mechanisms
Mental inhibition/disavowal mechanisms
Active mechanisms
Health promotion
History
See also
Further reading
External links
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