Nature exposure and mental health refers to the association between an individual interacting with natural environments and its effect on the individual's mental health. Most studies consider any interaction with nature as exposure, such as a hike, being in a forest or a place with water (e.g. lake, beach), going on a walk in a park, etc. [1] Currently there is extensive research on the impact of the exposure to nature on people, which finds a beneficial association in various ways. Studies show that the contact of human beings with nature has decreased with the contemporary lifestyle of being most of the time indoors and with increasing time spent on screens. However, the interaction with nature has been considered to be a general health promoter thanks to the many benefits it brings to mental health and cognition as well. [2] As a consequence, therapists use nature in their treatments to improve mental or physical health. These treatments and techniques are called ecotherapy.
Mental health has been defined as the state of mental well-being that enables people to cope with the stresses of life, realize their abilities, learn well and work well, and contribute to their community. [3] Research on the exposure to natural environments show that nature strengthens our mental health in multiple ways, such as lowering stress and improving mood. [4] Moreover, there is evidence that demonstrates that the contact with nature is associated with increases in happiness, subjective well-being, positive affect, positive social interactions and a sense of meaning and purpose in life, as well as decreases in mental distress. [4] A practical example of this are nature walks. These can increase brain activity in the subgenual prefrontal cortex, which becomes deactivated when a person is feeling anxious or depressed. [1]
Research shows that the mental health effects of nature are positive across all ages. [5] In regards to children, in Denmark there was a study done throughout eighteen years that analyzed the comparison between children ages 0–10 years old that lived in neighborhoods with more green space and children from lower levels of exposure to green space. It was found that the children from the higher level of green space had 55% less risk of developing multiple psychiatric disorders, such as depression, schizophrenia, substance disorder, eating disorders, and mood disorders. [6] Similarly, another study done in four European cities found that adults with low levels of exposure to outdoor environments in childhood had significantly worse mental health compared to adults with high levels of exposure to outdoor environments in childhood. [5] A 10-year UK study found that both the greeness of people's home surroundings (within 300m of their home) and their access to green and blue spaces nearby (such as parks, lakes and beaches) both reduced people's risk of anxiety and depression. [7] [8] In addition, there are restorative effects from nature that support the mental health and well-being for the elderly. Studies show that the interaction of older adults with nature can be linked to better moods, decreased chance of depression, reduced stress levels and improved cognitive function. [9]
Cognition refers to all forms of knowing and awareness, such as perceiving, conceiving, remembering, reasoning, judging, imagining, and problem solving. [10] Thanks to both correlational and experimental research, a positive association has been found between the environment and cognitive abilities. [1] Some of the main benefits that studies have found are improvement on working memory performance, improved attention, cognitive flexibility, and attentional-control tasks. [1] In contrast, exposure to urban environments has been linked to attention deficits. [4]
Short periods of nature exposure can also cause cognitive benefits, including exposure just through images. [11] An attentional-control experiment made by Australian researchers asked college students to participate in a dull, attention-draining task in which they had to press a computer key when they saw certain numbers flash on the screen. Midway through the task participants had micro-breaks of 40 seconds in which they would see either a city scene with a flowering meadow green roof or a bare concrete roof. The participants that viewed the green roof made significantly less omission errors and showed more consistent responding to the task compared to participants who viewed the concrete roof according to the study. [11] Such changes in attention can reflect, for example, on how humans perceive time in nature when compared to urban environments. [12]
In addition to the exposure to images of nature, multiple experimental studies have used a wide range of stimulus types such as sounds and real world exposure. [1] These studies have compared participants’ cognitive performance after nature exposure in comparison with urban environments. [6] A significant impact that has been discovered consistently with natural environments is the improvement in working memory. This has been found persistently through a backward digital span task, in which participants are told to repeat sequences of numbers (which vary in length) in reverse order. Likewise, participants that had exposure to natural environments improved their performance. [1]
Cognitive psychology is the scientific study of mental processes such as attention, language use, memory, perception, problem solving, creativity, and reasoning. Cognitive psychology originated in the 1960s in a break from behaviorism, which held from the 1920s to 1950s that unobservable mental processes were outside the realm of empirical science. This break came as researchers in linguistics and cybernetics, as well as applied psychology, used models of mental processing to explain human behavior. Work derived from cognitive psychology was integrated into other branches of psychology and various other modern disciplines like cognitive science, linguistics, and economics.
In psychology, a mood is an affective state. In contrast to emotions or feelings, moods are less specific, less intense and less likely to be provoked or instantiated by a particular stimulus or event. Moods are typically described as having either a positive or negative valence. In other words, people usually talk about being in a good mood or a bad mood. There are many different factors that influence mood, and these can lead to positive or negative effects on mood.
In psychology, theory of mind refers to the capacity to understand other people by ascribing mental states to them. A theory of mind includes the understanding that others' beliefs, desires, intentions, emotions, and thoughts may be different from one's own. Possessing a functional theory of mind is crucial for success in everyday human social interactions. People utilize a theory of mind when analyzing, judging, and inferring others' behaviors. The discovery and development of theory of mind primarily came from studies done with animals and infants. Factors including drug and alcohol consumption, language development, cognitive delays, age, and culture can affect a person's capacity to display theory of mind. Having a theory of mind is similar to but not identical with having the capacity for empathy or sympathy.
Environmental psychology is a branch of psychology that explores the relationship between humans and the external world. It examines the way in which the natural environment and our built environments shape us as individuals. Environmental psychology investigates how humans change the environment and how the environment influences humans' experiences and behaviors. The field defines the term environment broadly, encompassing natural environments, social settings, built environments, learning environments, and informational environments. According to an article on APA Psychnet, environmental psychology is when a person thinks to a plan, travels to a certain place, and follows through with the plan throughout their behavior.
Cognitive ergonomics is a scientific discipline that studies, evaluates, and designs tasks, jobs, products, environments and systems and how they interact with humans and their cognitive abilities. It is defined by the International Ergonomics Association as "concerned with mental processes, such as perception, memory, reasoning, and motor response, as they affect interactions among humans and other elements of a system. Cognitive ergonomics is responsible for how work is done in the mind, meaning, the quality of work is dependent on the persons understanding of situations. Situations could include the goals, means, and constraints of work. The relevant topics include mental workload, decision-making, skilled performance, human-computer interaction, human reliability, work stress and training as these may relate to human-system design." Cognitive ergonomics studies cognition in work and operational settings, in order to optimize human well-being and system performance. It is a subset of the larger field of human factors and ergonomics.
Affect, in psychology, is the underlying experience of feeling, emotion, attachment, or mood. It encompasses a wide range of emotional states and can be positive or negative. Affect is a fundamental aspect of human experience and plays a central role in many psychological theories and studies. It can be understood as a combination of three components: emotion, mood, and affectivity. In psychology, the term affect is often used interchangeably with several related terms and concepts, though each term may have slightly different nuances. These terms encompass: emotion, feeling, mood, emotional state, sentiment, affective state, emotional response, affective reactivity, disposition. Researchers and psychologists may employ specific terms based on their focus and the context of their work.
Brain training is a program of regular activities purported to maintain or improve one's cognitive abilities. The phrase “cognitive ability” usually refers to components of fluid intelligence such as executive function and working memory. Cognitive training reflects a hypothesis that cognitive abilities can be maintained or improved by exercising the brain, analogous to the way physical fitness is improved by exercising the body. Cognitive training activities can take place in numerous modalities such as cardiovascular fitness training, playing online games or completing cognitive tasks in alignment with a training regimen, playing video games that require visuospatial reasoning, and engaging in novel activities such as dance, art, and music.
Cognitive impairment is an inclusive term to describe any characteristic that acts as a barrier to the cognition process or different areas of cognition. Cognition, also known as cognitive function, refers to the mental processes of how a person gains knowledge, uses existing knowledge, and understands things that are happening around them using their thoughts and senses. Cognitive impairment can be in different domains or aspects of a person's cognitive function including memory, attention span, planning, reasoning, decision-making, language, executive functioning, and visuospatial functioning. The term cognitive impairment covers many different diseases and conditions and may also be symptom or manifestation of a different underlying condition. Examples include impairments in overall intelligence, specific and restricted impairments in cognitive abilities, neuropsychological impairments, or it may describe drug-induced impairment in cognition and memory. Cognitive impairments may be short-term, progressive, or permanent.
Green exercise refers to physical exercise undertaken in natural environments. Physical exercise is well known to provide physical and psychological health benefits. There is also good evidence that viewing, being in, and interacting with natural environments has positive effects, reducing stress and increasing the ability to cope with stress, reducing mental fatigue and improving concentration and cognitive function. The concept of green exercise has therefore grown out of well-established areas such as the attention restoration theory within environmental psychology which have tended to focus on the psychological and physical effects of viewing nature and well-recognised work about the psychological benefits of physical exercise.
In psychology, negative affectivity (NA), or negative affect, is a personality variable that involves the experience of negative emotions and poor self-concept. Negative affectivity subsumes a variety of negative emotions, including anger, contempt, disgust, guilt, fear, and nervousness. Low negative affectivity is characterized by frequent states of calmness and serenity, along with states of confidence, activeness, and great enthusiasm.
In land-use planning, urban green spaces are open-space areas reserved for parks and other "green spaces", including plant life, water features – also referred to as blue spaces – and other kinds of natural environment. Most urban open spaces are green spaces, but occasionally include other kinds of open areas. The landscape of urban open spaces can range from playing fields, to highly maintained environments, to relatively natural landscapes.
Attention restoration theory (ART) asserts that people can concentrate better after spending time in nature, or even looking at scenes of nature. Natural environments abound with "soft fascinations" which a person can reflect upon in "effortless attention", such as clouds moving across the sky, leaves rustling in a breeze or water bubbling over rocks in a stream. Philosophically, nature has long been seen as a source of peace and energy, yet the scientific community started rigorous testing only as recently as the 1990s which has allowed scientific and accurate comments to be made about if nature has a restorative attribute.
Memory improvement is the act of enhancing one's memory. Factors motivating research on improving memory include conditions such as amnesia, age-related memory loss, people’s desire to enhance their memory, and the search to determine factors that impact memory and cognition. There are different techniques to improve memory, some of which include cognitive training, psychopharmacology, diet, stress management, and exercise. Each technique can improve memory in different ways.
Childhood memory refers to memories formed during childhood. Among its other roles, memory functions to guide present behaviour and to predict future outcomes. Memory in childhood is qualitatively and quantitatively different from the memories formed and retrieved in late adolescence and the adult years. Childhood memory research is relatively recent in relation to the study of other types of cognitive processes underpinning behaviour. Understanding the mechanisms by which memories in childhood are encoded and later retrieved has important implications in many areas. Research into childhood memory includes topics such as childhood memory formation and retrieval mechanisms in relation to those in adults, controversies surrounding infantile amnesia and the fact that adults have relatively poor memories of early childhood, the ways in which school environment and family environment influence memory, and the ways in which memory can be improved in childhood to improve overall cognition, performance in school, and well-being, both in childhood and in adulthood.
Attentional control, colloquially referred to as concentration, refers to an individual's capacity to choose what they pay attention to and what they ignore. It is also known as endogenous attention or executive attention. In lay terms, attentional control can be described as an individual's ability to concentrate. Primarily mediated by the frontal areas of the brain including the anterior cingulate cortex, attentional control and attentional shifting are thought to be closely related to other executive functions such as working memory.
Nature connectedness is the extent to which individuals include nature as part of their identity. It includes an understanding of nature and everything it is made up of, even the parts that are not pleasing. Characteristics of nature connectedness are similar to those of a personality trait: nature connectedness is stable over time and across various situations.
A cognitive vulnerability in cognitive psychology is an erroneous belief, cognitive bias, or pattern of thought that predisposes an individual to psychological problems. The vulnerability exists before the symptoms of a psychological disorder appear. After the individual encounters a stressful experience, the cognitive vulnerability shapes a maladaptive response that increases the likelihood of a psychological disorder.
Neuroenhancement or cognitive enhancement is the experimental use of pharmacological or non-pharmacological methods intended to improve cognitive and affective abilities in healthy people who do not have a mental illness. Agents or methods of neuroenhancement are intended to affect cognitive, social, psychological, mood, or motor benefits beyond normal functioning.
Nature therapy, sometimes referred to as ecotherapy, forest therapy, forest bathing, grounding, earthing, Shinrin-Yoku or Sami Lok, is a practice that describes a broad group of techniques or treatments using nature to improve mental or physical health. Spending time in nature has various physiological benefits such as relaxation and stress reduction. Additionally, it can enhance cardiovascular health and reduce risks of high blood pressure.
In urban planning and design, blue space comprises areas dominated by surface waterbodies or watercourses. In conjunction with greenspace, it may help in reducing the risks of heat-related illness from high urban temperatures . Substantial urban waterbodies naturally exist as integral features of the geography of many cities because of their historical development, for example the River Thames in London.