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Related Concept Videos

Factors Affecting Perception01:25

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Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
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Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...
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Naturalistic Observations02:30

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If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...
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Stereotypes, Prejudice, and Discrimination02:55

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Humans are very diverse and although we share many similarities, we also have many differences. The social groups we belong to help form our identities (Tajfel, 1974). These differences may be difficult for some people to reconcile, which may lead to prejudice toward people who are different. Prejudice is a negative attitude and feeling toward an individual based solely on one’s membership in a particular social group (Allport, 1954; Brown, 2010). Prejudice is common against people who...
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Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

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Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
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Perceptual Constancy01:12

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Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
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Relating Stomatal Conductance to Leaf Functional Traits
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The Relationship between Perceptions and Objective Measures of Greenness.

Joy L Hart1,2, Ray A Yeager2,3, Daniel W Riggs2

  • 1Department of Communication, College of Arts and Sciences, University of Louisville, Louisville, KY 40292, USA.

International Journal of Environmental Research and Public Health
|December 11, 2022
PubMed
Summary
This summary is machine-generated.

Objective greenspace measures like NDVI and tree canopy correlate with how people perceive their surroundings as green, particularly parks and tree cover. Understanding these links is crucial for interpreting environmental health research.

Keywords:
leaf area indexnormalized difference vegetation indexperceptions of greennesstree canopy

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Area of Science:

  • Environmental Science
  • Urban Ecology
  • Public Health

Background:

  • Objective greenspace metrics are widely used, but their alignment with individual perceptions of greenness is not well understood.
  • Research often relies on remote sensing data, overlooking subjective interpretations of residential greenness.

Purpose of the Study:

  • To investigate the associations between objective greenspace measures and perceived greenness.
  • To determine how different objective metrics align with subjective perceptions of natural vegetation, tree cover, and built greenspaces.

Main Methods:

  • A subsample (n=175) from an environmental cardiovascular risk cohort (2018-2019) completed a greenspace perception survey.
  • Objective greenspace was quantified using Normalized Difference Vegetation Index (NDVI), tree canopy, and leaf area index within a 300m buffer.
  • Principal component analysis was used to identify dimensions of perceived greenspace.

Main Results:

  • Significant positive associations were found between NDVI, tree canopy, leaf area, and perceived greenness (e.g., playgrounds).
  • Tree canopy alone correlated with perceived tree cover.
  • NDVI, tree canopy, and leaf area index showed alignment with perceptions of parks.

Conclusions:

  • Objective measures like NDVI and tree canopy can reflect certain aspects of perceived greenness, such as parks and tree cover.
  • The study highlights the complexity of green metrics and the importance of considering both objective and subjective measures in research.
  • Careful interpretation of greenness data is necessary, acknowledging the nuances between objective quantification and individual perception.