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Related Concept Videos

Surveys02:16

Surveys

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Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be delivered as paper-and-pencil questionnaires, administered electronically, or conducted verbally. Generally, the survey itself can be completed in a short time, and the ease of administering a survey makes it easy to collect data from a large number of people.
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Introduction to Surveying, Plane Surveying and Geodetic Surveys01:27

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Surveying is the art and science of mapping the earth's surface. It involves measuring distances, angles in horizontal or vertical directions, and levels to understand the shape and size of land features. Surveying techniques are essential for various tasks, such as identifying the levels of a land area with reference to a specific point, and mapping undulations and water bodies.There are two main types of surveying: plane surveys and geodetic surveys. Plane surveys assume the earth is flat,...
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Errors and Mistakes in Surveying01:19

Errors and Mistakes in Surveying

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Errors and mistakes in surveying refer to inaccuracies in measurements and data recording. The errors are deviations from the actual value caused by human sensory limitations, equipment flaws, or environmental effects. These errors are typically unintentional and can result from the inherent imperfections in the instruments used, atmospheric conditions, or the observer’s inability to perceive exact measurements. On the other hand, mistakes are caused by the surveyor's lack of...
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Types of Surveys01:27

Types of Surveys

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Surveys are essential for marking property boundaries near water bodies. Different types of surveys are defined, each with its own function. Land surveys mark the property boundaries, while route surveys determine the position of properties on nearby highways. Topographic surveys create maps by capturing the three-dimensional features of the land. Hydrographic surveys focus on the shapes of underwater areas and the movement of streams through the properties. Mine surveys determine the relative...
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Survey Safety01:28

Survey Safety

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Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
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Topographic Surveying and Contours01:29

Topographic Surveying and Contours

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Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
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Related Experiment Video

Updated: Feb 11, 2026

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop
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A Twitter-based survey on marijuana concentrate use.

Raminta Daniulaityte1, Mussa Y Zatreh2, Francois R Lamy3

  • 1Center for Interventions, Treatment, and Addictions Research (CITAR), Department of Population and Public Health Sciences, Wright State University Boonshoft School of Medicine, USA; Ohio Center of Excellence in Knowledge-enabled Computing (Kno.e.sis), Department of Computer Science and Engineering, Wright State University, USA.

Drug and Alcohol Dependence
|April 19, 2018
PubMed
Summary
This summary is machine-generated.

Marijuana concentrate use is more common in states with liberal cannabis policies. Daily use is linked to recreational states and therapeutic purposes, highlighting areas for further research.

Keywords:
CannabisCannabis legalizationMarijuana concentratesSocial mediaTwitterWeb survey

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Area of Science:

  • Cannabis research
  • Public health
  • Substance use studies

Background:

  • Marijuana concentrate products offer higher potency cannabis.
  • Understanding user demographics and usage patterns is crucial for public health.
  • Previous research has not fully explored factors associated with concentrate use.

Purpose of the Study:

  • To analyze characteristics of marijuana concentrate users.
  • To describe patterns and reasons for marijuana concentrate use.
  • To identify factors associated with daily marijuana concentrate use among U.S. cannabis users.

Main Methods:

  • An anonymous web-based survey was conducted in June 2017.
  • 687 U.S.-based cannabis users were recruited via Twitter.
  • Multiple logistic regression analyses identified predictors of concentrate use.

Main Results:

  • 48% of respondents reported marijuana concentrate use.
  • Living in recreational or medical-legal states, younger age, and daily herbal cannabis use predicted concentrate use.
  • Daily concentrate use was associated with living in recreational states and using concentrates for therapeutic reasons.

Conclusions:

  • State marijuana policies are associated with increased likelihood and frequency of concentrate use.
  • Characteristics and therapeutic use patterns of daily concentrate users require further investigation.
  • Community-recruited samples are recommended for future research on marijuana concentrate users.