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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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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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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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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 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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Australian scuba diver surveys reveal significant differences in participant characteristics due to varied recruitment methods. Understanding this diver cohort bias is crucial for accurate interpretation of survey findings.

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Area of Science:

  • Diving Medicine
  • Survey Methodology
  • Recreational Diving Safety

Background:

  • Scuba diver surveys in Australia utilize diverse recruitment strategies.
  • This heterogeneity in participant sourcing may lead to distinct respondent characteristics.
  • Previous research has not adequately compared these diver cohorts.

Purpose of the Study:

  • To compare the demographic and health characteristics of Australian scuba divers recruited through three distinct survey methods.
  • To identify potential biases arising from different survey recruitment approaches.
  • To inform the interpretation of future scuba diving research.

Main Methods:

  • Anonymous, online, cross-sectional surveys were distributed to Divers Alert Network Asia-Pacific (DAN AP) members, Professional Association of Diving Instructors (PADI) Asia-Pacific members, and recent PADI certification holders.
  • Data from Australian resident divers were analyzed.
  • Response rates varied significantly across the three groups.

Main Results:

  • A total of 2,275 Australian divers responded.
  • PADI members reported more dives (median 800) than DAN members (330) or PADI divers (28).
  • Prevalence of reported chronic conditions (diabetes, cardiovascular, respiratory, neurological, psychological) was 34% in DAN members and 28% in PADI cohorts. Decompression illness treatment was reported by approximately 5% of DAN/PADI members and 1% of PADI divers. 7.5% of PADI respondents reported perceived life-threatening incidents.

Conclusions:

  • Despite low response rates, significant differences exist between the surveyed diver cohorts.
  • Surveying a single diver cohort may not represent the broader diving population.
  • Findings from diver surveys must be interpreted with an understanding of potential recruitment biases.