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Related Concept Videos

Instrument Calibration01:12

Instrument Calibration

Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Uncertainty in Measurement: Reading Instruments02:46

Uncertainty in Measurement: Reading Instruments

Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
Units of Measurement01:27

Units of Measurement

Mechanical engineering is one of the oldest branches of engineering. It deals with designing, analyzing, and manufacturing machines and mechanical systems. To ensure precise and accurate calculations, units of measurement are used. They provide a standard system for expressing and comparing physical quantities.
There are various well-known historical measurement systems, such as the Babylonian system, the Roman system, the Egyptian system, the Olympian system, the British system, and the Indus...
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
Accuracy and Precision01:52

Accuracy and Precision

Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.  Highly accurate measurements...

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Measuring Respiratory Function in Mice Using Unrestrained Whole-body Plethysmography
08:51

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Published on: August 12, 2014

Measurement and instrument design.

Joyce Pittman1, Tamilyn Bakas

  • 1Clarian Health-Methodist Hospital, Indianapolis, Indiana 46206, USA. jpittma3@clarian.org

Journal of Wound, Ostomy, and Continence Nursing : Official Publication of the Wound, Ostomy and Continence Nurses Society
|November 16, 2010
PubMed
Summary
This summary is machine-generated.

High-quality data collection is essential for robust research. This article outlines key considerations for developing effective data collection instruments, covering theoretical foundations, conceptual models, instrument selection, questionnaire design, and ensuring reliability and validity.

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Area of Science:

  • Research Methodology
  • Data Collection Science

Background:

  • The integrity and reproducibility of scientific research are fundamentally reliant on the quality of the data collected.
  • Developing appropriate tools for data collection is a critical step that influences research outcomes.

Purpose of the Study:

  • To provide a comprehensive overview of essential considerations for designing and developing data collection instruments.
  • To guide researchers in creating reliable and valid tools for empirical inquiry.

Main Methods:

  • Review of fundamental theoretical issues in instrument development.
  • Discussion on conceptual model formulation.
  • Analysis of instrument type selection, questionnaire design, construction, and psychometric evaluation (reliability and validity).

Main Results:

  • Instrument development requires careful attention to theoretical underpinnings and conceptual clarity.
  • Systematic approaches to questionnaire design and construction are crucial.
  • Establishing reliability and validity is paramount for defensible research findings.

Conclusions:

  • Adherence to best practices in instrument development enhances research quality.
  • Researchers must integrate theoretical, design, and psychometric considerations for robust data collection.