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Related Concept Videos

Principal Stresses: Problem Solving01:15

Principal Stresses: Problem Solving

When analyzing two planes intersecting at right angles under the influence of shearing, tensile, and compressive stresses, it is essential to identify principal planes, maximum shearing stress, and principal stresses. To find the principal planes, apply a formula that equates them to twice the shearing stress divided by the difference between tensile and compressive stresses.
Stress-Strain Diagram01:10

Stress-Strain Diagram

A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This change in...
Stress Concentrations01:13

Stress Concentrations

The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress concentration...
Stress Concentrations01:24

Stress Concentrations

Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller width...
Principal Stresses01:24

Principal Stresses

The graphical depiction of normal and shearing stress equations is represented by a circle, demonstrating the interplay between these stresses under different angular conditions. The center of this circle C, located on the vertical axis, represents the average normal stress, while its radius shows the range of stress variations. At points A and B, where the circle intersects the horizontal axis, the maximum and minimum normal stresses are observed, occurring without shearing stress. These...
Sound Intensity Level00:53

Sound Intensity Level

Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...

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Related Experiment Video

Updated: May 9, 2026

fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals
11:15

fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals

Published on: May 23, 2017

A dissonant scale: stress recognition in the SAQ.

Jennifer A Taylor1, Ravi Pandian

  • 1Department of Environmental and Occupational Health, Drexel University School of Public Health, Philadelphia, PA, USA. jat65@drexel.edu

BMC Research Notes
|August 2, 2013
PubMed
Summary

The Stress Recognition subscale of the Safety Attitudes Questionnaire (SAQ) is not a valid measure of safety climate. Further research is needed to understand its distinct meaning in healthcare settings.

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Area of Science:

  • Healthcare research
  • Organizational psychology
  • Patient safety

Background:

  • Previous analyses of the Safety Attitudes Questionnaire (SAQ) Stress Recognition subscale yielded ambiguous results.
  • Suspected construct validity issues prompted an investigation using existing data and published correlation matrices.

Purpose of the Study:

  • To assess the construct validity of the Stress Recognition subscale within the SAQ.
  • To determine if Stress Recognition aligns with the broader safety climate construct.

Main Methods:

  • Replicated and compared correlation matrices from two prior studies (Speroff and Taylor).
  • Employed Common Factor Analysis using SAS Proc Factor with PRIORS=SMC.
  • Utilized Confirmatory Factor Analysis (CFA) to evaluate model fit.

Main Results:

  • Correlation matrices from both studies were highly similar.
  • Subscales like Teamwork and Safety Climate showed strong correlations (0.53-0.76).
  • Stress Recognition demonstrated very low correlations (-0.15 to 0.03) and unique variance (96.4-100.0%), confirmed by CFA.

Conclusions:

  • The Stress Recognition subscale lacks construct validity within the SAQ's safety climate framework.
  • Recommend omitting Stress Recognition from overall safety climate scores.
  • Advocate for characterizing Stress Recognition as a distinct organizational construct for accurate interpretation and intervention development.