A Technique for Assessing Postural Discomfort

Corlett, E.N.; Bishop, Richard P.

doi:10.1080/00140137608931530

Cited by 836 publications

(291 citation statements)

References 5 publications

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“…However, poor posture, especially upper limbs posture, in which novice and expert largely differ during the laparoscopic training [10], can cause static muscle load and fatigue [11] as well as impaired psychomotor task performance [12]. Normally, trainees always receive advice and feedback from expert doctors on their posture during training.…”

Section: Laparoscopic Trainingmentioning

confidence: 99%

Development of subliminal persuasion system to improve the upper limb posture in laparoscopic training: a preliminary study

et al. 2015

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give advice on improving trainees' posture. However, a poor posture can result in increased static muscle loading, faster fatigue, and impaired psychomotor task performance. In this paper, the authors propose a method, named subliminal persuasion, which gives the trainee real-time advice for correcting the upper limbs posture during laparoscopic training like the expert but leads to a lower increment in the workload.Methods: A 9-axis Inertial Measurement Unit (IMU) was used to compute the upper limbs posture, and a Detection Reaction Time (DRT) device was developed and used to measure the workload. A monitor displayed not only images from laparoscope, but also a visual stimulus, a transparent red cross superimposed to the laparoscopic images, when the trainee had incorrect upper limbs posture. One group was exposed, when their posture was not correct during training, to a short (about 33 ms) subliminal visual stimulus. The control group instead was exposed to longer (about 660 ms) supraliminal visual stimuli.Results: We found that subliminal visual stimulation is a valid method to improve trainees' upper limbs posture during laparoscopic training. Moreover, the additional workload required for subconscious processing of subliminal visual stimuli is less than the one required for supraliminal visual stimuli, which is processed instead at the conscious level. Conclusions:We propose subliminal persuasion as a method to give subconscious real-time stimuli to improve upper limbs posture during laparoscopic training. Its effectiveness and efficiency were confirmed against supraliminal stimuli transmitted at the conscious level: subliminal persuasion improved upper limbs posture of trainees, with a smaller increase on the overall workload.

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Section: Laparoscopic Trainingmentioning

confidence: 99%

Development of subliminal persuasion system to improve the upper limb posture in laparoscopic training: a preliminary study

et al. 2015

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show abstract

“…A large number of methods for the assessment of comfort and discomfort have been presented (Shackel et al 1969, Corlett and Bishop 1976, Wachsler and Learner 1960, Le Carpentier 1969, Bendix and Hagberg 1984, Barkla 1964. Questionnaires and interviews have been common techniques, in which the subjects have been asked to assess their judgements of the chair, choosing between verbal statements.…”

Section: Comfortmentioning

confidence: 99%

“…They also used "Body area comfort ranking", a forced-choice technique also used by Bennett et al (1963). Corlett and Bishop (1976) used "Body mapping", a method where the perceived discomfort was rated on a scale and also related to a body part defined by a manikin. Shackel et al (1969) also used a "Chair feature checklist", in which the subjects were asked to select an appropriate statement of nine chair features.…”

Section: Comfortmentioning

confidence: 99%

“…These measures are suitable for field studies, but it has been difficult to obtain significant results when using measures of speed and accuracy of performance. Another method which can beused in field studies is recording of the total length of time periods when the seat or the workplace is used, and the average time in work and in Test for all spells in a comparison between alternative designs (Corlett and Bishop 1976).…”

Section: Assessment Of the Task And Workplacementioning

confidence: 99%

“…The performance decrements are associated with increased muscle tremor, which 74 increases the, time to-perform precis ion'p ositioning tasks (Chaffin 1973)_ It seems reasonable to assume that if the discomfort distracts people from their tasks, the productivity will be decreased. There are however also indirect results which make it probable that unsuitable workplace design causes discomfort and productivity loss (Corlett and Bishop 1976), and that inadequate seating causes fidgeting (Branton and Grayson 1967), which then is likely to cause productivity losses.…”

Section: Productivitymentioning

confidence: 99%

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