Problems in Human Assessment

1969 ◽  
Vol 6 (1) ◽  
pp. 104
Author(s):  
Max D. Engelhart ◽  
Douglas N. Jackson ◽  
Samuel Messick ◽  
William A. Mehrens ◽  
Robert L. Ebel
Keyword(s):  
Author(s):  
Waldemar Karwowski

This main objective of this study was to introduce and investigate the concept of load of perceptual indifference (LPI) for assessment of load heaviness in manual lifting tasks. The loads of perceptual indifference were defined as those box weights which would result in the same values of subjective compatibility scores for a given pair of perceptual categories of load heaviness. At the point of indifference, the loads are perceived as to be acceptable, safe or not-too-heavy with an equal strength as the loads judged to be too-heavy for continuous lifting. The linguistic magnitude estimation (LME) method (Karwowski, 1990) was used for experimental and modeling purposes. This allowed to develop a quantitative model for the human assessment of four categories of lifted loads of interest. The results indicate that the lack of cognitive benchmark introduces inconsistency in subjects perception of load acceptability and safety compared to the concept of to-heavy load. In order to overcome this problem, a new research approach to manual lifting tasks is needed, based on the integration of cognitive engineering, active psychophysics and ecological approach.


TECHNOLOGY ◽  
2019 ◽  
Vol 07 (03n04) ◽  
pp. 98-107 ◽  
Author(s):  
Josh M. Leipheimer ◽  
Max L. Balter ◽  
Alvin I. Chen ◽  
Enrique J. Pantin ◽  
Alexander E. Davidovich ◽  
...  

Obtaining venous access for blood sampling or intravenous (IV) fluid delivery is an essential first step in patient care. However, success rates rely heavily on clinician experience and patient physiology. Difficulties in obtaining venous access result in missed sticks and injury to patients, and typically require alternative access pathways and additional personnel that lengthen procedure times, thereby creating unnecessary costs to healthcare facilities. Here, we present the first-in-human assessment of an automated robotic venipuncture device designed to safely perform blood draws on peripheral forearm veins. The device combines ultrasound imaging and miniaturized robotics to identify suitable vessels for cannulation and robotically guide an attached needle toward the lumen center. The device demonstrated results comparable to or exceeding that of clinical standards, with a success rate of 87% on all participants ([Formula: see text]), a 97% success rate on nondifficult venous access participants ([Formula: see text]), and an average procedure time of [Formula: see text][Formula: see text]s ([Formula: see text]). In the future, this device can be extended to other areas of vascular access such as IV catheterization, central venous access, dialysis, and arterial line placement.


2019 ◽  
Vol 47 (2) ◽  
pp. 141-152
Author(s):  
Atle Frenvik Sveen ◽  
Anne Sofie Strøm Erichsen ◽  
Terje Midtbø

1982 ◽  
Vol 26 (2) ◽  
pp. 167-171 ◽  
Author(s):  
Michael J. Rosen ◽  
Cheryl Goodenough-Trepagnier

The problem of prescribing alternative communication systems for motor disabled non-vocal people is outlined. Attention is called to the diverse, multi-dimensional character of the human assessment problem. Techniques under development for finding the optimal match between descriptive profiles of patients and available devices are presented. Emphasis is given to the essential involvement of computers in the proposed methodologies.


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