Measurement methods Flashcards
RULA
Rapid upper limb assessment
1 - 6+ scale (highest is 6+)
4 levels of MSD risk
REBA
Rapid Entire body assessment
1 - 11+ scale
5 levels of MSD risk (lowest is only 1)
Strain Index
Measurement of risk to hand, wrist, forearm, or elbow Evaluates - intensity of exertion - duration of exertion - exertions per minute - hand/wrist posture - speed of work - duration of task per day Scale 1 - 7+ 3 levels of risk: below 3; 3 - 7; above 7
NIOSH lifting equation
To calculate the recommended weight limit (RWL) and risk of a low back injury H - horizontal (has the biggest impact) V - vertical (starting distance) D - travel vertically F - frequency A - angle of load (twist) C - coupling or quality of the grasp
Load Index
1 to 3
5 risk categories 1.00 lowest and >3.00 highest
Observational usability method
user testing, ethnographic, recordings
Inspection usability methods
cognitive walkthrough, heuristic review, task analysis
Inquiry usability methods
Surveys, focus groups, contextual observation, interviews
Formative usability
Done during the development of a product or systems
Summative
Done after a product or system has been developed
Describing users
Personas, user profiles
selective attention
single task
must switch attention between multiple information sources
focused attention
single task
must focus attention on one source, ignoring others
divided attention
performing two tasks
impacted by psychology refractory period
multiple resource theory related to this
WBGT
Wet bulb global temperature
Index of environmental heat load
calculated with the natural wet bulb temperature; globe temperature; dry bulb temperature
RPE
Borg’s Reported Physical Exertion
6 perceiving “no exertion at all” to 20 perceiving a “maximal exertion” of effort.
