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Table 3 Exploratory factor analysis

From: A survey of stakeholder perspectives on exoskeleton technology

Exoskeleton design features Factor 1 (Technology characteristics) Factor 2 (Functional activities)
Purchase cost 0.778  
Repair and maintenance cost 0.758  
Comfort 0.701 -0.128
Ease of putting on and taking off the device 0.694  
Minimizes risk of falling 0.659 -0.107
Amount of energy needed for use 0.659  
Length of training to become proficient 0.509  
Overall appearance 0.375 -0.107
Ability to climb stairs -0.212 -0.855
Ability to carry out daily tasks while standing   -0.757
Ability to use to get in and out of a car   -0.731
Ability to walk on uneven surfaces 0.110 -0.672
Walking speed   -0.573
Ability to toilet 0.142 -0.495
Portability of the device 0.395 -0.471
Range of battery life 0.310 -0.459
Ability to use without arm crutches 0.171 -0.419
  1. Associations (i.e. loadings) of individual design features and the two factors (i.e. categories) are revealed through exploratory factor analysis. Higher numbers indicate a stronger association between the design feature (variable) and the factor, where > .71 are considered excellent, >.63 are considered very good, >.55 are considered good, and > .45 are considered fair. Values between -0.100 and 0.100 have been excluded from this table. These loadings allow the design features to be grouped into two major categories, where Factor 1 represents Technology Characteristics and Factor 2 represents Functional Activities. Italicized loading values indicate the factor which the design feature was grouped into.