Civil Engineering Reference
In-Depth Information
Activity Score
¼
þ
1 (rapid large change in posture)
REBA SCORE
11. Action level 4. Very high risk level, action is necessary NOW
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42.4 Reliability and Validity
42.4.1 Reliability
In the development stages of REBA, the reliability was tested by using over 600 examples of postures from
the electricity, health care, and manufacturing industries. The examples were coded by 14 professionals
(occupational therapists, physiotherapists, nurses, and ergonomists). The reliability of the upper arm
posture score (56%) was excluded due to the addition of the gravity-assisted code during the reliability
testing. The results were analyzed by body part (Figure 42.7) with an agreement rate of between
62 and 85%.
This was felt to be a satisfactory interrater reliability for this stage of development with such a large
group. In comparison, Suurn¨kki et al. (1988) reported achieving a reliability range of 74-99% with
OWAS with only six experts (Corlett, 1998). Hignett (1998) reported a 96% agreement with only two
participants in an interrater reliability study.
42.4.2 Validity
REBA has very good face validity and is widely used internationally. External validity has been achieved
through use in a range of industries and it considered to present generalizable results within the context
of a full ergonomics workplace assessment.
Filling Medical Notes
REBA-Score Sheet
Group A
Group B
L R
Trunk
Use Table A Use Table B
Upper Arms
L R
Lower Arms
Neck
L R
Legs
Wrist
Load/Force
Coupling
Score B
Score A
Use Table C
Score C
Activity
Score
REBA Score
FIGURE 42.5
Filing medical notes.
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