2.3.1. Workplace Bipolar Inventory (WBI)
Workplace Bipolar Inventory is a newly developed self-rating
39-item questionnaire for use at the workplace. It was developed
with input from two sources, a panel of specialists and items from
an already-established inventory. Eight practitioners of occupational
mental health were asked to report the observed specific
symptoms or behaviors of cases with bipolar disorder type I and II
in workplace settings. From their reports, 128 items of specific
symptoms or behaviors were collected as an item pool and four
large categories (including 17 small categories) were created by two
occupational mental health specialists and five graduate school
students majoring in occupational mental health using the KJ
Method (Scupin, 1997). One to three items were selected among
each category for WBI, and provisionally 35 items were included.