Worker Role Interview

Severe Mental Illness (Bejerholm & Areberg, 2014; n = 120; mean age = 38 (9.25); mean time post first psychiatric contact = 14 (11) years; Swedish speaking)

• SEM for entire group (n = 120): 2.49

Severe Mental Illness (Bejerholm & Areberg, 2014)

• MDC for entire group (n = 120): 6.9

Severe Mental Illness (Bejerholm & Areberg, 2014)

• MCID = 4.89

Chronic Mental Illness: (Morlan & Tan, 1998; n = 27; mean age = n/a; mean time post psychiatric contact = n/a; 9 with schizophrenia, 4 with schizoaffective disorder, 3 with bipolar disorder, and 2 with mild retardation)

• Adequate concurrent validity when correlated with the total scores of the Brief Symptom Inventory, as represented by the General Severity Scale (r = 0.55, p < 0.01), the Positive Symptom Total (r = 0.56, p < 0.01), and the Positive Symptom Distress Index (r = 0.50, p < 0.01)

Severe Mental Illness (Hansson & Bjorkman, 2005; n = 92; mean age = 47 (9.75); mean duration of illness = 22 (9.25) years; 46 with schizophrenia, 14 with other psychosis, and 17 with no psychosis; Swedish speaking)

• Adequate construct validity when correlated with quality of life which was measured by the Manchester Short Assessment of Quality of Life (r = 0.58, p < 0.05)

Severe Mental Illness: (Lohss, Forsyth & Kottorp, 2012; n = 34; mean age = 39 (9.25); mean time post psychiatric contact = n/a; 14 with schizophrenia, 6 with depressive disorder, 5 with personality disorder, 3 with bipolar disorder, 2 with neurotic/anxiety disorder, 1 with anorexia nervosa, 1 with adjustment reaction, and 2 with no diagnosis)

• No ceiling and floor effects could be discerned in a sample of persons with mental illness.

Back Cervical injury/ Extremity Injury:  (Velozo, C.A et al., 1999; n = 42; mean age = 40.1(9.0); Clients diagnosed mainly with back injury and some with extremity injury.)

• Poor predictive validity of the WRI in return-to-work measurement (n = 42, r = 0.33- 1.00)

Back Cervical injury/ Extremity Injury:  (Velozo, C.A et al., 1999)

• All items formed a unidimensional construct except for the work setting and boss environment items, indicating there may be a problem in the definition of the items.

Back Cervical injury/ Extremity Injury: (Velozo, C.A et al., 1999; n = 119; mean age= n/a; Clients with low back injury.)

• Though clients had a tendency to score higher than the mean on the WRI scale, no ceiling or floor effects were observed.

Musculoskeletal Disorder:

(Koller, B. et al, 2011; n = 20; mean age = 40.2 (9.24) years; participants had a work related MSD (low back, neck or shoulder pain); Swiss, German speaking sample.)

• SEM for entire group (n = 20): .827

Musculoskeletal Disorder: (Koller, B. et al, 2011)

• MDC for entire group (n = 20): 2.29

Musculoskeletal Disorder: (Biernacki, S.D., 1993; n = 30; mean age = 37.8 years; participants received rehab due to upper extremity injury.)

• Excellent test-retest reliability: (ICC = .95)

Musculoskeletal Disorder: (Koller, B. et al, 2011)

• Excellent inter-rater reliability: (ICC = 0.86 to 0.94)

Musculoskeletal Disorder: (Koller, B. et al, 2011)

• With the removal of item 15 (perception of boss/and or company), the Rasch analysis indicates only slight deviation between the observed data and what was expected from the model at group level.