“…External factors can influence components within the TPB (Werner and Grayzman, 2011). Research has identified several external factors including age (Crothers and Dorrian, 2011), personal alcohol use (Crothers and Dorrian, 2011), personal and professional experiences with patients (Chung et al, 2003;Giannetti et al, 2002) and support (Chung et al, 2003). Werner (2012) was one of the few researchers to utilize the TPB in this area, investigating social work, special education, nursing, occupational therapy and speech therapy students (N = 476) intention to care for individuals with dual diagnosis (co-morbid mental illness and substance abuse problem).…”