sometimes be utilised by occupational therapists in the psychosocial rehabilitation of their patients. outdoor therapy outdoor work has been documented as an effective method of therapy for those who experience mood-related issues caused by sad during the winter season in denmark. there is also evidence of horticulture groups causing positive impacts on depressive impacts. similarly, outdoor walking can provide a “therapeutic effect” to individuals with sad that is on par with light therapy. the impact of these activities can be considered a psychosocial method of managing sad that can be utilised by occupational therapists to develop and maintain healthy occupational performance in patients with sad. assessment of sad occupational therapists play a role in the assessment and ongoing evaluation of clients who have, or are suspected to have, sad. these assessments are most often a method of determining the aspects of the disorder requiring most immediate attention, and to examine the effectiveness of a chosen treatment on a patient. there are two commonly used assessments for sad. the first is the structured interview guide for the hamilton rating scale for depression –seasonal affective disorder version (sigh-sad). this method involves a semi-structured interview that includes 21 non-seasonal depression items and an extra 8-item sad-specific sub-scale, which allows occupational therapists to determine the specific client's problems and potentially effective management strategies that they can implement. the second assessment method is the beck depression inventory, 2nd edition (bdi-ii). this method is generally accepted as being faster to administer. it contains 21 measures of depressive symptom severity, and also captures atypical symptoms that are common in sad.