 TIME Targeted Interdisciplinary Model for Evaluation and treatment of neuropsychiatric symptoms is a multicomponent intervention based on the theoretical framework of cognitive behavioral therapy CBT.The TIME trial includes a three months cluster randomized trial in 36 nursing homes with 164 participants with dementia and a high level of agitation. Each nursing home defines a cluster and will be randomized to receive either the intervention with TIME or a brief two hours education-only intervention about dementia and NPS for the control group. TIME consists of a manual based multicomponent program which includes a rigorous assessment, the treatment, and the evaluation of neuropsychiatrc symptoms NPS. The staff, physicians and nursing home managers receive a one-day education. Three nurses from each unit will receive further education including practical and theoretical training for three hours. Measurements at patient level are taken at baseline prior to randomization and at eight and twelve weeks. The primary outcome measure is agitation. Mixed methods will be used to follow, measure and explore the implementation process and the effect at individual staff level and at organization level. 