The Management Standards Indicator Tool (MSIT) is a 35-item self-report measure of thepsychosocial work environment designed to assist organizations with psychosocial risk assessment.It is also used in work environment research. Edwards and Webster presented a 25-item version ofthe MSIT based on the deletion of items having a factor loading of <.65. Stress theory and researchsuggest that psychosocial hazard exposures may result in harm to the health of workers. Thus, usingdata collected from three UK organizations (N = 20,406) we compared the concurrent validity of thebrief and full versions of the MSIT by exploring the strength of association between each version ofthe instrument and a measure of psychological wellbeing (GHQ-12 and Maslach BurnoutInventory). Analyses revealed that the brief instrument offered similar but not always equal validityto that of the full version. The results indicate that use of the brief instrument, which would be lessdisruptive for employees, would not elevate the risk of false negative or false positive findings inrisk assessment.