Description: The Mobile Phone Addiction Scale is a 37-item self-report measure that is used on Adults to measure mobile phone excessive usage, leading to poor mental health and behavioural disturbances, problematic interpersonal relationships, and clinically diagnosed psychological disturbances. It was developed by Dr. A. Velayudhan and Dr S. Srividya in 2012. It has six subscales: Maladaptive Usage, Self-Expression, Peer Relationship, Interpersonal Relations, Impulsivity and Usage Time. The scale's psychometric properties are satisfactory and the results obtained on the testing sample were statistically significant. The scale might also aid researchers, and school/college/adolescent counsellors who would be examining the problematic usage of mobile phones leading to poor mental health and behavioural disturbances, problematic interpersonal relationships, social withdrawal and clinically diagnosed psychological disturbances.