The 20-item Toronto Alexithymia Scale (TAS) was developed in 1985 as the first reliable and valid self-report measure of the alexithymia construct. It was modified in 1992 to develop a revised and improved twenty-item version, which is called the Twenty-Item Toronto Alexithymia Scale (TAS-20). The TAS-20 has become the most widely used measure of the alexithymia construct. Articles reporting the development and psychometric properties of the TAS-20 are listed on the Publications page of this website.
Investigators are encouraged to use the TAS-20 in their research on the alexithymia construct. A package containing a master copy of the scale, scoring instructions, reliability, validity, and normative data can be obtained for individual researchers or clinicians upon payment of a copyright fee of US$50.00. Cheques should be made payable to R. Michael Bagby and sent to him at the address below. Please include your email address with your cheque and the package will be sent as an attachment file. Further information about payment in other currencies or about other methods of payment can be obtained from Dr. Bagby.
Dr. R. Michael Bagby
307 Indian Road