The Society for Information Display, SID, is an important organization for the display industry and anyone involved in displays or display related products. Within the organization is the Definitions and Standards Committee that includes the International Committee for Display Metrology, ICDM.
The ICDM makes available as a free download the Information Display Measurements Standard. This 563 page PDF covers an extensive range of metrics relating to displays. They even have sections on touch screen performance measurement.
The report was released in 2012 so clearly, there will be some technology references that are now out of date, however, it doesn’t diminish the value as a reference for measurement methods.