NGOMSL

A structured notation for writing GOMS (Goals, Operators, Methods, Selection rules) models in a program-like form that is readable by humans. NGOMSL was developed by David Kieras as a more formal variant of GOMS that includes selection rules and allows operators at the keystroke level. In accessibility research, NGOMSL has been adapted to model blind users' interactions with screen readers, incorporating extensions such as verification steps and choice sets to account for the non-visual navigation strategies that screen reader users employ.