Is accuracy and latency estimation...
Ecologically valid? Reading Tutor used in school
Authentic? kids choose stories
Unobtrusive? evaluate assisted reading invisibly
Automatic? align recognizer output against text
Fast? real-time on Pentium
Robust? to much student, recognizer, and tutor behavior
Data-rich? 10498 utterances, 139133 aligned words
Sensitive? detects significant but subtle effects (< 0.1 sec)