Larry Nelson is not Lertap's only architect, but he's been the main one, having shepherded the system through several versions, and numerous host institutions.
Larry completed a BSc in electrical engineering at Wisconsin (1964); an MSc in Educational Psychology at Wisconsin (1970); and a PhD in Educational Psychology (psychometrics) at Colorado in 1973.
He's held a number of academic and non-academic posts in the United States, New Zealand, Venezuela, Thailand, and Australia. All have had something or other to do with applied statistics, data analysis, test development, data banking, and computers.
At July, 2014, Larry was said to be wearing these hats:
South Fremantle, Western Australia
School of Education
Perth, Western Australia
College of Research Methodology & Cognitive Science
Miss Angela's Touring, Camping, & Fishing Excursions
Click here for contact information (even has a picture).