Experience

Global Psytech

• Malaysia
• IT Services and IT Consulting
• 1 - 100 Employee

• Chief Data Scientist

  • Jul 2017 - Present



ISLA

• 1 - 100 Employee

• Director and Research Professor at the Laboratory for Statistics and Computation at ISLA

  • Aug 2013 - Present



Integrated Knowledge Systems (IKS)

• CEO

  • 2004 - Present

  IKS assists its partners and clientele with the selection and implementation of innovative methods in applied statistics and software design, thereby maximizing ROI. Past and current projects include workforce forecasting and optimization, similarity matching and diagnostics in online dating, process mining, computer adaptive testing (CAT), quality control in crowd sourcing, and the development of customized assessment systems. Examples of the latter include rater evaluation in educational (large scale) assessment, worker evaluation in crowd sourcing, teacher evaluation, self-calibrating item banks, and the design of self-adapting games to stimulate and maintain students' interests. CAT experience includes algorithm design and implementation, item development, dynamic pilot testing, item selection, construction of vertical scale and general norming, implementing termination tests based on sequential statistics. Research activities include the integration of multiple-choice and computer scored answers to open ended questions in real-time within a single CAT system - and IKS currently is/was active in several countries, including Brazil, Canada, Malaysia, the Netherlands, Portugal, Spain, and the USA.



Illinois State Board of Education

• Education Administration Programs
• 400 - 500 Employee

• Psychometrician

  • 1997 - 2012

  Design and/or verify psychometric scaling, equating, and (rater based) scoring procedures for state mandated educational content area tests for over 1.5 M students across 7 grades and 4 content areas. Identify and remedy rater biases in the grading of over 2 M student written essay questions. Supervise the work of several large-scale testing contractors employed by the State of Illinois, including ACT, Pearson, and Metritech. Additional activities include: providing item writing guidance, standard setting, test construction, test administration, quality control, score equating, analysis of international testing results (TIMMS), writing technical manuals and reports, interacting with state and national news media concerning Illinois' test scores and performance results, write proposals to ensure state conformance with federal law and guidelines, present findings at national and international conferences.



University of Illinois at Springfield

• United States
• Restaurants

• Professor of Computer Science / Psychology

  • Sep 1986 - Jan 1997

  Taught graduate and undergraduate courses in Psychology and Computer Science. Advised Master's level students in both areas. Courses taught include: statistics, cognitive psychology, theory and implementation of modern programming languages, compiler design leading to students' implementation of the Pascal language into P-code, and artificial intelligence. Research on machine learning, criminology, personality testing, and Rasch scaling issues. Taught graduate and undergraduate courses in Psychology and Computer Science. Advised Master's level students in both areas. Courses taught include: statistics, cognitive psychology, theory and implementation of modern programming languages, compiler design leading to students' implementation of the Pascal language into P-code, and artificial intelligence. Research on machine learning, criminology, personality testing, and Rasch scaling issues.