School Leader Update, February 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, July, 2006

Monthly newsletter produced by Iowa Department of Education

School Leader Update, August, 2006

Monthly newsletter produced by Iowa Department of Education

School Leader Update, March 2010

Monthly newsletter produced by Iowa Department of Education

Using graphical probability analysis (Bayes Nets) to evaluate a conditional DNA inclusion

This paper discusses the analysis of cases in which the inclusion or exclusion of a particular suspect, as a possible contributor to a DNA mixture, depends on the value of a variable (the number of contributors) that cannot be determined with certainty. It offers alternative ways to deal with such cases, including sensitivity analysis and object-oriented Bayesian networks, that separate uncertainty about the inclusion of the suspect from uncertainty about other variables. The paper presents a case study in which the value of DNA evidence varies radically depending on the number of contributors to a DNA mixture: if there are two contributors, the suspect is excluded; if there are three or more, the suspect is included; but the number of contributors cannot be determined with certainty. It shows how an object-oriented Bayesian network can accommodate and integrate varying perspectives on the unknown variable and how it can reduce the potential for bias by directing attention to relevant considerations and distinguishing different sources of uncertainty. It also discusses the challenge of presenting such evidence to lay audiences.

Report on a special investigation of the Cedar Rapids Community School District for the period July 1, 2002 through August 24, 2009

Report on a special investigation of the Cedar Rapids Community School District for the period July 1, 2002 through August 24, 2009

School Leader Update, April 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, May 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, June 2010

Monthly newsletter produced by Iowa Department of Education

Report on a special investigation of the Food Service Department of the Springville Community School District for the period July 1, 2005 through March 31, 2009

Report on a special investigation of the Food Service Department of the Springville Community School District for the period July 1, 2005 through March 31, 2009

School Leader Update, July 2010

Monthly newsletter produced by Iowa Department of Education

Report on the Iowa School for the Deaf, Council Bluffs, Iowa for the year ended June 30, 2009

Report on the Iowa School for the Deaf, Council Bluffs, Iowa for the year ended June 30, 2009

Report on the Iowa Braille and Sight Saving School, Vinton, Iowa, for the year ended June 30, 2009

Report on the Iowa Braille and Sight Saving School, Vinton, Iowa, for the year ended June 30, 2009

School Leader Update, August 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, September 2010

Monthly newsletter produced by Iowa Department of Education