Amy G. Froelich
Department of Statistics
Iowa State University
3109 Snedecor Hall
Ames, IA 50011-1210
Phone: (515) 294-5584
Fax: (515) 294-4040
Office Hours for Fall 2012: M 2-3, W 2-4, R 2-3
Research and Scholarship
- Statistics Education
My primary research interest is in the field of statistics education. I am involved in several area of research including
Here are some journals that publish research in statistics education.
- Formative Assessment in Introductory Statistics Using Clickers - developing clicker questions based on Bloom's taxonomy designed for use as formative
assessment in introductory statistics.
- Development of New Assessment Model in Introductory Statistics - developing and implementing a new assessment model in introductory statistics combining more traditional assessments with formative assessments through technology (clickers and online homework).
- Development and assessment of materials for Introductory Statistics - developing materials to enhance student learning and understanding of concepts in introductory statistics.
- Development and assessment of materials for calculus-based probability and mathematical statistics - developing curriculum to extend the reform
movement in statistics education based on conceptual understanding and data analysis to the traditional calculus-based probability and mathematical
statistics course sequence. Materials incorporate the use of the statistical language R.
- Training graduate students to teach statistics - involved in mentoring activities for graduate students in statistics on developing teaching skills.
Developed in Fall 2008 a series of seminars to train first-year graduate students in statistics in teaching responsibilities.
- Training K-12 teachers and community college teachers to teach statistics - developed and taught a new course for the Master of School Mathematics
program at Iowa State University to help students obtain the content and pedagogy knowledge necessary to teach college introductory statistics and/or
Advanced Placement Statistics.
There are several professional organizations in the field of statistics education.
- Psychometrics and Educational Measurement
My research interest in the fields of psychometrics and educational measurement is in the area of Item Response Theory, or IRT. IRT is concerned with
modeling examinee response to test questions or items (particularly dichotomous and polytomous) using a latent variable statistical model. I have worked
in several areas of research in this field, including
Here are some journals devoted to publishing research in the fields of psychometrics and educational measurement. They are
- Differential Item Functioning (DIF) - determines whether the probability of an examinee correctly answering an item varies based on the examinee's gender,
social, or racial group. Comparisons are always made between examinees with approximately the same level of ability. Thus, we seek to find an item or
groups of items where, all other things being equal, there is a difference in examinee performance based on characteristics of the examinee.
- Dimensionality Assessment - determines the number of dominant dimensions represented on a test. For example, does a math test just have one dominant
dimension, or does the math test divide into algebra, geometry, and trigonometry dimensions.
- Estimation - estimates parameters related to both the test items and examinee abilities based on the test responses. Generally, these parameters are
estimated by maximizing a particular type of likelihood function or are estimated using nonparametric methods.
- Computer Adaptive Tests (CAT) - item selection and security, examinee ability estimation, dimensionality assessment with CAT items, and DIF assessment
with CAT items.
There are several professional associations in the field of educational measurement and psychometrics. They include