Gifted Development Center
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Director, Dr. Linda Silverman, awarded "Special Advocate 2007" distinction

Linda Kreger Silverman, Ph.D., is a licensed clinical and counseling psychologist, who has contributed over 300 publications to the field, including the textbook, Counseling the Gifted & Talented, and Upside-Down Brilliance: The Visual-Spatial Learner. She founded and directs the Institute for the Study of Advanced Development (ISAD), and its subsidiary, the Gifted Development Center (, which has assessed over 5,500 children in the last 29 years. In addition, she founded Visual-Spatial Resource (, another subsidiary of ISAD. For nine years, she served on the faculty of the University of Denver in counseling psychology and gifted education. Co-Chair of the NAGC Task Force on Assessment, she organized the first symposium on assessment of the gifted in conjunction with the World Council for Gifted Children Conference in 2005 and the second symposium in Los Angeles in 2009. Advising major testing companies, she was a member of the expert Advisory Panel for the Stanford-Binet Intelligence Scale, Fifth Edition, and has been instrumental in the development of extended norms for the WISC-IV.











































The GDC Staff
  Linda Silverman  

Director; Counselor

Linda Kreger Silverman, Ph.D., is a licensed psychologist.  She founded the Institute for the Study of Advanced Development, and its subsidiaries, Gifted Development Center (GDC) ( and Visual-Spatial Resource ( in Denver, Colorado. In the last 33 years, she has studied 6,000 children who have been assessed at GDC, the largest data bank on this population. This research enabled the creation of extended norms on the WISC-IV and WPPSI-IV. Her Ph.D. is in educational psychology and special education from the University of Southern California. For nine years, she served on the faculty of the University of Denver in counseling psychology and gifted education. She has been studying the psychology and education of the gifted since 1961 and has written over 300 articles, chapters and books, including Counseling the Gifted and Talented, Upside-Down Brilliance: The Visual-Spatial Learner and Advanced Development: A Collection of Works on Gifted Adults. Her latest book, Giftedness 101, was released early in 2013 (New York: Springer).

To view Linda's Curriculum Vitae, please click here.

Please visit Linda's Column!
  Bobbie Gilman  

Associate Director; Examiner

Barbara ("Bobbie") Gilman, M.S., serves as Associate Director of the non-profit Gifted Development Center in Denver, where she specializes in school advocacy consultation with parents worldwide, and diagnosis and recommendations for moderately, highly, exceptionally and profoundly gifted children, as well as gifted children with learning disabilities, AD/HD, and underachievement issues.

She chairs the National Association for Gifted Children's (NAGC) Assessments of Giftedness Special Interest Group in its ongoing efforts to research comprehensive intelligence tests, suggest best practices for their use with gifted children, and work with test developers and publishers to improve gifted assessment.

Bobbie's award-winning book, Academic Advocacy for Gifted Children: A Parent's Complete Guide (2008), guides parents through the process of documenting the unique instructional needs of a gifted student, finding curricular options that meet the child's needs, and negotiating with school personnel for programming accommodations. Challenging Highly Gifted Learners (2008), written for educators, addresses educational planning for highly, exceptionally, and profoundly gifted students. A recent concern for her is finding ways to document the needs of twice exceptional students-who are both gifted and have weaknesses-for classroom accommodations, as many school districts have cut back the comprehensive assessment needed to identify them.


Barbara Gilman, M.S.
(See Associate Director)


Nancy B. Miller, Ph.D., holds degrees in psychology and sociology and has received advanced training in family processes and children’s psychological adjustment. She is editor of Advanced Development, a journal on adult giftedness, and currently does research and testing at the Gifted Development Center. She has taught courses at the undergraduate and graduate level at the University of Denver and the University of Akron, including socialization; children, youth and society; and sociology of the family. From 2002-2006, she served as Executive Officer of Sociologist for Women in Society. She has worked with Dr. Silverman for the past 25 years and is committed to fostering children’s social and emotional development at home and at school. She brings a sociological perspective to the assessment of children at the Gifted Development Center.

  Ann   Ann W. DeMers, M.A., N.C.S.P., Associate, holds a Master's degree in Special Education and a state license as well as national certification in School Psychology.  She has recently retired with 31 years of experience in Jefferson County Schools as a special educator, classroom teacher and school psychologist. Ann’s experience includes teaching conflict resolution, anger management and social skills and supporting students with severe emotional disabilities. She has training and experience with students who are Twice Exceptional. Ann has been an examiner at the Gifted Development Center since 2003.
  Connie   Connie C. Tucker, M.S., N.C.S.P., Associate, holds a Master's degree in School Psychology, and a Diplomate in School Neuropsychology. She has held state and national certificates in school psychology since 1988. Connie recently retired after working for 20 years in Jefferson County Schools where she conducted psychological assessments to determine learning disabilities or emotional disorders, counseled at-risk children, and consulted with teachers to develop interventions to help children become successful in school.  Connie has assessed gifted children at the Gifted Development Center since 2000.  As the mother of gifted daughters, she has learned through experience the joy of giftedness and the need for advocacy for gifted children.
      Marni Choice-Hermosillo, Ed.S., N.C.S.P., Associate, has been assessing children at the Gifted Development Center since 1998 and has extensive experience evaluating all ranges of gifted children, twice exceptional learners, and children with emotional difficulties. Marni holds an Educational Specialist degree from the University in Denver, a license in School Psychology and a certification with the National Association of School Psychologists. In addition to GDC, Marni has been working as a school psychologist since 2000 and presently is employed by Jefferson County Public Schools. Marni and her husband are raising two children and Marni has returned to the University of Denver to complete her Ph.D. in school psychology with an emphasis in neuropsychology.
  Kimberly Carroll Boham, M.A.E., earned her undergraduate degree in Elementary Education from Wayne State College in 1991.  She taught for 7 years in Millard Public Schools  (Omaha, NE) as a 4th and 5th grade classroom teacher.  During this time she discovered her passion for teaching gifted children and completed her Masters degree in Curriculum and Instruction with an endorsement in Gifted Education from the University of Nebraska-Lincoln (1999).  After staying home for several years to take care of her four young children, Kim returned to teaching in the role of a Gifted Coordinator in Millard.  She was heavily involved in her district’s revision of their gifted program identification process, and this involvement became the catalyst for her interest in all areas of gifted identification, particularly IQ testing.  Kim currently works part-time as a Gifted Coordinator in Elkhorn Public Schools in Elkhorn, NE.  She works directly with gifted children and supports their classroom teachers to meet their needs through best practices in gifted education.   Kim travels monthly to Denver from Omaha to work as an examiner at the Gifted Development Center and to enhance her experience and knowledge in the area of assessment and identification of gifted children. As the mother of gifted and talented children, Kim understands the importance and necessity of identification and advocacy for gifted children.
      Connie Cox, M.S., is licensed by the State of Colorado as a School Psychologist. She holds a Master's Degree in Education and completed Post-Masters certification and licensure programs in School Psychology and Educational Administration. She has extensive training in assessment, diagnosis and treatment planning for both school and clinical populations. During her tenure as a teacher, she developed a branch of the Gifted Education Program in her school district for children with visual spatial giftedness. Connie retired after serving 21 years as a school psychologist in Jefferson County Schools. She truly enjoyed her role as counselor, consultant, diagnostician, interventionist, and crisis responder. She finds it a pleasure and honor to be a part of GDC's phenomenal staff so dedicated to recognizing the gifts of your children and creating a better world in which for them to live.
  Dawn   Dawn Kinard, M.S. - currently on extended leave, holds a Master's degree in Special Education from Texas A&M University, and certifications as an Educational Diagnostician, Pre-K through 12, ESL, and Special Educator.  Prior to relocating to Denver, she was employed by the Dallas Independent School District where she provided psycho-educational evaluations and developed individualized education plans for students with learning disabilities. Previously, she spent three years teaching the gifted. In addition, she screened and identified gifted students, and chaired the committee that admitted students into the gifted program. Her background as a Special Educator influenced her advocacy for including twice exceptional learners in gifted programs.

Linda Silverman, Ph.D.  (See Director)


Michael Davis, Ph.D., Staff Counselor, has been a psychotherapist in private practice in Colorado since 1981. He has worked with gifted children and their families as the staff counselor at the Gifted Development Center, in Denver, for almost 30 years. In addition, he has taught graduate school classes at Denver University’s Center for Teaching International Relations and delivered numerous presentations at Gifted Conferences and Myers-Briggs Type Indicator™ Conferences.

Michael is also a Certified Imago Therapist and Couples Workshop Presenter, and has been sharing the benefits of Imago Relationship Therapy with his clients since 1998. He helps his clients understand and integrate the skills and practices that make relationships work. Michael likes to compare relationships to canoeing down a river. One thing he guarantees is that there are rapids downstream. Therefore he teaches people to paddle in calm waters, to navigate through rapids and, if they tip over, how to get back in the canoe. He does this with insight, warmth, and gentle humor. To learn more about him, the services he offers, and “Imago,” please visit his website.

      Dave Atkinson, is a Licensed Professional Counselor currently on extended leave.  He joined the Gifted Development Center as an intern in 1993, while working on his Master's Degree in Clinical Psychology.  His expertise in assessment led him to become our first Director of Staff Development.  Dave specializes in career development, counseling, tutoring and preparation for the SAT, ACT, GRE and LSAT. 

Professional Affiliates

Linda Powers Leviton, M.A., MFT, Consultant & Director, West Coast Office of the Gifted Development Center office, has been in private practice as a Licensed Marriage, Family and Child Therapist since 1996. Prior to that, she taught gifted children and raised three of her own. Linda Leviton and Linda Silverman have worked together since 1974. They co-authored "In Search of the Perfect Program," which serves as a basis for helping parents find appropriate educational environments for their children.

Michael M. Piechowski, has a Ph.D. in molecular biology and a Ph.D. in counseling psychology, both from the University of Wisconsin-­Madison. He is a Senior Fellow of the Institute for Educational Advancement and Professor Emeritus of Education and Psychology, Northland College, Ashland, Wisconsin Co-author of Theory of Levels of Emotional Development (2 vols.) with Kazimierz Dabrowski, Michael has written extensively on the developmental potential and emotional development of the gifted, including the book, "Mellow Out," They Say, If I Only Could.

Kathi Kearney, M.A. Ed., is the founder of the Hollingworth Center for Highly Gifted Children, a national resource and support network for exceptionally gifted children and their families. She has worked with gifted children as a teacher and administrator in a wide variety of settings, urban and rural, in public, private, religious, and home schools. Kathi is a recognized expert on homeschooling exceptionally gifted children. An excellent diagnostician, she works primarily in New England.

Ellen D. Fiedler, Ph.D., Professor Emerita of Gifted Education at Northeastern Illinois University in Chicago, is a consultant who regularly provides professional development for school districts and other educational agencies, presentations for parents, and webinars. She has a Ph.D. in Counseling and Guidance from the University of Wisconsin-Madison and has been a Gifted Program Coordinator and a State Consultant for Gifted. Dr. Fiedler has provided consultation services and presentations in the United States, Canada, Australia, and Russia. She is a published author and a regular presenter at state, national, and international conferences, including eight World Congresses on the Gifted and several biennial conferences of the European Council for High Ability. She has been Chair of the Counseling and Guidance Division of the National Association for Gifted Children (NAGC) and co-chair of the Global Awareness Division of NAGC. She lives in Florida during the winter and in Michigan in the summer.

Christine S. Neville, Ed.D., works as an advocate for highly gifted children through the Cheetah Project. She has worked at all levels of public schools beginning as a classroom teacher, as a resource teacher, then Supervisor for gifted and talented programs. She is published in High IQ Kids: Collected Insights Information, and Personal Stories from the Expert. She served as a high school principal in Clarke County and Charlottesville, Virginia and in Camden, Maine. Her doctorate is from the University of Virginia, where she helped develop the Summer Enrichment Program (SEP) for Gifted Students and taught graduate level courses in Gifted Education. She founded and served as Director of the Mary Baldwin College Program for the Exceptionally Gifted (PEG) and was founder and Head of School for the Academy for Gifted Children in Cincinnati, Ohio. She has presented locally, regionally and nationally on classroom management, school leadership and most aspects of gifted education.

  Betty Maxwell  

Betty Maxwell, M.A.

After 22 years of serving in various roles, Betty retired from the Gifted Development Center the summer of 2011. She remains an advisor to the Center and the Institute for the Study of Advanced Development. Betty is currently working on a teacher resource book about visual-spatial learners. The Gifted Development Center, the Institute for the Study of Advanced Development, the Visual-Spatial Resource, and Advanced Development Journal blossomed through her vision, wisdom, and dedication.

In honor of Betty, we have established a fund to continue the essence of her values and contributions. If Betty has touched your life, please help us to preserve her vision for future generations. Donations will be used to:

  • support assessment of giftedness in families with limited means
  • provide a classroom where teachers can learn about visual-spatial learners, parents can learn about how to advocate for their gifted children, and gifted adults can learn how to utilize their own gifts
  • train examiners in the fine nuances of test interpretation of twice-exceptional learners
  • assist therapists in understanding the psychological aspects of development and self-actualization.

We have received challenge grants in the amount of $10,000. Please help us match this challenge.

Donate Now




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Gifted Development Center

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