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Karen Reif, M.Sc. PsychologyKaren Reif

Karen graduated with a Master of Science (M.Sc.) in Psychology from the University of Copenhagen in December of 2014. While studying, Karen started working as an in-home one-to-one ABA tutor with a child with autism in January 2011, adding a second child to her workload in 2012. Additionally, she worked as a pedagogical support aide in an integrative Kindergarten. In 2013 and 2014, Karen was a group leader for a parents-group (parents of children with disabilities) in Høje Taastrup Kommune, Denmark. Leading that group, Karen’s understanding of the benefits of ABA-treatment compared to other common treatment methods grew, fueling her desire to work in the field of ABA. In June 2013 Karen began working as an ABA consultant in Copenhagen for a Norwegian ABA consulting service, initially founded by Dr. Lovaas. Karen was responsible for developing ABA-based individual support programs for children with a diagnosis on the autism spectrum. She worked with children of many different levels of ability and challenges, such as the development of verbal behavior, the treatment of anxiety, potty-training, as well as social, motor and cognitive education. In addition to program development, Karen supervised the children’s parents and tutors and monitored and evaluated the progress. She is well versed conducting intelligence testing having training and experience administering the WPPSI and WISC. Furthermore, she studied the latest ABA-literature and took part in different educational conventions concerning ABA including the annual convention of the Association for Behavioral Analysis International in the USA since 2014. Here she has participated in several workshops and tutorials. Among others, in 2014, she participated in Mickey Keenan’s workshops in Denmark concerning the ethical demands for professionals, implementing ABA in home-training, as well as “The Shaping Game” which was about strengthening behavior which is not already in the persons’ repertoire. Additionally, she received a training in the implementation of PECS (Picture Exchange Communication System) organized by the Children’s Center of Copenhagen. At ABA-International Convention in 2014, she saw Robert Schramm, MA, BCBA give his talk on Developing Learner Cooperation with Verbal Behavior through the seven steps to earning instructional control. In 2015 she was able to explore the work of Dr. Douglas Greer and his colleagues. In 2016 she participated on the workshops of Robert Schramm concerning Motivating Learner Participation: An alternative to traditional escape extinction and Lin Du, Susan Buttigieg & Douglas Greer concerning Verbal Behavior Development Protocols from Imitation to Naming. In 2018 Karen participated in the European Association for Behavior Analysis Conference in Würzburg. Stationed in Lübeck, Karen covers the North-East of Germany and works with families in Denmark. Karen is also working on becoming a BCBA.



Julia Siekmann, M.A. Clinical CaseworkJulia Siekmann

coming soon!

Elif Tuncer, B.A. PsychologieJulia Siekmann

Elif, born in Turkey and raised in the United States, graduated with a Bachelor of Arts (B.A.) in Psychology from Montclair State University in Montclair, New Jersey in January 2012. Shortly after her studies, she started working as an ABA instructor at an early intervention center in New York for 14 months with young children with Autism Spectrum Disorder and PDD-NOS ages 1-4. She gained an extensive experience implementing ABA strategies, assisted in developing behavior plans, task analyses, creating social stories, instructional programs collecting and recording data. After 6 months of starting her position, she was promoted to be an ABA staff trainer and started training incoming staff on ABA methodologies and general knowledge on developmental disabilities. She is competent with conducting, scoring and evaluating assessments such as VB-MAPP, ABLLS, Bayley-III, CARS2, PSI and PNM. Alongside her work as an ABA instructor and staff trainer, Elif also worked as a research analyst at a non-profit research organization in New York. She conducted ongoing assessments on children through classroom observations. She used different psychological and statistical data analysis software as well as techniques to create reports, graph results and identify trends in the research. In addition, she analyzed research articles and developed literature reviews. After moving to Europe to expand her professional horizons, she discovered Knospe-ABA GmbH and participated in the workshops presented by Robert Schramm, M.A., BCBA. In fall of 2016, Elif started her intensive training as an ABA/VB consultant with Knospe-ABA, traveling with many consultants, supporting a number of families across Germany. Elif completed her coursework to be a BCaBA from Florida Institute of Technology ABA Online Program and was awarded a certificate of Achievement. She is currently completing the supervision hours to take the BACB examination. Elif is supporting the education of children with autism spectrum and related disorders in middle and southern Germany.


Carolin Bäcker, Sozialarbeiterin/Sozialpädagogin, B.A.Carolin Zottnick

Carolin received her first experiences with a child of Autistic Spectrum Disorder in 2007 when she worked as an “au pair” in the United States of America. In this role, she learned about implementing Applied Behavior Analysis. This experience motivated Carolin’s interest in wanting to work in a therapeutic context with children with disabilities upon her return to Germany. In 2008 she began her apprenticeship as an Occupational Therapist. After passing her exam she worked in a paediatric institution near Frankfurt called Praxis für Ergotherapie Kratz-Heinzig and supported the education of children with various disabilities and behavior concerns. In addition to her main job she also began working as an ABA/VB in-home one-to-one behavior technician for a boy with Autism. In 2012 Carolin began her studies toward a Bachelors degree in Social Work at the University of Applied Science in Darmstadt. Once again she used this period to extend her experience with ABA by also working as a tutor. But this time, she experienced working in a school setting. After three years of study Carolin got her BA in Social Work. She entered her profession in a centre for autism therapy and counselling in 2015, but found the non-ABA based Autism approach used at the time to be less effective than she was hoping to be involved with. In January 2016 she started her training with Knospe-ABA to become an ABA/VB consultant and attended the ABA/VB introductory course presented by Robert in March 2016. Carolin worked with approximately 50 children with Autism and 10 Knospe-ABA consultants during her training. She joined our team as a consultant in the summer of 2016, but is currently in parent time.


Anne Langer, M.Sc. PsychologyAnne Langer

Anne graduated with a Master of Science (M.Sc.) in Psychology from the University of Frankfurt in February 2016. During her studies, she focused on child- and adolescence related mental health topics and was introduced to ABA during a class on Intervention Methods for Children with Autism-Spectrum-Disorder (ASD). She learned about different interventions such as TEACCH and PECS, but it was ABA which was presented as the most efficient and empirically supported methods for treating ASD. Her great interest in autism led her to apply for the position as a student research assistant, where she was responsible for conducting three studies investigating different neurological patterns in young adults with ASD at the Institute of Medical Psychology in Frankfurt, Germany. She additionally wrote her master’s thesis about Multisensory Integration in Autism Spectrum Disorders.
During her two years as a student research assistant in this project, she worked closely with 15 young adults with ASD. Apart from conducting cognitive tests and performing the neuroscientific measurements involved in the study, such as fMRI and EEG/MEG, she ensured that the participants were comfortable at all times during the measurements. Most importantly, it was during her work at this clinic that she realized how naturally working with children on the spectrum came to her, and she observed first-hand the impact that therapy could have on their lives. Anne was determined to find a place to work where she could combine her skills and experience as a psychologist with her passion for working with and helping children with ASD and their families. This dream became reality in May of 2018 when Anne accepted a job to begin working with Knospe-ABA. She started her intensive training as an ABA/VB consultant with Knospe-ABA, traveling with and learning from different consultants working with over 40 different children. To expand her practical experience, she additionally worked with several children supported by Knospe-ABA as a one-to-one ABA tutor. Forever the student, Anne solidified her expertise by intensely working through the ABA/VB literature and training manuals, undergoing several practice and knowledge assessments, as well as attending the ABA/VB introductory workshop presented by Robert Schramm, MA, BCBA. Anne is supporting children with ASS and other diagnoses and their families in middle & south of Germany and Austria. Anne is also working towards becoming a BCBA.

Chan, J., Langer, A., & Kaiser, J. (2016). Temporal integration of multisensory stimuli in autism spectrum disorder: a predictive coding perspective. Journal of Neural Transmission, doi: 10.1007/s00702-016-1587-5
Brodski Guerniero, A. Naumer, M., Moliadze, V., Chan, J., Althen, H., Ferreira-Santos, F., Schlitt, S., Kitzerow, J., Schütz, M., Langer, A., Kaiser, J., Freitag, C. M., Wibral, M. (2018). Predictable information in neural signals during resting state is reduced in Autism Spectrum Disorder. Human Brain Mapping, doi: 10.1002/hbm.24072.


Katja Keane, M.Sc. ABAKatja Keane

Katja graduated from the Irish College for Humanities and Applied Science in Limerick, Irland, as a counsellor/psychotherapist and worked for many years in one of Ireland’s leading mental health charities. In this role, she offers psychological support, developed workshop programs for students, and delivered these workshops in schools. She has also presented a course on "Counseling Skills and Practice" at the National University of Ireland, Galway. Through raising her own child with Autism, and inspired by her love for teaching, Katja became more interested in methods designed to specifically help families who have a child with ASD. This brought her to study ABA at the National University of Ireland, Galway from which she graduated with a MSc in 2016. During her studies, Katja worked at the Red Hill School for children with Autism in Limerick, where she trained with the resident Board Certified Behavior Analyst (BCBA). Her work in the school was mainly focused on the assessment of behavior, the development of behavior support plans, and overseeing their implementation by the teachers. There, Katja was exposed to many different children with a range of abilities and challenges, such as stereotypical behavior, social interaction, and cognitive development deficits. Katja also developed and implemented an 8-week long intervention for two classes in the school, teaching children about awareness of inner sensations, feelings, acceptance and mindfulness. Since finishing her studies Katja has worked as a home tutor in Ireland under BCBA supervision, where she learned about the ABA/VB approach of Robert Schramm. Katja has worked as a one-on-one tutor with two children in their home setting with a focus on verbal behavior. As a native German, Katja returned to Germany beginning of 2018 and joined Knospe-ABA’s team of talented consultants to continue her development in Robert’s ABA/VB approach and supports children with autism and related disorders mainly in the north and east of Germany.


Ioana Corompaki, M.A. Psych.Ioana Corompaki

Ioana finished her bachelor’s degree in psychology in 2008 at the West University of Timisoara, Romania and worked as a kindergarten teacher from 2008 - 2009. In 2009 she began working as a psychologist for a class with 6 strongly affected children with ASD (early learners). Due to the fact that her initial education included speech and language intervention, she also provided SLP services to students in the school. She then had the opportunity to support a 4-year old with autism as an in-home tutor. Due to there being limited knowledge about ABA in Romania at that time, she attended all the courses she could find related to ABA and autism. In 2011 she received a Master’s Degree in Educational Management at the University of Oradea, Romania. That same year she attended the ABAI 34th annual conference in the US where she had the opportunity to learn even more about the latest approaches in autism intervention. In 2012 she started working as an ABA program supervisor in her own private practice as well as with in-home therapy teams. That year Ioana was part of a “group study exchange program” that allowed her to learn directly from teachers, behavior analysts and psychologists working with children with autism in the San Francisco area. In 2013 she started her studies to become a PECS consultant and in 2014 opened Pyramid Learning Center, a center for children with autism and other disabilities. In 4 years, she had approximately 50 families with their children attend her program and many others that were provided guidance and behavioral support. She worked as a coordinator using the Pyramid Approach to Education, implementing verbal behavior programs, PECS, intervention programs, doing assessments using VB - MAPP, ABLLS, Portage Scale, CARS and overseeing the work of the therapists and other collaborators (such as SLPs, OT, Physical Therapy). Also, in 2014 she was finally able to begin her studies at FIT Florida Institute of Technology to become a BCBA (Board Certified Behavior Analyst). It was about this time that Ioana learned about Robert’s work and the 7 Steps to instructional Control and began recommending them to her clients. In 2015 and again in 2017 Ioana gained her own experiences as a mother using her experiences to become an even better teacher, psychologist and Behavior Analyst for her institute in Romania and is now supporting the education of children with autism for English speaking families in Germany, Denmark and throughout Europe.


Jessica Wende, M.Sc. Abnormal and Clinical PsychologyJessica Wende

Jessica graduated with a Master of Science (M.Sc.) in Abnormal and Clinical Psychology from Swansea University in Wales. Applied Behaviour Analysis (ABA) was one of the modules in this course, which introduced her to the basics of ABA. Alongside her studies in 2018, Jessica worked as an ABA tutor for 8 months, where she was able to put theory into practice and start developing her skills in ABA. While working on her undergraduate degree in South Africa, in 2013, Jessica volunteered at Headway, where she assisted therapists in their work with adults with brain injuries. In 2015, Jessica was employed at Eagle Springs Programs in Pennsylvania, USA, to work with mentally and physically disabled adults over the summer. Over this period, she was a “specialist”, organizing creative and fun events for the campers and assisting them in horse riding and other farm activities. Many individuals with Autism attended the camp, which has offered experience working with and for individuals with Autism Spectrum Disorder (ASD).Jessica realized that these individuals had not been supported well in their educations and was therefore, extremely interested in finding a way to help support them better. Once she learned about ABA from her university course and saw the progress that was made with the child she worked with Jessica was hooked. Moving to Germany, Jessica applied to work at Knospe-ABA and attended the workshops that are integral to Robert Schramm´s ABA/VB program. Jessica started the intensive training to become an ABA/VB consultant with Knospe-ABA, traveling with and learning from different consultants and supervisors, working with approximately 50 different children with ASD and other developmental delays during her training. Jessica works throughout Germany to help parents to help their children, by supporting them closely with their child’s ABA/VB program.


Sonja Ziegler, MS, BCBA Sonja Ziegler(Certificant 1-17-28869)

Originally from Stuttgart, Sonja first began her experience in the area of Autism Spectrum Disorder (ASD) in 2003 at Emory University’s Autism Center, in Atlanta, GA, USA. Here she worked both as an assistant therapist and researcher at the Walden Early Childhood Center in the center’s integrated laboratory Preschool led by founder, Dr. Gail McGee. Upon receiving her B.A. in Psychology from Agnes Scott College, Sonja persued her graduate education in Clinical Child Psychology in Hamburg and Saarbrücken, Germany. She received her graduate title of Diplom-Psychologin in 2007 from the University of Saarland. Subsequently, Sonja worked as a consultant psychologist together with children, adolescents, and adults with ASD and developmental disabilities in Sydney, Australia. Her work in all settings has been informed by evidence-based ABA practices. After four years in Sydney, Sonja moved to Santiago, Chile and became one of the only Clinical Psychologists to specifically work with individuals with ASD and their families in Chile. She provided ABA early intervention, and conducted research in the area of ASD. Upon returning to Atlanta in 2013, Sonja joined the Marcus Autism Center, led by Dr. Ami Klin, where she coached early childhood care providers throughout the state of Georgia. She was also an interventionist in Dr. Amy Wetherby’s “Early Social Interaction Project.” In 2014, Sonja returned to Emory University as an interventionist, researcher, and program manager of the 2-3-year-old classroom team, under the mentorship of Dr. Laurie Vismara, BCBA-D, and Dr. Michael Morrier, BCBA-D. While working at Emory University full-time, Sonja completed her BCBA course work at Georgia State University in Atlanta and received her BCBA certification in 2017. With more than 15 years of experience in early intervention and ABA, Sonja has returned to Europe carrying a torch for ABA, and for a total societal integration for individuals living with ASD. She currently resides in Kolding, Denmark and is very excited to begin her collaboration with Knospe-ABA as a supervising BCBA. She is overjoyed by the opportunity to provide evidence-based support to families experiencing ASD in Denmark and throughout Europe.

Sonja has published original work in peer-reviewed journals and has extensive experience presenting at international conferences. Current details of this work are as follows:


Morrier, M. J., & Ziegler, S. M. T. (2018). I Wanna Play Too: Factors Related to Changes in Social Behavior for Children With and Without Autism Spectrum Disorder After Implementation of a Structured Outdoor Play Curriculum. Journal of Autism and Developmental Disorders. Advanced online publication. doi:10.1007/s10803-018-3523-z

Ziegler, S. M. T., & Morrier, M. J. (2018). Increasing Social Interactions of Preschool Children with Autism through Cooperative Outdoor Play. Manuscript submitted for publication.

Fischman, P., Ziegler, S. M. T., Han Suwalski, D., & Fischman, R. (2013). Chile and Autism. In F.R. Volkmar (Ed.). The Encylopedia of Autism Spectrum Disorders. New York: Springer.

Ziegler, S. M. T. (2007). The Perpetual Cycle: The transgenerational effect of reflective functioning. Diplom-Thesis (Master of Science Thesis) in the Faculty of Clinical Psychology of the University of Saarland. Saarbrücken, Germany.


Ziegler, S. M. T., & Morrier, M. J. (2018, May). “I Wanna Play Too”: Increasing Social Interactions of Preschool Children with Autism Spectrum Disorder Through Cooperative Outdoor Play. Poster presented at the annual international conference of the International Society of Autism Research, Rotterdam, The Netherlands.

Ziegler, S. M. T., & Morrier, M. J. (2018, April). Playing, Learning, and Growing Together: A Structured Outdoor Play Curriculum in an Integrated Preschool Setting. Poster presented at the annual conference of the Association of Professional Behavior Analysts, St. Louis, MO.

Ziegler, S. M. T., & Morrier, M. J. (2018, February). The Buddy Game: A Structured Outdoor Play Curriculum in an Integrated Preschool Setting. Poster presented at the annual international autism conference of the Association of Behavior Analysts International, Miami, FL.

Ziegler, S. M. T., & Morrier, M. J. (2017, November). Buddies: A Structured Outdoor Play Curriculum in an Integrated Preschool. Paper presented at the annual conference of the Georgia Association for Positive Behavior Support, Atlanta, GA.

Ziegler, S. M. T., & Morrier, M. J. (2017, September). Increasing Social Interactions of Preschool Children with Autism through Cooperative Outdoor Play. Poster presented at the annual Autism Research Symposium of the Atlanta Autism Consortium, Atlanta, GA.

Ziegler, S. M. T., Fuhrmeister, S., Brooker Lozott E., Payne, C., Ryan, T., & Stapel-Wax, J. (2015, May). Developmental Trajectories Diverted: Empowering Frontline Community Childcare Providers to Support Children’s Social Communication Development through a Coach-the-Coach Model. Poster presented at the annual conference of the International Society for Autism Research, Salt Lake City, UT.

Ziegler, S. M. T. (2015, May). Developmental Trajectories Diverted: Empowering Frontline Community Childcare Providers to Support Children’s Social Communication Development Through a Coach-the-Coach Model. Paper and poster presented at the annual Marcus Autism Center Autism Treatment Symposium, Atlanta, GA.

Fuhrmeister, S., & Ziegler, S. M. T. (2014, December). Fortifying the Front Line: The Marcus Collaborative Coaching Project. Paper presented at the annual conference of the Georgia Association for Positive Behavior Support, Atlanta, GA.


Nadine Schramm (maiden name Knospe)
Nadine Knospe

Nadine came to the world of Autism as a caregiver. Not as a student of ABA, but as a person who wanted to help children with autism live better lives. She found her first job working for Portia Iverson's Son, Dov. Portia and her husband founded the Group "Cure Autism Now" (now "Autism Speaks"), which is one of the largest Autism fundraising and research organizations in America. It was through working with Dov that Nadine was first introduced to ABA. She was trained as a home based therapist where she used different methods of ABA, TEACCH, and PECS. Later, Nadine began supporting the education of Garrett, a boy with autism and fraX- syndrome. Garrett was in the early stages of his Lovaas guided ABA program. Although Dr. Lovaas himself did not work directly with Garrett, it was his LIFE institute that oversaw Garrett's program and trained Nadine. Next to her work as an ABA therapist with Garrett in the home, Nadine worked with him as a one-to-one aid at the kindergarten as well as in his 1st grade elementary chool classroom in Los Angeles. She was trained after the latest Lovaas techniques from 1999-2003 and participated in a PECS workshop, presented by Lori Frost & Andy Bondy. Later in 2003 she added workshop trainings in Verbal Behavior with Dr. James Partington to her already extensive resume. In October 2006 Nadine participated in the workshop # 5 "Teaching Verbal Behavior in a Classroom Setting" of the Dr. Vince Carbone Clinic in New York and in November of the same year, she participated in the international autism congress in Buenos Aires, Argentina. In April of 2007 Nadine added a four day advanced workshop presented by Holly Kibbe, BCBA and Cherish Twigg, BCBA of Establishing Operations Inc. in London, UK and in May she went to the ABA convention in San Diego, USA, and participated in the workshop "How to Train Caregivers in Functional Behavior Assessment and Treatment Development", presented by Julia T. O'Connor of the Krieger Institute and the Johns Hopkins School of Medicine, followed by a participation in the autism congress in Santa Fe, Argentina in October of 2007. Additionally, i
n November of 2008, Nadine participated in a one-day Motor Speech Workshop by Elizabeth Kuegeler, MA, CCC-SLP, PROMPT Certified Instructor. In November 2014 Nadine participated in the workshop "Using Applied Behavior Analysis and Verbal Behavior Strategies to Improve Autism Programming for both Toddlers and Teens with Autism", presented by Mary Barbera, PhD, RN, BCBA-D in Cologne. After 6 years of European wide activity as an ABA/VB Consultant, Nadine now leads the office and consultant team after the birth of her two daughters.