References

Dr. Gabi Liberman has been my statistician for over 28 years. During these years he assisted me with many studies of various natures (correlational and longitudinal studies, interventions, as well as surveys and internet studies). Working with him is always pleasant and enlightening. He does not work solely as a technician but as an involved and caring partner. He is interested in the research questions, learns the data and thinks thoroughly about the best, most up-to-date ways to analyze the date and answer the research questions. He is efficient and always presents the data in an organized, easy to understand manner.

Dr. Liberman is familiar with a wide range of statistical analyses, including multi-level longitudinal analysis. Moreover, he continues to learn all the time to stay on top of changes in the field. Gabi often introduces me to new statistical analyses that suit my data and he does his utmost to explain them and teach them both to me and to my students.

Dr. Liberman is a very warm and honest man. He is always willing to help me by mail or phone if I need extra help. As a researcher, the statistical analyses are very important to me and it’s always a good feeling that such a knowledgeable, trustworthy man is my statistician.

I’m happy to recommend Dr. Gabriel Liberman and Dr. Amir Hefetz’ statistical consultation. Their statistical knowledge is broad, comprehensive, and up-to-date. They suggest ‘simple’ solutions to complex design problems and as such they enabled me and my research team to suggest new insights while taking into consideration the complexity of the data and study design (e.g., managing groups and dyads shared variance, assessing intervention outcomes, managing individual differences within intervention outcome, looking at developmental growth). Using their consultation helped us to increase the quality of study results and offer innovative findings leading to a rigorous conclusion. All of their suggested statistical analyses were accepted to publications in high-prestige journals, and even-if reviewers at time speculated the analyses-they could help us to cope efficiently and successfully with all the critique remarks that we obtained.  They also provide solutions within a very reasonable timeline; they are responsible and nice to work with.  I highly recommend getting their help and have full confidence that it will be an enriching and very beneficial process.

In the past ten years, I successfully used the services of Gabi and Amir to conduct statistical analyses. In each case, I used a different and complicated dataset. In all instances, they provided quality analyses using up to date techniques, and the related papers were accepted for publication.

I am pleased to recommend Dr. Gabi Liberman to whoever is seeking a reliable and insightful statistical consultant. Gabi has been working with me for many years on several projects, among which are:  post-trauma following the Lebanon war, family violence, adjustment of Israeli young adolescents following the second Lebanon war, dyadic dynamics in coping with cardiac illness, and acute stress disorder.

He always keeps himself updated to provide the most relevant and advanced analytical tool that allow us to understand the phenomenon we study in creative and innovative ways, and to obtain stronger and more meaningful conclusions. Gabi is also a thorough researcher that studies the data from all aspects and tries different approaches for analyzing it. He always makes sure that the chosen approach will be the best available and he will check his work many times before presenting the final report. The pleasant manner in which he has been helping graduate students at the School in a most efficient and systematic manner has helped to reduce anxiety among them. I also appreciate Gabi’s enthusiasm to learn more, to read more in the most up to date literature, and to experiment with new models in order to bring more meaning to the data collected.

As suggested above, I warmly recommend Gabi to academic scholars who are looking for a professional statistical consultant. Gabi has always been an essential member of the research team and feels full responsibility for the project. His contributions are priceless. I’ll be happy to provide more details to whoever this recommendation is of interest.

I am pleased to write this letter of recommendation for Gabi and Amir, who have been our trusted partner in statistical analysis and data interpretation since 2022. During our collaboration, Gabi and Amir have consistently demonstrated a high level of professionalism, accuracy, and innovative problem-solving skills that have significantly contributed to the success of our projects.

Gabi and Amir excel in providing detailed and precise statistical services, ensuring that all data is analyzed with the utmost accuracy. Their team’s ability to handle complex data sets and deliver comprehensible results has enabled us to make informed decisions based on reliable and actionable insights. Their expertise spans a range of statistical methods and tools, making them a versatile provider capable of adapting to various needs and industries.

I confidently recommend Gabi and Amir to any organization seeking a dependable and expert statistics provider. Their dedication to delivering high-quality services and their proactive approach to tackling challenges are assets that will benefit any data-driven project.

I Have the pleasure to work with Gabi and Amir for a number of years, they really accompany you in your quest, and they do it very professionally. Furthermore, work with them is always easy and they are always there later for the details, the small changes requested by reviewers or journals even months after the analyses.

I have used the statistical guidance and assistance of Dr. Gabi Liberman and his team for about two decades. Along with their high professional level and in-depth theoretical understanding, I have benefited from their high-quality service and pleasant personal interactions. In every study, the team demonstrated advanced skills and abilities in data management and analysis, accessibility, and adequate response to every possible request.

I have been working with Dr. Gabi Liberman for nearly two decades. During this time, Gabi has provided statistical advice and performed data analysis for my research in various fields.

Dr. Liberman is a highly skilled and professional statistician. He is up-to-date and creative.

Dr. Liberman is deeply involved in the research for which he conducts statistical analyses. He is very accessible. On a personal level, working with him is pleasant and enlightening.

Indeed, Gabi is the best statistician I have ever worked with.

I wholeheartedly recommend him.

Beyond their exceptional expertise, Dr. Liberman and Amir Hefetz are a pleasure to collaborate with. Their friendly demeanor and approachable nature make working with them a seamless and enjoyable experience. They possess a rare combination of technical prowess and interpersonal skills, creating a dynamic and productive environment for any research endeavor.

I enthusiastically recommend Dr. Gabi Liberman and Amir to anyone seeking top-tier statistical services. Their dedication to excellence and personable approach make them invaluable partners in any research endeavor!

It is my great pleasure to have the opportunity to write a recommendation for Dr. Gabi Liberman. I have known Dr. Liberman for many years, during which we have worked on numerous different research projects and witnessed him as a very professional and capable statistician.

Working together with Dr. Liberman is a very rewarding experience. He is exceptionally bright, knowledgeable, very skillful and experienced in various methods of statistical analyses. His great intellectual and statistical abilities as well as curiosity, seriousness, dedication and motivation were a great asset to the projects that we have worked on.

Dr. Liberman is a very creative, responsible and devoted statistician. His knowledge, skills, and experience as well as his ability to explore new subjects of interest, are extremely significant during the data analysis process. He is very sincere and always willing to listen and study more.

Dr. Liberman served as the statistical advisor for many of my students on their MA and Ph.D thesis. His success in advising the students has a lot to do with his sincere approach, responsibility, endless patience and interpersonal communicative skills.  He likes to be challenged with new questions and find the solutions.

Having known Dr. Liberman as a capable, intelligent and sincere statistician I am sure that he can contribute significantly to research in various scientific fields.

I am taking this opportunity to warmly recommend my colleague and friend Dr. Gabi Liberman, an excellent statistician with whom I have been working on my developmental psycholinguistic research in the last three decades, starting from 1994. Dr. Liberman has been advising me on all of my empirical studies – my own work, joint work with colleagues, and the research endeavors of my MA and doctoral students. He always finds the best solutions for analysis, he has an open mind and is attentive to questions and problems, always willing to explain every step of the statistical protocol. Gabi’s continued excellent quality of work, insightful and knowledgeable solutions, precision and reliability in carrying out analyses, together with superb organization skills and positive collaborative spirit have led us to use his services exclusively in literally dozens of research works.

Over the years, Gabi has advised me on studies in a range of psycholinguistic domains on Hebrew, Arabic, and English as a second language: experimental structured elicitations of children’s developing language skills such as diminutive forms in Hebrew or noun plurals in Arabic; analyses of the distribution of linguistic forms and functions in children’s peer talk and text production (e.g., binyan verb patterns in narratives); studies tracing the development of text production in children, adolescents and adults, such as story re-telling in Arabic or the relationship between prosody and reading comprehension in Hebrew; and research on the acquisition of literacy skills such as my extensive psycholinguistic analysis of spelling patterns in Hebrew. These studies often required complex and multi-dimensional analyses which were more than adequately met by Gabi’s expert statistical support. Every paper that I have published using quantitative analyses has consequently used Gabi’s statistical infrastructure, and they have always withstood the rigorous and demanding requirements of journals’ peer review processes. I can say with certainty that he is the best-trained and most experienced statistical advisor on psycholinguistic issues in Israel.

It is thus my pleasure to recommend Dr. Gabi Liberman’s expert services. I know that many of my colleagues, like me, rely on his expertise.

Gabi and Amir are exceptional statistics consultants who excel in utilizing advanced research methods. Their ability to address unexpected challenges during studies and provide innovative statistical solutions is remarkable. Over the years, they have been invaluable collaborators in my research, publications, and conference presentations within psychology and social work. Gabi and Amir consistently demonstrate professionalism, creativity, and systematic thinking, contributing significantly to the advancement of my projects. Always with big smile. Their unwavering availability and dedication underscore their commitment to excellence in statistical consultancy. For anyone seeking not just statistical expertise but a true partnership in research, Gabi and Amir represent the epitome of excellence. I highly recommend Gabi and Amir for their expertise and collaborative approach, which greatly enhances research outcomes in our field.

Gaby and Amir are exceptional at what they do: they have a solid, seemingly infinite knowledge of statistics and are able to understand different types of research as if they were another member of the team. Working with them allows you to make the most of your hardly-collected data; my research output has improved its quality considerably since working with them. Cannot recommend enough!

I have had the pleasure of working closely with Gabi and Amir on multiple projects. Their exceptional skills in statistical analysis, particularly in data gathered through experience sampling methods and advanced techniques like mixed effects models, have been absolutely invaluable to my research. I wholeheartedly recommend Gabi and Amir to anyone seeking top-notch statisticians, as their expertise, professionalism, and collaborative spirit have greatly contributed to the success of my projects.

Over the past two decades, both I and several members of our research team have consistently relied on your invaluable expertise and guidance in navigating the statistical intricacies of our projects. Your contributions have been integral to the success and advancement of our research endeavors.
Three key characteristics of your work have consistently impressed us: – Your ability to swiftly grasp the essence of our research inquiries and provide clear, concise recommendations for the most suitable statistical strategies. Your insights have significantly enhanced the quality and rigor of our analyses.
– Your commitment to staying abreast of the latest developments in statistical methodologies has ensured that our analyses are not only rigorous but also reflective of current best practices in the field.
– A remarkable ability to deliver high-quality results within agreed-upon timelines. Your reliability in meeting deadlines has been instrumental in maintaining the momentum of our research initiatives.
I have full confidence that anyone who engages your services will benefit from your knowledge and professionality.

I have been working with Data-Graph for more than 15 years. Dr. Gabi Liberman and Amir epitomize excellence in statistical services. Their proficiency is unmatched, and they leverage the most advanced methods to deliver impeccable results. Their commitment to providing the best possible services ensures that each project receives the utmost attention to detail and accuracy.

I highly recommend Gabi & Amir. They are experts in statistics and methodology, both very accessible, and friendly. They take time and effort to explain even complicated analyses in a simple straight -forward way such that everyone can get an excellent understanding of the findings. I very much enjoyed working with them.

I am delighted to wholeheartedly recommend Dr. Liberman and Data-Graph company. Over the past three decades, I have had the privilege of collaborating closely with Dr. Liberman, and I have consistently been amazed by his systematic approach, unwavering dedication, exceptional interpersonal skills, and relentless pursuit of knowledge and skill advancement in the field of statistics. Together with my students, we have authored dozens of publications in the most prestigious scientific journals, a testament to Dr. Liberman’s expertise and the outstanding quality of work produced by Data-Graph company.

I am happy to recommend Dr. Lieberman and Dr. Hefetz for anyone seeking statistical expertise in their research endeavors. Their proficiency spans both methodological and statistical domains, rendering them invaluable allies on any research journey. They possess a deep mastery of advanced statistical techniques and make significant contributions to the publication of research papers in prestigious scientific journals. What sets them apart is their attentiveness not only to the specific requests and needs arising from the research but also their ability to analyze data from fresh, unique perspectives. Collaborating with them is a truly enriching experience – not only professionally rewarding but also a continuous voyage of learning and intellectual growth. Their pleasant demeanor and genuine passion for their craft create an environment conducive to exploring complex ideas and pushing the boundaries of knowledge.

ד”ר ליברמן וד”ר חפץ מלווים אותנו כיועצים סטטיסטיים כבר מעל עשור. הם עבדו איתנו על מגוון מחקרים לאורך השנים, תמיד בסבלנות ובנועם. מעבר למקצועיות הרבה, לידע הנרחב ולפתרונות המגוונים שהם מציעים באופן מותאם לכל מחקר, הם תמיד מעלים שאלות מחקר נוספות שכדאי לבדוק, וממליצים על מבחנים סטטיסטיים נוספים שמעשירים את המחקר שלנו ומספקים זוית נוספת של ניתוח הנתונים. העבודה מולם יעילה, נעימה ומקצועית, ואני ממליצה עליהם בחום.