Archives: Authors

Gerald Koocher, PhD is Professor and Dean of the School for Health Studies at Simmons College. He has served as President of the American Psychological Association, Chief of Psychology at Boston's Children's Hospital, and Associate Professor at Harvard Medical School. He has published more than 150 articles, book chapters and books, and is a frequent lecturer across the United States and abroad on topics of child adaptation to chronic and life-threatening illness, and coping with bereavement and loss.

Geraldine K. Piorkowski, Ph.D., is a retired clinical psychologist who received her doctorate from the University of Illinois, Urbana-Champaign. Since then, she has worked in a variety of academic and clinical settings for over fifty years. Besides holding the position of Chair of the Psychology Department at Roosevelt University, Chicago, she was also on the faculty at the University of Illinois at Chicago, the College of Medicine and Dentistry of New Jersey at Newark and the Northwestern Medical School in Chicago. In addition, she was director of two university counseling centers in Chicago. She is the author of many psychological articles and three books: Too Close for Comfort: Exploring the Risks of Intimacy (1994), Adult Children of Divorce: Confused Love Seekers (2008), and most recently, Beyond Pipe Dreams and Platitudes: Insights on Love, Luck, and Narcissism from a Longtime Psychologist (2021). She lives in Chicago with her husband of 61 years. They have two adult children (Paul & Julie) and also had a son, Michael, who died in 1995.

Greg Arnold, PsyD, LMHC, Account Manager, resides in Bellingham, WA, so he’s basically Canadian. He holds a PsyD in Clinical Psychology and puts the wisdom he's gained from hours of watching Psychotherapy.net videos to use providing couples, individuals, and families, with person-centered, humanistic psychotherapy in Bellingham. As Account Manager at Psychotherapy.net, Greg helps universities and community mental health organizations integrate the inspiring work of our expert therapists-on-video into the training and professional development of students and career professionals alike.

Dr. Levenson has been specializing in the area of brief therapy—as a clinician, teacher, and researcher—for over 25 years. She directs the Brief Psychotherapy Program at California Pacific Medical Center, and is a professor at the Wright Institute. She has published over 70 articles and two books, Time-Limited Dynamic Therapy: A Guide to Clinical Practice, and The Concise Guide to Brief Dynamic Psychotherapy. Levenson also made a video on Time Limited Dynamic Therapy website. To learn more about her work, visit Hanna Levenson's website.

Hans Eysenck was professor of psychology at the Institute of Psychiatry, King's College, London from 1955 to 1983. He was a major contributor to modern scientific personality theory, having created and developed a distinctive dimensional model of personality. Born in Germany, Eysenck immigrated to the UK when he was 18 because of his opposition to the Nazi party. When he was informed that his prerequisite courses for entry into a physics or chemistry program in the UK would not transfer from Germany, a frustrated Eysenck decided to instead pursue psychology.

A notably divisive figure in scientific psychology, Eysenck made waves in the field over several decades. A paper he wrote in 1952 on the effects of psychotherapy ignited his first major controversy. In it, he stated that two-thirds of therapy patients improved significantly or recovered within two years, regardless of whether or not they received psychotherapy. But perhaps the most influential controversy of Eysenck’s career was the argument made in his book, Race, Intelligence and Education, that racial differences in intelligence could be partially attributed to genetic factors. Although he was a controversial figure, Eysenck’s expansive research had a major influence on psychology. Beyond his work in personality and intelligence, Eysenck was a key figure in the establishment of empirically researched approaches to psychotherapy.

Ernest L. Rossi, PhD is an internationally renowned therapist, teacher and pioneer in the psychobiology of mind-body healing. He is the Science Editor of Psychological Perspectives and the author, co-author and editor of more than 20 professional books in the areas of psychotherapy, dreams, psychobiology and therapeutic hypnosis, including Dreams, Consciousness, Spirit, Mind-Body Therapy: Methods of Ideodynamic Healing in Hypnosis, and the bestselling The Twenty-Minute Break: Using the New Science of Ultradian Rhythms.

Erving Polster, PhD (1922-2024) was the Director of The Gestalt Institute of San Diego, and the author of several important books, including Gestalt Therapy Integrated, Every Person's Life is Worth a Novel, and From the Radical Center: The Heart of Gestalt Therapy, as well as dozens of articles and chapters.

See all Erving Polster videos.