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   An Affiliated Training Center of Albert Ellis Institute   



Καταγραφή 2


Chrysoula Kostogiannis (Ph.D., RECBT, Ellis Scholar)

Director and Supervisor of the Hellenic Institute for RECBT


Dr. Chrysoula Kostogiannis, studied Psychology in the United States of America, and holds degrees in Psychology (Bachelor of Science, 1986) from Baylor University in Texas, postgraduate degree in Psychology (Master of Arts, 1991) and doctoral degree Psychology (Doctorate of Philosophy, 1994) from Hofstra University in New York, in Clinical and School Psychology. She completed her post doctoral clinical training at the Albert Ellis Institute in New York, where she participated in Post-Doctorate Fellowship Training in Rational Emotive & Cognitive Behavioral Psychotherapy, in 2000. In 2003, she founded, and since then directs, the Hellenic Institute for Rational Emotive & Cognitive Behavior Therapy in Athens, Greece, which is an Albert Ellis Affiliated Training Center. Dr. Kostogiannis supervises mental health professionals, especially psychologists and psychiatrists, as part of their training in Rational Emotive & Cognitive Behavioral Therapy, in Athens at other international affiliated centers.

From 1995 until 2012, she served as Professor of Psychology and Assistant Head of the Department at the American College of Greece (Deree College), where she taught courses of applied psychology, including, Child and Adolescent Psychopathology, Adults Psychopathology, Counseling Psychology and Schools of Psychotherapy, Psychometrics, Assessment of Intelligence and Personality, Theories of Personality, Diversity and Stress Management. During the period 2012-2013, she was appointed Director of Psychology programs at the Hellenic American University/Hellenic American College, where she operated the master’s degree program in Clinical Psychology, while during the period 2013 - 2014, she was appointed Chair of Psychology of the Hellenic American University/Hellenic American College in Athens, Greece. In addition, in 2013, she established the Hellenic American University/ Hellenic American College University Center and served as its Director until 2014. Dr. Kostogiannis, presents a rich research background, where she investigates the effectiveness of Rational-Emotive & Cognitive Behavioral Therapy, with diverse issues, including cultural underpinnings of psychopathology, anger, depression, eating disorders and obesity, relationship issues and others. Within the context of Clinical Psychology, she is an expert in Rational Emotive & Cognitive Behavioral Therapy, Counseling and Coaching with individuals, groups, and couples, addressing psychological issues and promoting psychological wellbeing. In addition, Dr. Kostogiannis works in private practice with individuals, groups and couples with various socio-emotional and behavioral issues. She has collaborated as an external associate psychologist, with business executives in various organizations, for the promotion of professional satisfaction and prosperity of human resources.

Furthermore, she specializes in psycho-educational assessment of school difficulties, including learning difficulties and ADHD, and behavioral and emotional difficulties, and provides services of career discovery and guidance with adolescents and adults. Within the context of School Psychology, she also holds extensive experience as an external counselor and consultant at many schools for the last 20 years, with presentations and workshops for parents and educators, on topics ranging from parental awareness of childhood and adolescence issues to specific trainings for parents and educators (e.g., coaching, anger management, communication skills, and other tailor made topics). Dr. Kostogiannis, was certified as School Psychologist from New York’s State in 1990, while she is a regular member of the Association of Greek Psychologists (SEPS) and past member (1998) and current international affiliate member of American Psychological Association (APA).

Since 1994, she been in professional practice in the area of Maroussi, with a professional license provided by the Greek state. She is married with two children and she lives in Athens.


Anna-Maria Plessa (DPsych, RECBT)
Counseling Psychologist & RECBT Practitioner
Coordinator of Counseling Services

Dr. Anna-Maria Plessa works as a psychologist and a psychotherapist.

Her academic training and clinical experience began over a decade ago and span the fields of psychological neuroscience, clinical psychology, counseling psychology, and psychotherapy.

She holds a Bachelor of Science degree in Psychology with Neuroscience (University of Westminster, UK, 2009), a Master of Arts degree in Clinical Psychology (La Salle University, Philadelphia, USA, 2011), a Master of Science degree in Counselling Psychology (City, University of London, UK, 2014), and a Professional Doctorate (DPsych) in Counselling Psychology (City, University of London, UK, 2020). Her doctoral thesis portfolio focused predominantly upon the areas of counseling psychology and mental health in the field of substance misuse, while her doctoral research utilised grounded theory methodology in order to investigate and delineate the constituent parts of the therapeutic process of change from the perspective of substance misusers who found psychotherapy helpful in assisting their recovery. 

Dr. Plessa is further qualified and fully accredited to work as a Rational-Emotive and Cognitive-Behavioral Therapist, and is a fellow of The Hellenic Institute for Rational-Emotive & Cognitive-Behavior Therapy (R. E. C. B. T., Affiliated Center of the Albert Ellis Institute, New York, USA) in Athens, Greece, since 2013.

Dr. Plessa has several years of experience working with diverse client groups in the NHS (National Health Service, UK), international cognitive rehabilitation day care centers, private hospitals, community-based drug and alcohol services, school counseling services and outpatient psychotherapy institutes. Clients seen over this period have included children, adolescents, adults, and older adults facing a range of emotional, behavioral, learning, neurological, and personality-related challenges (e.g., depression, anxiety, social anxiety, panic attacks, obsessive-compulsive symptoms, post-traumatic stress and growth challenges, sexual abuse, eating and body image concerns, psychosis, substance misuse, deliberate self-harm, loss and bereavement, relationship difficulties, infertility problems, work-related stress, Attention-deficit/hyperactivity disorder, Asperger’s syndrome, dyslexia, dementia, Multiple Sclerosis). Her working style is warm and collaborative, and integrates evidence-based humanistic-existential principles with cognitive-behavioral approaches and attachment-informed theories of personality development and change, in a way that aims to meet each individual client’s needs and the stage of the therapeutic process. She is able to work with her clients in English and Greek.

Dr. Plessa is registered as a Practitioner Psychologist with the Health and Care Professions Council (HCPC Registration No: PYL039710) in the UK, as well as a Chartered Counselling Psychologist with the British Psychological Society (BPS / CPsychol No: 239867). Furthermore, she is an Associate Member of the American Psychological Association (APA Membership No: 29637509), as well as qualified and registered with the British Psychological Society (BPS) in the UK as an Accredited Test User in the areas of Occupational Ability and Personality Assessment  (RQTU Membership No: 239867).

She stays active and up-to-date in her field of expertise by engaging in continuing professional development practices through regular attendance and involvement in relevant psychoeducational conferences, seminars, and workshops. Her research interests lie in the use of qualitative methods (predominantly grounded theory and hermeneutic-phenomenological approaches) to study a range of applied counseling psychology and psychotherapy topics, such as existential- and attachment-informed understandings of mental distress, post-traumatic growth factors, the effectiveness of animal-assisted therapy, and the current role of social media in people’s intrapersonal and interpersonal functioning.  

Type of Counseling and Psychotherapy

Dr. Plessa provides both:

  • Short-term therapy (from 6 to 24 sessions)
  • Long-term therapy (from 1 to 3 years)

Client Profile

Dr. Plessa sees a variety of clients, including: 

  • Adult individuals
  • Adolescents
  • Couples
  • Families and other groups (e.g., groups of individual clients formed around a shared topic or area of concern)

Areas of Specialization

  • Individual Counseling and Psychotherapy
  • Group Counseling and Psychotherapy
  • Substance Misuse Counseling and Psychotherapy
  • Psychometric Assessment and Evaluation
  • Multi-generational Genogram Construction and Interpretation of Family Dynamics
  • Attachment-Informed Psychotherapeutic Practice
  • Comprehensive Rational-Emotive & Cognitive-Behavioral Assessment and Therapeutic Intervention

Specific Topics:

Dr. Plessa works with a range of psychotherapeutic concerns, including:

  • Emotional difficulties (e.g., anxiety, depression, shame, guilt, hurt, anger, jealousy, envy)
  • Relationship difficulties (e.g., intimacy issues, communicational conflicts)
  • Existential challenges and life stage difficulties
  • Bereavement
  • Sexual abuse and trauma histories (e.g., psychological abuse, domestic violence)
  • Post-traumatic stress disorder
  • Eating disorders and body image problems
  • Substance misuse/dependence
  • Psychosis
  • Obsessive-compulsive symptoms
  • Panic attacks
  • Social anxiety
  • Perfectionism
  • Procrastination/Motivation difficulties
  • Academic Underachievement
  • Work-related stress
  • Communication and Assertiveness skills training
  • Conflict Resolution skills
  • Self-limiting beliefs and feelings of inadequacy
  • Self-acceptance issues and loss of self-confidence
  • Personal Development

Dr. Plessa offers individual, group, family and couple sessions in face-to-face, Skype and Zoom formats.

To arrange an appointment with Dr. Plessa, you can call her at +30 69444 38843, e-mail her at amplessa@gmail.com or contact her at:

Hellenic Insitute for Rational-Emotive & Cognitive-Behavior Therapy

Aristeidou 3, 151 22, Maroussi, Athens, Attica

Tel.: +30 210 6128950

E-mail: info@recbt.gr

Seminars for Professionals

Seminars for the Public