Psychology & Mental Health Education
The Behaviour Institute offers accredited online psychology diploma courses designed for personal growth and professional development. Based in Dublin, Ireland, and founded by Dr. John Crimmins PhD — a psychotherapist with over 25 years of experience — our programmes combine evidence-based approaches with internationally recognised qualifications.
Professional Education
Internationally accredited online courses in Psychology & Mental Health ensuring excellence in professional development
Personal Development
Build a stronger foundation for your life. Our courses help you explore your values, motivations, and goals, leading to greater self-awareness.
Insight into Behaviour
By studying with us, you' will embark on a journey of self-discovery. Learn to identify your blind spots and develop an understanding of your behaviours
Develop new skills
Make a difference in peoples lives by learning micro CBT skills as well as developing empathy and unconditional regard.
Professional Accredited Psychology training
14 Diploma courses in various mental health disciplines
Diploma in Cognitive Behavioural Therapy
Develop the essential skills of CBT in this Professional Diploma. Throughout this rigorous online training program, participants will develop a toolkit of techniques and strategies to workwith people on a professional and ethical level.
Diploma in Positive Psychology
Positive psychology considers subjects such as character strengths, optimism, life satisfaction, happiness, wellbeing, gratitude, self-compassion, self-esteem and self-confidence, hope, and elevation as a field of study.
Diploma in Sports Psychology
This course is a scientific study of the psychological factors associated with participation and performance in sport activities. Emphasis will be placed on how psychological principles, enhance sport performance.
Diploma in Counselling, Psychotherapy
This course provides insight into the distinctions among counseling, psychotherapy, and psychoanalysis. It equips learners with the essential skills, qualities, and attitudes needed to excel as professional counselors.
Diploma in Emotional Intelligence
This course will give you the skills needed to develop your emotional intelligence so you can recognise negative emotions (such as anxiety, fear & frustration) while they’re happening, identify triggers and deal effectively with the emotion.
Addiction Psychology
You will learn how to improve those core skills that are required to help those affected by drug/alcohol use. You will develop your expertise in dealing with the behaviour of addicted people.
Welcome to The Behaviour Institute
I’m Dr. John Crimmins. With over 25 years of clinical experience specializing in Addiction, Eating Disorders, and Workplace Trauma, I founded this institute to make evidence-based psychological training accessible worldwide.
Unlike larger impersonal platforms, I believe in a mentored approach to learning. I personally tutor every participant on our courses, providing direct feedback and professional guidance as you progress. This ensures you aren’t just reading theory—you are gaining clinical insights from a PhD-level practitioner dedicated to your success.”
What Our Students Say
I signed up for a five Diploma package including Cognitive Behavioural Therapy and have extracted fantastic tools from every course. The multiple modes of delivery — video, literature, research and case studies — make for a fantastic learning environment. The continuous support and friendly demeanour of Dr. John Crimmins is invaluable. His detailed feedback on assignments clearly displays his passion for Psychology and continuous development.
I want to express my utmost thanks to Dr John Crimmins for all the support and encouragement throughout my studies. The CBT content is extremely valuable — rich at an academic level but also deeply practical for everyday life. As well, they went above and beyond by providing extra reading links for those who are interested for more in depth research on particular data. My experience with the Institute was and still is positive and exciting.
The course material was really interesting, easily accessible and the website was user friendly. The support through email made it an amazing learning journey. This course has opened a new path in my professional career and will benefit our community here in the UAE. Special thanks to Dr Crimmins for his guidance and valuable support. I do recommend people to explore the options thru the website and register.
Celebrating Success: Recognising Our Newly Qualified CBT Practitioners
Time limited offer
Get 3 of our courses for the price of one!
✔️ Receive training in all the major schools of psychology.
✔️ You can do the courses one at a time! You can even gift one to a colleague.
✔️ A Diploma Certificate is awarded for each course successfully completed.
✔️ There is no time limit for completion – take your time and enjoy the learning.
Frequently asked questions
Yes. The Behaviour Institute is accredited by the CPD Certification Service in London, UK. A diploma certificate is awarded on successful completion of each course.
All courses are designed and written by Dr. John Crimmins, a PhD-level psychotherapist with over 25 years of clinical experience based in Dublin, Ireland. The courses are fully self-paced, meaning you study in your own time, revisit material as often as you like, and progress at a speed that suits your life and schedule.
Most students complete their diploma within 3 to 6 months, however we are very flexible. Extensions are available if needed and there is no pressure to finish by a set date. You can study entirely at your own pace from anywhere in the world.
Yes. All courses are delivered fully online and are open to students worldwide. We have students in Ireland, the UK, UAE, Canada, Australia and beyond.
No prior psychology qualification is required. Our courses are designed for both beginners and professionals looking to develop new skills.
Yes. We currently offer 3 diploma courses for the price of one. There is no time limit on completion and a certificate is awarded for each course successfully completed.
