Picture thousands of researchers, clinicians, and students landing in the same city — all carrying different ideas, different data, and different languages — but united by a single discipline. That is exactly what happens every four years when the international congress of psychology opens its doors.
This is not just another academic conference. It is the single most important gathering in the world of psychology. It is where breakthroughs are shared before they reach journals, where collaborations are born across continents, and where the direction of an entire field gets quietly redirected. If you want to understand where psychology is heading — and why — this is the event to watch.
Whether you are a practising psychologist, a student just starting out, or simply someone curious about how the science of the human mind is evolving globally, this guide will tell you everything you need to know.
A Brief History: How the International Congress of Psychology Began
Psychology as a formal science is relatively young. Wilhelm Wundt established the first experimental psychology laboratory in Leipzig in 1879, and within just a decade, the discipline was already thinking globally.
The very first international congress of psychology was held in Paris in 1889. At the time, it was a modest gathering of European academics who believed that psychology needed a shared international stage. What they could not have known is that they were planting the seed for one of the world’s most enduring intellectual traditions.
The congress has been held — with some interruptions caused by world wars and the COVID-19 pandemic — ever since. Today, it is organized under the auspices of the International Union of Psychological Science, known as IUPsyS. Each congress is hosted by a national society and follows a rigorous selection process. It takes place every four years, which gives each edition a weight and significance that annual conferences rarely achieve.
Over the decades, the congress evolved from a European-dominated event into a truly global one. Researchers from Asia, Africa, Latin America, and Oceania now participate in significant numbers. The shift reflects something important: psychology is no longer the property of any one culture or tradition. It belongs to everyone.
The 2020 congress, originally planned for Prague, was disrupted by the COVID-19 pandemic. Rather than cancel, the organizing committee adapted and moved the event to a fully virtual format — a remarkable feat that still drew nearly 4,000 active participants. That resilience said something about the community’s commitment to staying connected, even under the most difficult circumstances.
The 33rd International Congress of Psychology 2024: What Happened in Prague
Prague finally got its moment in 2024. The 33rd international congress of psychology took place in the Czech Republic from July 21 to 26, and by every measure, it delivered.
The event was organized by the Czech-Moravian Psychological Society, in collaboration with the European Federation of Psychologists’ Associations (EFPA) and under the auspices of IUPsyS. The theme chosen for ICP 2024 was “Psychology for the Future: Together in Hope” — a phrase that carried real weight after years of pandemic isolation, global conflict, and social upheaval.
The Scale of ICP 2024
The numbers alone tell a compelling story. Nearly 3,973 participants attended in person. There were approximately 2,000 oral presentations, 1,108 poster exhibits, 105 symposia (of which 53 were invited), 27 panel discussions, and 9 workshops. Attendees heard 94 keynote addresses and 11 state-of-the-art lectures. At its peak, 22 parallel sessions ran simultaneously. Participants came from 95 countries spanning all five continents.
This was not a niche gathering of specialists. It was a cross-section of the entire global psychology community.
Key Themes and Sessions
The congress covered an enormous breadth of topics. Mental health in conflict zones, particularly the psychological impact of the war in Ukraine, drew significant attention. Panellists explored the role of empathy, negotiation, and conflict resolution in reducing violence — a deeply practical discussion grounded in real-world crisis.
The psychology of ageing featured prominently, with a dedicated section on the Main Stage that drew in researchers and clinicians who would not normally have prioritised the topic. The format worked: by placing it in the central venue, the organizers created unexpected conversations between specialists and curious newcomers.
A panel discussion titled “Reflexivity Needed: How Shall We All Live Together in a Community?” addressed questions of belonging, migration, and cultural coexistence — issues that are pressing for psychologists worldwide, not only in Europe.
EFPA presented the EuroPsy standard, reinforcing the importance of continuous and specialised education for psychologists across European member states. Representatives from IUPsyS and the International Association of Applied Psychology also participated extensively, covering topics aligned with the UN Sustainable Development Goals and the role of psychology in global health policy.
The Opening Ceremony featured a laser light dance show, and the IUPsyS Quadrennial Awards were presented, with Linda T. Smith receiving the Archbishop Desmond Tutu Achievement Against the Odds Award.
The “Deep Dive” Innovation
One of the most talked-about aspects of ICP 2024 was a new format: improvised “deep dive” sessions held after keynote talks. Speakers stayed on to continue the conversation with smaller groups of engaged attendees. These informal extensions proved far more popular than anyone anticipated. They created the kind of real intellectual exchange that formal programming can rarely replicate.
What Is the International Congress of Applied Psychology?
Running parallel to the main ICP is a separate but equally prestigious event: the international congress of applied psychology, organised by the International Association of Applied Psychology, known as IAAP.
IAAP holds the distinction of being the oldest international association of psychologists in the world. It was founded in 1919 — technically a year before its official 1920 establishment — by Swiss psychologist Édouard Claparède, originally under the name the International Association of Psychotechnics. The name was changed to its current form in 1955. Today, IAAP has more than 1,500 members from over 80 countries.
The mission of the international congress of applied psychology is clearly stated: to promote the science and practice of applied psychology and to facilitate interaction among applied psychologists around the world. Where the main ICP casts a wide net across all of psychology, ICAP focuses on psychology as it functions in real, practical settings.
What “Applied” Actually Means Here
Applied psychology covers a broad territory. It includes occupational psychology — how people perform, lead, and collaborate at work. It includes health psychology — the mental dimensions of physical illness, recovery, and prevention. It covers educational psychology, forensic psychology, sport psychology, and environmental psychology, among many others.
The international congress of applied psychology brings these domains together under one roof, giving practitioners direct access to the latest research while giving researchers direct feedback from the field. That two-way exchange is what makes it uniquely valuable.
From Beijing to Florence: ICAP’s Recent History
The 30th International Congress of Applied Psychology was held in Beijing, China, in July 2023, under the theme “Applied Psychology for a Better World.” It was the first ICAP since IAAP’s Centennial celebrations were disrupted by COVID-19. The Beijing congress bridged psychological traditions of East and West and drew practitioners and researchers from across the globe.
Looking ahead, ICAP 2026 will be held in Florence, Italy, at the historic Fortezza da Basso venue — a 16th-century fortification now used as one of Italy’s premier exhibition spaces. The Opening Ceremony will take place at the Teatro del Maggio Musicale Fiorentino on July 21. Florence will mark another chapter in ICAP’s century-long story of bringing applied psychology to the world stage.
The International Congress of Clinical Psychology: Where Science Meets Practice
Clinical psychology has its own dedicated congress — a space where the most rigorous research in assessment, diagnosis, and therapeutic intervention is shared and debated.
The international congress of clinical psychology exists because clinical psychology has unique demands. Unlike broader psychology events, clinical congresses focus specifically on what happens between a therapist and a client, what treatment protocols work, what does not, and what the evidence actually says. The sessions are designed to be directly usable by practitioners.
Recent congresses have explored topics such as the role of early trauma in both mental and physical health outcomes, and the implications for clinical practice at both primary and secondary prevention stages. Five decades of research on psychotherapy for depression have been synthesised and presented, giving clinicians an extraordinary bird’s-eye view of what the evidence shows across a long span of time.
Bridging Research and the Therapy Room
One of the persistent challenges in clinical psychology is the gap between research and practice. Randomised controlled trials produce findings that can take years — sometimes decades — to filter into standard clinical care. Clinical psychology congresses exist partly to close that gap.
Presenters at these events include researchers who have spent careers building the evidence base, alongside frontline clinicians who can immediately translate findings into changed practice. The combination is powerful.
Themes discussed at recent gatherings have included stigma reduction, expanding access to care in underserved communities, the integration of digital tools into therapy, and culturally competent practice. These are not abstract concerns. They shape how millions of people receive — or fail to receive — psychological support.
The Connection to Global Mental Health Policy
Clinical psychology congresses do not operate in isolation. Their findings feed directly into the frameworks used by the World Health Organisation and into the national mental health policies of member states. When researchers present evidence that a particular intervention reduces hospitalisation rates, policymakers are paying attention.
This connection between clinical research and policy is one of the most underappreciated aspects of these gatherings. The international congress of psychology ecosystem — from basic science to applied practice to clinical research — functions as a pipeline from laboratory to legislation.
Why These Congresses Matter: Real Benefits for the Psychology Community
It would be easy to dismiss academic conferences as expensive networking events dressed up in intellectual clothing. But that criticism misses what actually happens at events like the international congress of psychology and its associated gatherings.
Accelerating Research Across Borders
Journals are the gold standard of academic communication, but they are slow. A study submitted today may not appear in print for 12 to 18 months. Conference presentations allow researchers to share preliminary findings, receive feedback, and refine their work before it is ever published. For fast-moving areas like digital mental health or trauma intervention, that speed matters enormously.
The international congress of psychology also provides a platform for researchers from lower-resourced countries to present work that might never reach the high-impact journals dominating Western academia. That diversity makes the collective knowledge richer and more representative.
Building Networks That Shape Careers
The relationships formed at these congresses have downstream effects that are difficult to quantify but impossible to ignore. Collaborations forged in a corridor conversation, a shared dinner, or a spontaneous deep-dive session have produced co-authored papers, cross-national studies, and research partnerships that span decades.
Early-career psychologists benefit especially from these environments. The Emerging Psychologist Programme at ICP 2024 gave young researchers direct access to established scholars, mentoring opportunities, and visibility for their work. These programmes are not incidental — they are a deliberate investment in the future of the discipline.
Influencing Policy at the Highest Level
Perhaps the most consequential function of these gatherings is their capacity to shape policy. At the 28th International Congress of Applied Psychology in Paris, attended by 4,500 psychologists from 101 countries, delegates unanimously affirmed their support for the United Nations Sustainable Development Goals — pledging IAAP’s commitment to ending poverty, reducing inequality, and promoting decent work for all. That declaration carried real weight and helped anchor IAAP’s work to a global ethical framework.
At ICP 2024, EFPA hosted a symposium directly aligned with UN SDGs and led panel discussions on psychology’s role in preventing armed conflict. These were not symbolic gestures. They were part of an ongoing effort to position psychological science as a tool for building a more peaceful, equitable world.
How to Engage With the International Congress of Psychology Without Attending in Person
Not everyone can make it to Prague or Beijing or Florence. Fortunately, engagement with the international congress of psychology ecosystem has never been more accessible.
The International Journal of Psychology regularly publishes supplemental volumes dedicated to congress proceedings. The 33rd congress proceedings, for example, were published in Volume 59 of the journal, running to more than 780 pages of abstracts and research summaries. It represents an extraordinary snapshot of where global psychology stood in 2024.
Many sessions are recorded and made available post-congress. Virtual and hybrid attendance options have become standard since 2020, and while nothing fully replaces the energy of an in-person gathering, these options have meaningfully widened access. Researchers from countries where travel funding is limited can now participate in conversations that were once closed to them.
National psychology associations — including those in South Africa (PsySSA), Europe (EFPA), the United States (APA), and dozens of others — regularly publish updates, travel grant opportunities, and call-for-abstracts notices ahead of each congress. Following your regional body is the most reliable way to stay informed.
Looking Ahead: Melbourne 2028
The 34th International Congress of Psychology is scheduled for Melbourne, Australia, in 2028, organized under the auspices of IUPsyS. Australia’s vibrant psychology community and its long tradition of cross-cultural and indigenous psychological research make Melbourne a fitting host.
Abstract submissions, travel grants, and early registration windows for events of this scale typically open 18 to 24 months in advance. If you are an emerging researcher or a student with ambitions to present on a global stage, 2028 is not too early to start planning.
Conclusion
The international congress of psychology is more than a conference. It is a living institution — one that has tracked the growth of a discipline from its earliest experimental roots to its current place at the centre of global conversations about human wellbeing, social justice, and public health.
From the streets of Paris in 1889 to the historic squares of Prague in 2024, and onward to Melbourne in 2028, each edition of this congress captures something the field cannot get anywhere else: the full picture of where psychology stands, what it is grappling with, and where it intends to go next.
The international congress of applied psychology, the international congress of clinical psychology, and the broader ICP ecosystem each play their part in a shared mission — to make psychological science serve humanity better. In a world facing mounting mental health challenges, environmental crises, and political instability, that mission has never been more urgent.
Whether you attend in person, follow proceedings through journals and virtual sessions, or simply stay connected through your national association, engaging with the international congress of psychology is engaging with the future of your field.
FAQ 1: What is the International Congress of Psychology? The international congress of psychology is the world’s largest and most prestigious gathering of psychologists, held every four years under the auspices of the International Union of Psychological Science (IUPsyS). It brings together researchers, clinicians, educators, and students from across the globe to share research, debate ideas, and shape the future direction of psychological science.
FAQ 2: How often is the International Congress of Psychology held? The international congress of psychology is held every four years, sponsored by the IUPsyS, and organized by a national host committee under the auspices of the Union in consultation with the IUPsyS Executive Committee. This quadrennial format gives each edition exceptional significance — far beyond what annual conferences can achieve.
FAQ 3: Where and when was the first International Congress of Psychology? The First International Congress of Psychology was held in Paris in 1889, followed by successive congresses in London (1892), Munich (1896), and Paris again in 1900. It was the earliest formal attempt to bring together psychologists from across the world under one academic roof, and it directly gave rise to the establishment of IUPsyS decades later.
FAQ 4: What was the theme of the 33rd International Congress of Psychology in 2024? The theme of the 33rd international congress of psychology was “Psychology for the Future: Together in Hope,” hosted by the Czech-Moravian Psychological Society, representing the collective aspiration for a future where psychology continues to be a cornerstone in building a better world. The theme reflected the discipline’s response to post-pandemic recovery, global conflict, and renewed hope for cross-cultural collaboration.
FAQ 5: How many people attended the International Congress of Psychology 2024 in Prague? The 2024 congress saw 3,973 participants on site, approximately 2,000 oral presentations, 1,108 poster presentations, 105 symposia, 27 panel discussions, 9 workshops, and 94 keynote addresses — with attendees from 95 countries across 5 continents. It was one of the most geographically diverse editions in the history of the event.
FAQ 6: Who organizes the International Congress of Psychology? The International Union of Psychological Science (IUPsyS) is the global umbrella organization for psychology and the official sponsor of the international congress of psychology. The IUPsyS Assembly — its ultimate decision-making authority — selects the host country through a transparent voting process, typically eight years before the congress is due to take place.
FAQ 7: How is the host country for the International Congress of Psychology selected? The IUPsyS Assembly selects the host country via a transparent voting process, taking into account factors such as geographical rotation among continents, the strength of the country’s psychological scientific community, communication capacity with the IUPsyS Executive Committee, and the affordability of registration fees and accommodation for participants worldwide. The host must be a member nation of IUPsyS, and the selection is typically made eight years in advance.
FAQ 8: Where will the 34th International Congress of Psychology be held? The 34th congress is scheduled for Melbourne, Australia, in 2028, under the auspices of IUPsyS. Australia’s strong psychology research tradition and geographic position make it a meaningful choice, particularly given the congress’s commitment to rotating across different global regions to ensure broad representation.
FAQ 9: What is the difference between the International Congress of Psychology and the International Congress of Applied Psychology? Two large multi-field international congresses are held quadrennially in alternate even-numbered years: the International Congress of Applied Psychology (ICAP) and the International Congress of Psychology (ICP). Overall, ICP is double the size of ICAP and represents a larger set of countries at each of its congresses. The ICP covers all branches of psychology broadly, while the ICAP focuses specifically on applied settings — workplaces, schools, clinical environments, and communities.
FAQ 10: What is the International Congress of Applied Psychology (ICAP)? The international congress of applied psychology is organized by the International Association of Applied Psychology (IAAP) and serves as a review of advances in applied psychology, uniting several thousand psychologists from around the world. Its mission is to promote the science and practice of applied psychology and to facilitate interaction and communication among applied psychologists around the world.
FAQ 11: When and where was the IAAP founded? The International Association of Applied Psychology (IAAP) was created in 1919 by Édouard Claparède under the name of International Association of Psychotechnics, with the present name adopted in 1955. Today IAAP boasts more than 1,500 members from over 80 countries and aims to promote the science and practice of applied psychology and to facilitate interaction and communication among applied psychologists around the world.
FAQ 12: Where will the International Congress of Applied Psychology 2026 be held? ICAP 2026 will be held at the Fortezza da Basso venue in Florence, Italy, with the Opening Ceremony taking place at the Teatro del Maggio Musicale Fiorentino on July 21. The congress in Florence is dedicated to new directions in applied psychology and represents a significant opportunity to relaunch the contribution that psychologists can offer in today’s geopolitical and socio-cultural landscape.
FAQ 13: Can students attend the International Congress of Psychology? Students can register for the congress at a reduced student fee, provided they submit official confirmation of their full-time student status from their department head immediately after registration. Most editions of the congress also feature dedicated Emerging Psychologist Programmes that give early-career researchers structured access to mentoring, presentations, and networking opportunities with senior scholars.
FAQ 14: What topics are covered at the International Congress of Psychology? The congress spans virtually every branch of psychology. At ICP 2024, topics included psychology’s contributions to the UN Sustainable Development Goals, mental health across Europe, psychology in conflict situations focusing on the war in Ukraine, empathy-building, negotiation strategies, and conflict-resolution mechanisms. Other recurring themes include neuropsychology, cross-cultural psychology, health psychology, developmental psychology, and digital mental health innovations.
FAQ 15: Does the International Congress of Psychology publish proceedings? Yes. The International Journal of Psychology (IJP) is the official journal of IUPsyS, published by Psychology Press. Congress abstracts and proceedings are published in a special supplemental volume of the IJP following each congress. The 2024 Prague proceedings, for example, spanned more than 780 pages, making them one of the most comprehensive snapshots of contemporary global psychology available.
FAQ 16: Is the International Congress of Psychology available online or virtually? In partnership with IUPsyS, the organizers offered online access to live streams and an on-demand library for those unable to attend in Prague, including Main Stage events, invited addresses, invited symposia, and the Opening and Closing Ceremonies, along with access to the ICP 2024 Mobile App for at least three months. Virtual and hybrid options have become a regular feature since the fully online 2020 congress.
FAQ 17: What is IUPsyS and how does it relate to the International Congress of Psychology? The International Union of Psychological Science (IUPsyS) is the global umbrella organization for psychology, representing around one million psychologists worldwide. It is composed of 93 National Members, 7 regional members, and 19 affiliate or special liaison organizations. The congress is the IUPsyS’s flagship event and its most visible expression of its mission to advance psychological science globally.
FAQ 18: How does the International Congress of Psychology influence global mental health policy? Based in part on the advocacy of psychologists active in international forums, mental health and well-being have for the first time been included in the UN 2030 Agenda for Sustainable Development. At ICP 2024, sessions directly addressed the alignment of psychology with UN SDGs, with EFPA and IAAP representatives presenting frameworks for turning research into government policy across multiple continents.
FAQ 19: Why did the 2020 International Congress of Psychology not take place in person? Many participants were looking forward to the ICP in Prague in 2020, but the COVID-19 pandemic forced the organizers to delay and switch to a completely virtual setting. Despite the disruption, the congress was considered a success, with nearly 4,000 active participants attending online, demonstrating the resilience and adaptability of the global psychology community.
FAQ 20: What is the Emerging Psychologist Programme at the International Congress of Psychology? The Emerging Psychologist Programme is a structured initiative run alongside the main congress specifically for early-career researchers and students. At ICP 2024, the programme provided young psychologists with direct mentoring access to established global scholars, opportunities to present their research, and dedicated networking sessions designed to accelerate their development at a formative stage of their careers.
FAQ 21: How does the International Congress of Psychology promote diversity and global representation? The international congress of psychology began to be held outside of Europe and North America in the 1960s, reflecting a commitment to recognise and encourage progress in psychological science worldwide. Today, geographical rotation among continents and countries is an important factor in the selection of host nations, with the IUPsyS Assembly likely to favour applications from major regions that have not previously hosted a congress.
FAQ 22: What was the role of the American Psychological Association (APA) at ICP 2024? At ICP 2024, a session chaired by the American Psychological Association delved into the broader impact of psychology on a global scale, specifically through its contributions to the work of the United Nations. The APA’s participation reinforced the increasingly collaborative nature of the congress, where national associations from across the world take active roles rather than simply sending delegates.
FAQ 23: How do the congresses reflect the changing global landscape of psychology? Analyses of recent ICP and ICAP congresses reveal that participation rates spike dramatically for host countries, and less dramatic regional surges in participation occur when the congress is held in a neighbouring country — demonstrating how geography still shapes engagement. At the same time, the rise of majority-world presenters, decolonisation frameworks, and cross-cultural research agendas at recent events reflects a genuine shift in who gets to define the discipline’s direction.
FAQ 24: What is the official journal of the International Congress of Psychology? The International Journal of Psychology (IJP) is the official journal of IUPsyS, published by Psychology Press. It serves as both a vehicle for ongoing psychological research and as the archive for congress proceedings. Abstracts accepted for each congress are published in a dedicated supplement of the IJP, giving every presenter’s work a formal, citable presence in the scientific literature.
