As DP Coordinators and teachers pore over this year’s IB Diploma results, now is the time to think not just about content delivery, but on how your students are learning. The key to improving your school’s performance probably isn’t more revision sessions, tougher mock exam marking, greater intensity with internal assessments or even more teacher training…, the key to success in school is much more likely to be a shift in student mindset, habits, and engagement.
IB Diploma Psychology – Success at high school or college, written by a teacher with 30+ years of experience, offers exactly that: a practical, common-sense guide to helping students become more disciplined, proactive, and resilient—qualities that consistently lead to stronger academic outcomes in school and beyond.
Unlike quick-fix test strategies, this book provides a blueprint for long-term success: attending every class, managing time effectively, building positive relationships with teachers, and understanding how learning actually works. It’s simple, clear, and designed to be implemented now—not in theory, but in everyday student life. This book is practical – and it’s written for and to your students.
If you’re serious about lifting your students’ IB Diploma results in 2026 and beyond, make this book part of your school’s toolkit. It may be the most powerful change you make this year.
At this stage of the two-year IB Diploma course, many teachers are wondering about their students’ final grades, perhaps trying to reconcile what they considered a near-perfect mock exam result and a near-perfect Internal Assessment result with the middley grade that the student eventually received following the actual exam session. Some teachers question their ability to interpret the Subject Guide and the assessment criteria descriptors, but they shouldn’t, especially if they’ve put time and effort into reading and understanding the Guide, attending training workshops and engaging with their MyIB subject community.
During the exam session, the students’ exam scripts are sent to the markers via a scanning centre. The students’ answer papers are scanned and uploaded to the online marking database. Markers, who have received mark schemes and undergone training then access the database and read/mark the exam scripts. They do this quickly to meet deadlines and quotas.
About every 10th exam script is called a ‘seed’; it has already been marked, and the marker’s marks are compared with the existing marks. If the marker’s marks are within an acceptable tolerance range, the marker continues to access the database of exam scripts. If the marker’s marks are too different from the seed’s marks, the marker is diverted for more training, and may return to the database of scripts if/when their marking becomes more accurate/aligned with those of the chief marker (sounds Orwellian, right?)
Each marker is assigned to mark only Paper 1, 2 or 3.
Now the computer takes over. The marker’s marks are moderated to be consistent with the chief marker’s marks. This is an attempt to standardise the marker’s marks through the whole marking session.
A combination of people and computers confirm the mark boundaries. People will pull out papers on the boundaries, read answers and ask if this set of answers is consistent with the Grade 7, 6, 5, etc. descriptors. The computer then adjusts grades to ensure a certain percentage of students achieve a 7, 6, 5… This is called scaling. It can be controversial, especially when assessment is supposedly done with respect to assessment criteria descriptors which are objective and in theory are either achieved or not achieved. Scaling though protects against grade inflation, which can occur when teachers and students learn what is required to achieve a 7 as each set of results occurs, a greater % students achieving the higher grades.
The internal assessment is marked by teachers and the grades for each of the 4 criteria are entered into IBIS. IBIS then selects a sample of high, middle and low scoring IAs and the DPC uploads the digital copy of the selected sample which are then check marked by an experienced and trained/supported moderator. This moderator enters a grade for each criterion and the computer software then adjusts the teacher’s full set of results (not just the sample IAs’ results)… for exam Criterion A marks may be moderated up by a small percentage and Criterion C grades might be moderated downwards by a lot and Criteria B and D may not change. These moderations are applied to a school’s full cohort, pro rata, i.e. taking into account the unmoderated marks awarded by the teacher. It’s an odd procedure based on dubious logic. (It’s really odd when a moderator’s own students’ IA marks are moderated by a different moderator and the marks go down by a lot.)
These moderated marks are then scaled to match an expected % of grades. And yes, that’s also contrary to the philosophy of criteria-based assessment.
There’s a lot to like about this assessment system. Human markers’ grades are checked frequently to ensure they match the chief marker’s standard for each component (Papers 1, 2, 3, and the IA). The papers at the grade boundaries are checked against the grade descriptors. IA moderators’ marks are moderated by senior moderators…, and then the computer applies grade boundary checks and scales marks to meet grade distribution expectations.
And when grades are received students can submit an EUR – an enquiry upon results at several levels… check the component marks were correctly calculated, a re-mark of papers or even the IA which is problematic to understand because a student excluded from the sample may have to find and then submit their IA even if it was not one of the uploaded sample of IAs selected for moderation. That doesn’t bear thinking about for too long though. If the student’s grade (not mark) changes after an EUR the (hefty) fee is refunded, but if not, not, so… that doesn’t bear thinking about for too long either.
The big question that many teachers ask is, ‘Why are the actual grades not as good as the grades I think their students should get?’
We tend to mark our students higher than real examiners because we tend to give our students ‘benefit of the doubt’ marks.
Markers are less patient with difficult-to-read handwriting, while teachers come to learn the students’ handwriting.
Markschemes tend to be written with more detail than the subject guide’s assessment descriptors.
Teachers sometimes base marking on ‘knowledge’ gathered from unofficial, for-profit subscription-based sites and really unofficial sources such as Facebook groups. Psychology has one FB group that is well known for distributing incorrect information – and now you’ve now been warned!
Scaling. It’s quite likely that experienced teachers’ marks are similar to the actual marks, but after papers and IAs have been marked/moderated, the marks are scaled so that the grades are distributed as per IB’s grade distribution ‘formula’ for each subject. The difference (and the cause of so much angst) is likely due to the scaling factor.
In the end though, the grades are just one pillar of what students, teachers and schools achieve. In many ways, that final grade can be distorted, for example, which subjects were chosen to construct the student’s Diploma, which subjects were done at HL and SL, was Language B really a student’s second language or a second first language, how much support was given with the IAs, EE, TOK assessments, how much time went into CAS, etc. What we do know is that most IB Diploma students develop critical thinking skills, they develop an appreciation for internationalism and they appreciate the value of creativity, activity and service. And they all develop in alignment worth the Learner Profile to some extent – becoming better communicators, more open-minded, more thoughtful, more caring… and the IB doesn’t scale these (probably). So… don’t stress too much about the number on the results page. Our students and the teachers’ efforts will always be more than that Diploma score.
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For decades, scientists debated whether adult human brains can generate new neurons, a process known as neurogenesis. While neurogenesis had been documented in animals, evidence in humans was inconsistent—until now. A July 2025 study (Dumitru et al., 2025) offers compelling proof that new neurons are produced in the adult human brain, with clear identification of the neural precursor cells responsible for this process.
Researchers at the Karolinska Institute examined postmortem brain tissue from individuals aged 13 to 78. Using advanced RNA sequencing techniques, they identified molecular markers of immature neurons and precursor cells in most brains. These findings confirm that neurogenesis occurs throughout life, particularly in the hippocampus, a brain structure central to memory and learning—and a key site of neurotransmission.
This discovery is relevant to the study of neurotransmission because new neurons contribute to brain plasticity, synaptic communication, and potentially the regulation of neurotransmitters. The hippocampus, rich in glutamate, GABA, and dopamine receptors, may rely on newly generated neurons for encoding new memories and emotional regulation.
Interestingly, two adult brains showed unusually high levels of neurogenesis; one belonged to a person with epilepsy, raising questions about how increased or disrupted neurogenesis might affect brain activity. In animal studies, altered neurogenesis has been linked to depression and Alzheimer’s disease, suggesting a role for new neurons in mental health and neurological disorders.
This study closes a major gap in our understanding of brain development and opens new avenues for researching how neurotransmission is influenced by ongoing neuron formation. It also raises key questions for psychology: How might neurogenesis affect behaviour? And can this process be enhanced to support mental health?
Reference:
Dumitru, I., Paterlini, M., Zamboni, M., Ziegenhain, C., Giatrellis, S., Saghaleyni, R., … Frisén, J. (2025, July 3). Identification of proliferating neural progenitors in the adult human hippocampus. Science, 389(6755), 58–63. https://doi.org/10.1126/science.adu9575
We’ve just created a new free worksheet designed to support DP Psychology (Higher Level) students exploring Motivation within the Cognition and Learning context. It’s particularly useful for developing responses to Paper 3, Question 4, which asks students to consider how the learning or cognitive process studied (in this case, motivation) relates to Learning and Cognition.
The worksheet draws on an article by The Hechinger Report, which follows a student’s shift from disengagement to renewed motivation after enrolling in an innovative, student-led high school. Using this real-world example, students are introduced to key concepts from Self-Determination Theory (Deci & Ryan), including intrinsic and extrinsic motivation, and the psychological needs of autonomy, competence, and relatedness.
The worksheet includes:
A clear 500-word text explaining Deci & Ryan’s Self-Determination Theory,
A vocabulary list (Psychology-specific terms)
Comprehension (AO1&2) and Critical thinking (AO3) questions
This is a valuable, ready-to-use resource for helping students develop deeper conceptual understanding of motivation while also preparing them for Paper 3 Question 4.
Download the worksheet [below], and don’t forget to Subscribe to the blog for updates.
In Psychology, culture means the values, beliefs, norms, behaviours, and practices shared by a group of people. Culture influences how we think, communicate, behave, and perceive the world around us.
The Carpentered World Hypothesis states that exposure to straight lines and right angles in architecture affects visual perception (a cognitive process).
The worksheet (below), summarises an article in The Guardian relating the role of Culture in Perception. The worksheet guides students to think about and discuss the role of Culture in the Learning and Cognition Context, linking to the Concept of Perspective.
We’re excited to share a new (and free) resource created to support teachers and students in the new IB Diploma Psychology course: “How to answer exam questions.”
This document will demystify the exam requirements across Papers 1, 2, and 3. It provides clear, structured guidance on how to approach every question.
Step-by-step structures for each question
Tips for content selection and writing focus
The document is provided in Word format so you can copy and edit it to suit your purposes or share it directly with your students. A suggested use: Give a copy to students when they are doing practice exams so they can see exactly how to structure their responses.
We hope this document helps make exam preparation a little smoother for everyone. Feel free to share it with colleagues.
If you’re looking for even more comprehensive support, check out our book IB Diploma Psychology – Ten Mock Examinations with Model Answers. It includes TEN full mock exams (Papers 1, 2, and 3) complete with high-scoring sample responses for every question. Use it to plan your mocks, guide student revision, and sharpen your understanding of exactly what to teach for exam success.
This post is about a Worksheet (below) that teachers can use in the first week or two of the course to introduce students to the 6 big Concepts of the course and to allow a conversation about the significance of good research. The worksheet includes a very recent article from BBC News (June 20th, 2025) and a collection of activities for students to complete, perhaps in small groups, perhaps individually, perhaps for homework…
The birth order theory
Is the first-born always the responsible one and the last born always the fun-loving rebel?
The birth order theory suggests that your position in the family (firstborn, middle child, youngest, or only child) shapes your personality in predictable ways:
Firstborns are said to be more responsible and achievement-focused.
Middle children are often described as peacemakers or attention-seekers.
Youngest siblings are thought to be fun-loving and rebellious.
Only children are sometimes stereotyped as selfish or overly mature.
These ideas are fun to talk about at dinner tables — and even show up in TV shows and social media memes — but do they hold up to scientific scrutiny?
The research says… no.
Decades of research have tried to pin down whether birth order really causes differences in personality. While some studies have found small patterns — for example, that firstborns might score slightly higher on intelligence tests — larger and better-designed studies have found no consistent, universal effects of birth order on broad personality traits.
That doesn’t mean birth order has zero impact. It may shape behaviour in specific family contexts or cultures, and people’s beliefs about birth order can shape their identities. But overall, there’s very little evidence to say that your position in the family determines your personality in any reliable or scientific way.
This example gives us a good way to start understanding the six key Concepts of IBDP Psychology:
1. Bias
We tend to notice evidence that confirms our expectations and ignore what doesn’t — a classic example of confirmation bias. If your older sister is bossy, you might say “Well, obviously, she’s the eldest.” But what about all the bossy youngest children?
2. Causality
Is it really birth order that causes certain traits? Or could it be age, parenting style, socioeconomic status, or even gender expectations? Psychology often grapples with correlation vs. causation, and birth order is a great example of that complexity.
3. Measurement
How do we measure personality? Many studies rely on self-report questionnaires, which come with limitations. People might describe themselves based on how they think they’re supposed to behave as an oldest child, not how they actually behave.
4. Perspective
The impact of birth order may differ between cultures and families. In some societies, firstborns may carry traditional responsibilities, while in others, birth order is far less significant. Perspective reminds us that psychology is not one-size-fits-all.
5. Change
Your personality and family roles can shift over time. A younger sibling might become more responsible later in life. Psychology recognises that behaviour and identity are not fixed, but dynamic.
6. Responsibility/Ethics
If we assume someone’s behaviour is fixed by their birth order, that can be limiting — even harmful. Ethical psychology considers the social consequences of labelling, stereotyping, and drawing broad conclusions from incomplete evidence.
In the first week of IB Psychology, we’ll use this birth order debate to practice:
Asking critical questions about theories and research
Exploring the six Concepts in real-world contexts
Discussing beliefs vs. evidence, and developing a scientific mindset
You’ll be using the attached worksheet to guide your thinking and conversation. Don’t worry — you don’t need to be an expert in Psychology yet. The goal is to start asking smart questions and learning how to evaluate claims, whether they’re in a textbook, a TikTok post, or a family argument at dinner.
Final Thought
What is your birth order? (First-born, middle child, youngest, only child, twin, etc.)
Do you think your birth order has influenced your personality or behaviour? If so, in what ways?
Do people ever describe you using “birth order” traits? (e.g. “You’re such a responsible oldest child” or “Typical youngest!”) Do you agree or disagree with those descriptions?
How are your siblings’ personalities different from yours? Do you think these differences are because of birth order, or something else?
Do you think all first-borns are more responsible? All youngest siblings more fun or rebellious? Why or why not?
Do you think people act a certain way because of their birth order — or because they believe birth order affects their behaviour? Can belief shape personality?
Do cultural or family expectations influence how children behave based on their birth order? Can you think of an example?
Have you ever changed your role in the family over time? For example, were you once the “quiet one” but became more assertive? What caused that change?
Do you think only children are different from children with siblings? In what ways, and why?
If someone knew nothing else about you except your birth order, what might they assume about your personality? Do you think they’d be right?
These questions can lead to some rich and open discussion — and they provide a natural bridge into critical thinking, the importance of evidence-based research, and the limitations of generalisations in psychology.
Psychology is full of ideas that sound right — but part of becoming a psychologist is learning to dig deeper. The birth order theory may not be strongly supported by data, but it gives us the perfect launchpad into the skills, attitudes, and concepts that define this course.
The global Psychology community mourns the loss of a pioneer. Dr Phil Silva, founder of the world-renowned Dunedin Multidisciplinary Health and Development Study – better known simply as the Dunedin Study – passed away on Thursday at the age of 84.
For IB Diploma students, the Dunedin Study on which the longitudinal study that Caspi et al. (2003) is based.
Dr Silva’s legacy is nothing short of extraordinary. In 1972, he began following the lives of 1037 babies born at Queen Mary Maternity Hospital in Dunedin. Over 50 years later, the study continues, with a participation rate of around 90% – an unmatched achievement in longitudinal research worldwide.
As psychology teachers, we often search for meaningful case studies that demonstrate the real-world impact of psychological research. The Dunedin Study is one of those rare, gold-standard examples. It has helped reshape our understanding of child development, health, education, and mental wellbeing – and much of its success is owed to Dr Silva’s vision, energy, and compassion.
Before becoming a psychologist and researcher, Phil Silva was a primary school teacher. Teaching rural children in the 1960s deeply influenced his later work – a foundation built on empathy, curiosity, and a commitment to supporting young people and their families. That passion carried through into his academic career, where he completed a master’s and PhD under Otago University’s Dr Patricia Buckfield, who herself had a keen interest in neonatology.
Together, their early work collecting data on babies born in Dunedin from 1967 to 1973 laid the groundwork for the creation of the Dunedin Study. But it was Silva’s leadership, drive, and charisma that propelled the project forward. Against the odds – with minimal funding and few formal resources – he rallied hundreds of volunteers who believed in his mission to improve children’s lives.
Silva’s research didn’t just stay in academic journals. It influenced public health policy, helped normalise routine check-ups for preschoolers, and highlighted the impact of conditions like glue ear on child development. He spoke passionately about the need for society to prioritise children’s wellbeing. In one memorable critique, he noted that New Zealanders were more likely to service their cars than check on the health of their children – a powerful call for compassion and systemic care.
His work was internationally recognised. In 1993, the Dunedin Study made the cover of Time magazine under the headline: “All You Need is Love”. A year later, Silva was awarded an OBE for services to health and education.
Dr Silva’s influence extended far beyond data collection. He was a mentor to the late Professor Richie Poulton, who succeeded him as study director, and to the current director, Professor Moana Theodore, who first joined the team as an interviewer during the age-26 assessment phase.
Theodore describes him as “an energetic mentor” with a unique ability to bring people together in service of a bigger purpose: improving lives. That ability is reflected in the enduring loyalty of study participants – many of whom have stayed involved for over five decades.
She beautifully summed up his contribution:
“Dr Phil has left this legacy and a taonga [prized treasure] for New Zealand… the best childhood foundation guarder in the world – and the most studied group of people anywhere in the world.”
For those of us teaching psychology, the Dunedin Study is a model of longitudinal research excellence. It’s a case study we can use not only to explain developmental psychology, biopsychosocial models, or research methods—but also to inspire our students to see how psychological science can serve real people, communities, and policy.
Dr Phil Silva didn’t just collect data—he created change. He showed us what psychology could be at its best: compassionate, evidence-based, and relentlessly committed to human wellbeing.
Let us honour his legacy by continuing to teach with the same curiosity, purpose, and care.
Rest in peace, Dr Silva. Your work lives on—in policy, in classrooms, and in the lives of 1037 individuals who helped the world better understand what it means to grow, change, and thrive.
While the IB provides just one sample exam on the MyIB Programme Resource Centre, Tom Coster’s book goes much further – TEN full-length exams (Papers 1, 2 and 3), each with high-scoring student responses. These sample answers give students and teachers a very clear insight into what a top-level response looks like.
Instead of guessing what earns a 7, readers can analyse near-perfect responses, identify successful strategies, and improve their own writing and exam technique. For teachers, it’s a time-saving tool for revision, assessment preparation, and modelling high standards. For students, it’s like having a roadmap to exam success.
One of the most exciting features of the new IB Diploma Psychology course is the emphasis on class practicals, which give both Standard Level (SL) and Higher Level (HL) students a chance to engage directly with psychological research methods. These activities are more than just experiments, they are designed to support critical discussion of each research approach, helping students build practical understanding while making connections to real-world contexts.
Class practicals are embedded into each of the course’s four contexts: Health and Well-being, Learning and Cognition, Human Development, and Human Relationships. Each context is linked with a specific research method:
In Health and Well-being: Interview.
In Learning and Cognition: Experiment.
In Human Development: Observation.
In Human Relationships: Survey/Questionnaire.
Interview
Each Context in the Subject Guide includes a list of suggested class practicals, but these are examples only and teachers are encouraged to tailor the activities to their own students and their local setting. For instance, under the Health and Well-being context, students could conduct focus group interviews on how peers manage stress, or investigate student perceptions of mindfulness practices after a class activity. Other examples include semi-structured interviews with professionals such as school counsellors or fitness coaches, or interviews exploring links between social media use and self-esteem, or exercise habits and mood.
Importantly, Tom Coster’s Textbook includes dedicated guidance for the In Class Practicals in each context, helping both teachers and students make the most of these learning opportunities.
The In Class Practical is not just a learning activity — it is also formally assessed in Paper 2, Section A, where students respond to four structured questions related to one of the 4 Practicals they completed. These questions test students’ understanding of methodology, concepts like bias or ethics, and the ability to design or compare research approaches.
In short, In Class Practicals bring psychology to life, giving students the opportunity to be researchers themselves and fostering deeper, more critical engagement with the subject.
Here is a free downloadable document describing how to complete the In-Class Practical for an interview. It includes summary notes that students would use to prepare for Paper 2 Section A.
Tom Coster - Psychology 