Last revised 9/21/2026

Psychology: Big Ideas

Secondary

Mental models for A-Level Psychology, AP Psychology, and IB DP Psychology.

Psychology: Big Ideas distils the discipline to eight foundational ideas that every advanced psychology student must own. Across eleven articles, the collection moves from the biological basis of all mental processes through the reconstructive nature of memory, the dominance of unconscious cognition, the power of situations over personality, the evolutionary origins of psychological mechanisms, gene-environment interaction in development, multiple determination of behaviour, and the evidential standards that psychological claims must meet. Three synthesis articles address the most commonly missed disciplinary ideas, the expert psychological worldview, and a ten-claim compression of the full framework.

2Modules11Sessions120Cards22Quizzes

Modules in this Collection’s System

Hover a module to read it directly

The Eight Big Ideas

How every mental process is implemented in the brain and changes when the brain changes; how memory actively reconstructs rather than passively reproduces, making confident recollection capable of being wrong; and how most of the mind's processing occurs below the threshold of awareness.

8Sessions

Synthesis and Expert Thinking

How all psychological outcomes are multiply determined by biological, psychological, and social factors simultaneously; how psychological claims require converging evidence from multiple studies given the inherent limitations of any single experiment; and how the three most often missed disciplinary ideas and expert thinking patterns connect all eight ideas into a unified framework.

3Sessions

What You'll Walk Away With

A framework for evaluating any psychological claim: sample, design, effect size, replication status, cultural scope
A mental model of biopsychosocial causation that resists single-factor explanations of any psychological outcome
A working understanding of why memory and introspection are unreliable sources of psychological truth
A vocabulary of core concepts — heritability, preparedness, FAE, reconsolidation, GE correlation — for exam and discussion

You'll Have Answers To

?How does brain damage change personality, and what does this tell us about the relationship between mind and brain?
?Why is eyewitness testimony so often wrong even when the witness is confident and consistent?
?What does it mean that most cognition is unconscious, and how does this change what psychology can study?
?Why do situational factors predict behaviour better than personality in strong situations — and why do we keep ignoring this?
?What does heritability actually measure, and why can't it answer the question of how much of a trait is genetic?

Critical Concepts Explored

neuronsynapseneurotransmitteraction potentiallesion studydouble dissociationhippocampusanterograde amnesiaSSRIdopamineschemaencodingretrievalreconsolidationmisinformation effectautomatic processingcontrolled processingStroop effectprimingconfabulationimplicit associationamygdalaMilgramobediencefundamental attribution errorAsch conformityenvironment of evolutionary adaptednesspreparednessparental investmentmismatch hypothesisheritabilityreaction rangeGE correlationepigeneticscritical periodbiopsychosocial modeldiathesis-stressreplication crisisWEIRDeffect sizepre-registrationmeta-analysisexternal validity

Editor's Brief

Who it's for: Students preparing for A-Level Psychology (AQA, OCR, Edexcel), AP Psychology, or IB DP Psychology who want to move beyond content memorisation to disciplinary understanding. Also suitable for first-year university students and anyone seeking a conceptual framework for evaluating psychological claims in media and public discourse.
What stands out: The collection treats psychology as a set of structural commitments about causation and evidence rather than a catalogue of studies. It does not just describe what psychologists have found — it explains why the discipline thinks and works the way it does, which is the understanding that exam questions at A-Level and IB DP level actually require.
Read if: You want to understand why psychology is harder than it looks; why a significant result is not the same as a true result; why behaviour is never caused by just one thing; and why the same genes produce different people in different environments.

Gold Quotes

The brain is not the organ that produces mind — it is the organ that IS mind.

Every thought, memory, and emotion is neural activity; damage the brain and you change the person, because the person is what the brain does — there is no remainder.