Mental health by age is not one smooth rise — the GBD 2023 figures peak in adolescence before changing direction
You arrived looking at mental disorders by age because one number cannot explain every life stage. In the GBD 2023 ... Read…
CAADRIA
Cognitive, Affective And Developmental Research Insights Archive
Your mind is more interesting than the myths about it.
CAADRIA — the Cognitive, Affective And Developmental Research Insights Archive — turns real psychology research into guides you can test on yourself: self-checks, experiments and myth-busting you can feel working.
Predict the finding
In a famous study, people watched a basketball video while a person in a gorilla suit walked through the middle of the game. What share of viewers never noticed the gorilla?
0%
Roughly half of viewers missed the gorilla entirely (Simons & Chabris, 1999). Attention isn't a camera — it's a spotlight, and everything outside it can simply vanish.
Why your brain does this →The archive
Six rooms of the mind
Anxiety & stress
What worry is for, when it misfires, and evidence-based ways to work with it.
Memory & attention
Why you forget names, miss gorillas, and how to actually remember things.
Personality
The Big Five, what's stable, what changes, and what tests can really tell you.
Relationships
Attachment, conflict, connection — what the research says actually helps.
Sleep & habits
The science of rest, routine and behaviour change that sticks.
Biases & decisions
The predictable glitches in human judgement — and how to catch your own.
Myth lab
Guess before you flip
Fresh from the archive
All articles → 
If you keep asking whether spouse or adult-child caregiving is harder, the answer isn’t a universal family-role rule — studies point to conditional differences across care settings
You are weighing care for an aging spouse against care for an older parent, and the research gives no simple ... Read…
Winter tiredness isn’t laziness — it’s a seasonal mood pattern
You wake later, feel flat, eat more, and struggle to think once the season turns. Could these changes count as ... Read…
People who feel low in winter do not necessarily have a severe seasonal illness — research spans ordinary seasonal shifts, measurable impairment, and clinical winter depression
You notice your mood sinking as the days grow darker, then wonder whether the pattern means something specific. The research ... Read…
People who notice lower mood, energy, sleep, or appetite in winter don’t necessarily have seasonal affective disorder — those seasonal shifts appear often in surveys
You notice your mood dropping as winter arrives, and the numbers give a careful answer: seasonal changes are common in ... Read…
You do not settle a seasonal mood question by where you live — location alone cannot replace the pattern, symptoms, and daily impact researchers actually measure
You notice the same shift each year: lower energy, more sleep, and a heavier mood when the season changes. Seasonal ... Read…
How we work
Research first, hype never
Every claim on CAADRIA traces back to published research — and when studies disagree or fail to replicate, we say so. Interactive self-checks run entirely in your browser: your answers are never stored or sent anywhere.
- Claims cited to published studies
- Replication status flagged honestly
- Self-checks run in your browser only
- Educational content, clearly not therapy
Before you ask
Common questions
The short version: educational, evidence-based, and never a substitute for professional care. Details on the right.
What does CAADRIA stand for?
The Cognitive, Affective And Developmental Research Insights Archive — the three pillars of psychological science (thinking, feeling, growing) in one library.
Are the self-checks real psychological tests?
They are educational versions built on open, validated research instruments. They can show you patterns worth reflecting on, but they are not clinical assessments and cannot diagnose anything.
Do you store my quiz answers?
No. Interactive checks run entirely in your browser. Nothing you answer is stored on our servers or sent anywhere.
Is this a substitute for therapy?
No. CAADRIA is an educational publication. If you are struggling, a qualified mental-health professional is the right person to talk to.
CAADRIA is an independent psychology publication. Our content is educational and is not a substitute for professional mental-health advice, diagnosis or treatment. If you are struggling, please reach out to a qualified professional.