How fast people react on average, what influences the numbers, how reaction time relates to intelligence and how to measure it in a way that means something.

Brain-training apps, free IQ test apps, test-prep portals and test practice apps. What the four categories deliver, what they cost and who they are for.

Which intelligence tests are used with children, what they are for, what preparation achieves for gifted-programme screening and where it is out of place.

Which item types appear in aptitude and cognitive ability tests, how to approach each one systematically and how to manage the clock. No tricks, just method.

Dual n-back, brain training, practice effects. What meta-analyses show about the trainability of intelligence, and what follows for test preparation.

How 3×3 figure matrices are built, the four rule types per attribute, and the elimination method that gets you to the answer reliably.