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One Kard, in four steps.
Memory and Learning

The testing effect

— What retrieving does that rereading does not

Recalling something strengthens the memory more than restudying it does — even though the recall attempt feels harder and the restudy feels more productive. The effort of pulling the answer out is a large part of the learning.

I don’t understand this

Back a few Kards later, and again soon after.

Scheduled further out — and further again each time.

A real Kard from Memory and Learning

In private testing — not on the App Store yet. Early access is just your email address.

Adaptive

Your material, in the shape it already had.

Four kinds of idea, and the Kard each became.

Your material

What came back

Statistics Without the Fog

Standard deviation and standard error

— What each one is the spread of

Standard deviationStandard error

Spread of

the observed values

the estimate across samples

With a larger sample

no systematic shrink

usually shrinks

Answers

how variable are the values?

how precise is the estimate?

How the Heart Works

The cardiac cycle

— The order of events in one beat

  1. Atrial contraction completes ventricular filling
  2. Isovolumetric contraction — mitral and tricuspid valves close
  3. Ejection — aortic and pulmonary valves open
  4. Isovolumetric relaxation — aortic and pulmonary valves close
  5. Passive filling — mitral and tricuspid valves reopen
Pharmacology Patterns

Raising a maintenance dose

— What happens to the steady-state level

It depends on whether the enzymes clearing the drug still have spare capacity.

First-order elimination

The level rises in proportion to the dose

Zero-order, saturated elimination

The level climbs out of all proportion to the dose

Pharmacology Patterns

Half-life

— What it measures

The time for the concentration to fall by half. It strongly influences how long concentrations persist, and helps inform a dosing interval — alongside the therapeutic range, the formulation and what the drug is being used for.

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Vancomycin clearanceI don’t understand this

Why the dose follows clearance

Vancomycin leaves the body through the kidney, so how fast a patient clears it decides how much they can be given.

  1. Kidney function falls
  2. Vancomycin is cleared more slowly
  3. Each dose adds to what is still in the blood
  4. The trough concentration climbs

Toxicity risk rises unless the dose or the interval changes.

What matters

  • Weight sets the first dose; clearance sets every one after it.
  • Slower clearance means more of the previous dose can remain before the next one.

Your material gives the rule but does not say what to do when clearance changes mid-course.

Renal Pharmacology — Lecture 7 · pp. 14, 22

The shelf

Nine decks, before you upload anything.

  • Physiology

    How the Heart Works

  • Psychology

    Memory and Learning

  • Pharmacology

    Pharmacology Patterns

  • Biology

    Cell Biology Foundations

  • Economics

    Markets and Prices

  • Statistics

    Statistics Without the Fog

  • Chemistry

    Chemistry Patterns

  • History

    World History Connections

  • Computer Science

    Computer Science Foundations

Written by us, and held to the same standard as anything you import. They have no document behind them, so nothing to cite and no Tutor explanation to ask for.

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