AtlasSession 4L12: Introduction to measurement errors and diagnostic test accuracy studiesp.18–24, 36, 50
Assessing measurement error
Fig. 1
% viable hepatocytes in a bioprinted liver construct by image analysis: what to compare, and how
Fig. 1: decision flowchart “How do you check a measurement?”. Case: Image analysis vs flow cytometry. % viable hepatocytes in a bioprinted liver construct by automated image analysis, compared with flow cytometry as the reference standard. Question: Can you check against the best available answer? Answers: 1 Yes, 2 No.
- Case
- Image analysis vs flow cytometry
- Question
- true value?
- Your answers
- none yet
- How it’s going
- — (answer the first question to see how it’s going)
- Score
- 0/7 (no cases finished yet)
Decision Flowchart Walker · First look
Level 1 · First look · Lecture 12 · p.18–24, 36, 50
Say what you compare a measurement with to check whether it is right, repeatable, or affected by where you look.
Decide what to compare (reference standard, a repeat, or a different sample) and which method suits binary or quantitative data, using index test, reference standard and target condition correctly.
Kitchen scale (the step you are on)
Check it with a certified weight, weigh one bag twice, then weigh another bag.
Check a kitchen scale three ways: weigh a certified weight (is it right?), weigh one bag twice (does it repeat itself?), then weigh another bag (does the bag you pick matter?).