BIOS601 Resources: Surveys & Measurement

Measurement -- Lecture Notes, etc

• Notes & articles on Psychometrics for students in rehabilitation sciences
  
  1. Introduction to Measurement Statistics
  2. Quantifying Reliability
  3. Validity Statistics
  1 2 3 combined
  
  Reproducibility / Validity of Drano Test
  
  Statistical Methods for assessing agreement between 2 methods of clinical measurement
              (re-typed version of) Bland and Altman, Lancet 1986; i: 307-310)
  
  Statistical Methods for assessing agreement between 2 methods of clinical measurement
              (original) Bland and Altman, Lancet 1986; i: 307-310)
  
  Short note, "Validating scales and indexes", by same authors, BMJ 2002
  
  
• Data from various repeatability and validity/accuracy studies
  
  
  • Breath alcohol     article     data & R code
    
    
  • Novel Test of Endurance Running Performance    article     data & R code
    
    
  • Accuracy of Smartphone Applications and Wearable Devices for Tracking Physical Activity Data    article     Means abd SDs
    
    
  • Accuracy in Wrist-Worn, Sensor-Based Measurements of Heart Rate and Energy Expenditure in a Diverse Cohort
    
    article (.pdf)     Device Validation Datahub (Ashley Lab)
    
    
  • New measurements of total ionizing dose in the lunar environment [using a MicroMeter] article
    
    
• Data from Galton's Anthropometric Laboratory
  
  [For all of Galton's published anthropometry work, see the website http://www.galton.org
  
  Register of Measurements ...
  
  --- 0001-0491     0511-1028       Interview Pall Mall Gazette (Nov 16 '88): 1-2     '85 Article
  
  --- 1029-1530     1531-2020
  
  --- 2021-2520     2521-3021       Galton's Data a Century Later [1985 article]
  
  --- 3022-3521     3522-4000
  
  --- 4001-4500     4501-5000       Wellcome library
  
  --- 5001-5500     5501-6000       Codebreakers: Makers of Modern Genetics
  
  --- 6001-6500     7001-7459
  
  Spreadsheet for Data Entry (.csv)
  
  
• Additional Notes/Resources for students in BIOS601
  
  ... Effects of Errors in X and Y
  
  ... Notes from Applied Linear Models course for biostatisticians/statisticians
  
  ... Karl Pearson on why Galton got different parent-offspring correlations in heights
  ... and he (KP) got a larger/common correlation with his own data,
  ... carefully collected using this protocol for anthropometric measurements
  ... " `About', and other approximations " in Galton's listing of heights
              (courtesy bios601 student V.M.)
  
  
• ... The attenuation of correlation coefficients: a statistical literacy issue
   
  
• Expected mean squares (EMS) in fixed, mixed and rando effects (anova) models.. cf p28+ pdf
   
  
• Lecture Notes (from Measurement Course) on Measurement Statistics and Reliability
   
• Expected Mean Squares: Demos (Excel):
  1-way, fixed effects
  1-way, random effects
  simple linear regression
   
• Coverage of Variance Components in book by Armitage & Berry pdf
   
• Weight Gain: how much is in the genes?  Time/NEJM  Data / R & WinBUGS code
   
• Observer variation in measuring earlength   BMJ   Data/R/WinBUGS code
   
• (Automated) Blood Pressure and Pulse (Heart Rate) Measurements
  discarded by customers of Jean Coutu pharmacy
        pdf    .txt (Adobe Acrobat Optical Character Recogntion (OCR). caution: contains OCR errors)
   
• Galton's data on Family Stature (heights) of parents and siblings   raw data .csv file
   
• The Heritability of Otitis Media: A Twin and Triplet Study JAMA article   .csv file (Tall format)
   
  
• Notes and Exercises on Variance Components, Bios602, Winter 2011 pdf
  
  
• Random measurement error and regression dilution bias
  
      article by J Hutcheon, A Chiolero and J Hanley BMJ 2010;340: 1402- 1406.     Animation
        (see also, at bottom of this page. "Animation (in R) of effects of errors in X on slope of Y on X")
   
• Monitoring Cholesterol Levels: Measurement Error or True Change?
  
  article by Glasziou, Irwig, et al. Ann Intern Med. 2008;148:656-661
  
  
• Long term monitoring in patients receiving treatment to lower blood pressure: analysis of data from placebo controlled randomised controlled trial
  
  article by Glasziou, Irwig, et al. BMJ. 2009 Apr 30;338:b1492. doi: 10.1136/bmj.b1492.
  
  
• Measuring reaction times
  
  Patterns of performance degradation and restoration during sleep restriction and subsequent recovery: a sleep dose-response study
  
  Graph of data from this study [Fig ]
  
  Microcomputer analyses of performance on a portable, simple visual RT task during sustained operations (1985).
  
  Timing accuracy of Web experiments: A case study using the WebExp software package
  
  Online Tools
  
  * RED LIGHT - GREEN LIGHT Reaction Time Test
  
  * humanbenchmark.com
  
  * this one
  
  * This one was featured in this newspaper story: `Brain test judges how old you are based on your reaction time'
  
  * Ruler Drop Test
  
  A simple R program to measure reaction times and store the individual times from however many you do into a vector.
  
  Over the Hill at 24: (article, from Simon Fraser U.)
  
  Persistent Age-Related Cognitive-Motor Decline in Reaction Times in an Ecologically Valid Video Game Task Begins in Early Adulthood.
  
  Dataset used in the article
  
  - use the factor 1000/88.5 to convert the variable "ActionLatency" measured in "Starcraft 2 timestamps"
  to the "Looking-Doing Latency" variable (in milliseconds) used in the article.

Quality of Handwriting

• The truth about doctors' handwriting: a prospective study Berwick, BMJ, 1996
   
  
• Handwriting Samples pdf
  

Computer code to simulate datasets with measurement error

• Computer code to simulate datasets and look at sampling distribution of parameter estimates
  temperatures measured with error - SAS
  
    temperatures measured with error - R

Animation (in R) of effects of errors in X on slope of Y on X

• R code for 'animation' package .R file
  
   
• A completed animation .pdf file
  
   

An (undiscovered for almost 300 years) Bernoulli Error? or Not?

• Items by Bernoulli, Champkin, Edwards, and Sylla
  
   
• R code by JH
  
   
• Edwards 1; Bernoulli 1 !!
  
   

  Questions from ch 3 of Moore & McCabe 3rd Edition

  • 3.33, 3.34, 3.35, 3.36, 3.39, 3.41, 3.43, 3.44, 3.45, 3.46, 3.47, 3.48, 3.49, 3.50, 3.57, 3.72, 3.74, 3.79