Psych/Soc, statistics, and epidemiology

Sensitivity, specificity, and predictive values

Sens = TP/(TP + FN)  ·  Spec = TN/(TN + FP)  ·  PPV = TP/(TP + FP)

TP true positives, FN false negatives, TN true negatives, FP false positives

Watch forSensitivity and specificity don't change with prevalence; PPV and NPV do.

Apply it · 3 questions

  1. Positive predictive value and prevalenceData and statistics · set 1 · hard
  2. Calculating positive predictive valueData and statistics · set 1 · hard
  3. Calculating sensitivityData and statistics · set 1 · easy