This Child Abuse Potential (CAP)Inventory boasts an accuracy rate of approximately 90%.Properly interpreted,this means that
A) 90% of the people who score high on the CAP physically abuse children.
B) 90% of the people who score low on the CAP do not physically abuse children.
C) in groups with a 50% base rate, 90% of those who abuse children are correctly identified.
D) that in groups with a 90% base rate, 50% of those who abuse children are correctly identified.

Question

Quizplus · Accepted Answer

An accuracy rate of 90% means that out of a group of individuals who are known to physically abuse children (base rate of 50%), 90% will be correctly identified as high risk using the CAP Inventory. This does not mean that 90% of all individuals who score high on the CAP physically abuse children (Answer A), nor does it mean that 90% of those who score low on the CAP do not physically abuse children (Answer B). Additionally, it does not mean that in groups with a 90% base rate, 50% of those who abuse children are correctly identified (Answer D).

This Child Abuse Potential (CAP)Inventory Boasts an Accuracy Rate of Approximately