What are Type 1 and Type 2 errors?
The success of a selection protocol depends not only on the selection system’s efficiency but also on the resources invested in training admitted candidates including those who subsequently fail. Continuing in-house validation makes it possible to come back to the selection phases and adjust/add/remove selection components. With this in mind, there are two types of errors your selection protocol will encounter. A Type 1 error happens when an inadequate candidate is admitted to training or trial employment despite your screening protocol. This candidate will be costly to train and will represent an increased risk in later operations. Type 1 errors (also called “false positives”) are those you want to reduce to a minimum, and you want to find out why they happen. They are the primary target of your in-house validation program. The more frequent Type 2 error happens when a candidates who would be successful in your operation is rejected by your selection process. Although such rejections
