Metacognition: Using Confidence Ratings for Type 2 and Type 1 ROC Curves

In the past five years there has been a surge of renewed interest in metacognition ( thinking about thinking ). The typical experiment involves a binary judgment followed by a multilevel confidence rating. It is a confusing topic because the rating could be made either on one\u27s confidence in the binary response (standard rating Type 1 ROC) or on one\u27s confidence sorted by whether the response was correct (Type 2 ROC). Both are metacognition. After a few remarks on challenging aspects of the Type 2 approach, I will present some interesting results for Type 1 ROC for both memory and vision research. A new method for displaying ROC curves will be advocated. The new method indicates that higher confidence can sometimes be associated with a higher d\u27