Detection Theory: A User's Guide

By Neil A. Macmillan; C. Douglas Creelman | Go to book overview

Glossary

The number in parentheses following each entry gives the chapter in which the term is introduced. Part I is denoted by I, Appendix 1 by Al, and so on.

2AFC (7). Two-alternative forced-choice.

α (4). Sensitivity measure for Choice Theory.

A′ (area under the ROC) (4). An estimate of the area under the ROC based on a single point in ROC space. A measure of sensitivity.

Ag (minimum area under the ROC) (4). An estimate of the area under the ROC based on more than one point in ROC space. A measure of sensitivity.

Az (3). Area under an SDT ROC (i.e., one that is linear on z coordinates). A measure of sensitivity.

absolute identification (5). A classification experiment in which the number of responses equals the number of stimuli.

absolute judgment (5). Same as absolute identification.

ABX (9). A discrimination design in which three stimuli are presented on each trial, and the observer must decide whether the third matches the first or the second.

accuracy (1,13). (a) Same as sensitivity, (b) In statistics, the degree to which the expected value of an estimator equals the parameter being estimated.

adaptation level theory (5). A theory that states that judgments in identification are relative to a central point, the adaptation level.

adaptive probit estimation (APE) (11). An adaptive procedure that estimates psychometric function slope as well as threshold.

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