Brelstaff G J, Brodo L, Bicego M, Grosso E, 2006, "Face-pair scrutiny--subject-type classification" Perception 35 ECVP Abstract Supplement
Face-pair scrutiny--subject-type classification
G J Brelstaff, L Brodo, M Bicego, E Grosso
Forensic, security, and health-care processes defer to human observers when identifying visual differences beyond a certain degree of subtlety. For identikit, or passport-like, controls this typically involves extensive scrutiny of face-pair images. We tested forty-nine naive subjects to examine how they would mark differences seen between face pairs. In each trial, one pair of face images was displayed, side-by-side, for 20 s while the subjects marked where they saw differences by clicking the mouse within the right-hand image. The face pairs were specially selected from the BANCA image archive to best represent a wide variety of degrees of difference. Here, we report only trials involving two face pairs: a very difficult, and a very easy to distinguish face pair. From the result we are, nevertheless, able to classify participants into distinct sets of subject types by a parametric analysis of the temporal and spatial characteristics of each individual's click-trail. A graphical presentation of the analysis and classification is available. Although provisional, this classification might prove useful for assessing candidate scrutinisers for real-world tasks.
These web-based abstracts are provided for ease of seaching and access, but certain aspects (such as as mathematics) may not appear in their optimum form. For the final published version of this abstract, please see
ECVP 2006 Abstract Supplement (complete) size: 2368 Kb