Facial ambiguity and perception: How face-likeness affects breaking time in continuous flash suppression.

Previous studies have elucidated that humans can implicitly process faces faster than they process objects. However, the mechanism through which the brain unconsciously processes ambiguous facial images remains unclear. In our experiment, upright and inverted black-and-white binary face stimuli were presented in a two-alternative forced-choice location discrimination task combined with continuous flash suppression, a technique that suppresses visual stimuli perception using rapidly changing masks.

3D full field strain analysis of polymerization shrinkage in a dental composite.

Objective: The objective of this research was to study the polymerization shrinkage in a dental composite using 3D digital image correlation (DIC).

Methods: Using 2 coupled cameras, digital images were taken of bar-shaped composite (Premise Universal Composite; Kerr) specimens before light curing and after for 10 min. Three-dimensional DIC was used to assess in-plane and out-of-plane deformations associated with polymerization shrinkage.