AIM In the present study, the P300 component of the emotion-loaded visual event-related potential in response to photographs of babies crying or smiling was measured to evaluate cognitive function in elderly subjects, including those with dementia. METHODS The subjects were 48 elderly people who consulted a memory disorder clinic. The visual event-related potential was measured using oddball ...

The aims of this study were to analyse lip line heights and age effects in an adult male population during spontaneous smiling, speech, and tooth display in the natural rest position and to determine whether lip line height follows a consistent pattern during these different functions. The sample consisted of 122 randomly selected male participants from three age cohorts (20-25 years, 35-40 yea...

Previous studies demonstrated the positive effects of smiling on interpersonal outcomes. The present research examined if enhancing one's smile in a virtual environment could lead to a more positive communication experience. In the current study, participants' facial expressions were tracked and mapped on a digital avatar during a real-time dyadic conversation. The avatar's smile was rendered s...

of a thesis at the University of Miami. Evidence suggests that smiles can function as signals of cooperative intent—by producing a smile, the smiler can expect to receive benefits from perceivers and perceivers can expect a return from smilers. However, this type of signal is seemingly susceptible to the evolution of cheats who smile in the absence of cooperative intent, thereby receiving the b...

OBJECTIVES To investigate the different effects of changes in the occlusal plane, incisors inclination, and maxillary intercanine width on the curvature of the smiling line. MATERIALS Records of 46 subjects (28 females and 18 males, mean age 16.6 ± 4.2 years) with incisor class II division 1 malocclusions were selected. All subjects had four premolar extractions and were treated with preadjus...

Primitive emotional contagion has been proposed to explain why ‘service with a smile’ predicts encounter satisfaction. We provide a comprehensive test of this mechanism by examining mimicry and mood as mediators in service encounters, contrasted with a direct path through perceived service quality. Independent coders recorded the smiling strength of employees and customers at three points in ti...

Smiling while talking can be perceived not only visually but also audibly. Several acoustic-phonetic properties have been found to cue smiling in the acoustic signal. The aim of this study was to validate properties associated with smiled speech using a natural video corpus. The realisations of monophthongs of the same words spoken with and without a visible smile were compared. The results sho...