Toe Aung

• Doctor of Philosophy
• Assistant Professor of Psychology at Immaculata University

Pitch is the most perceptually salient acoustic property of the voice and influences perceptions of characteristics related to social power, such as dominance and leadership abilities. Voice pitch is also highly sexually differentiated; men vocalize approximately one octave below women. We consider the evolution of this sex difference, and how this...

Sexual selection appears to have shaped the acoustic signals of diverse species, including humans. Deep, resonant vocalizations in particular may function in attracting mates and/or intimidating same-sex competitors. Evidence for these adaptive functions in human males derives predominantly from perception studies in which vocal acoustic parameters...

Sexual attraction to males or females is perhaps the largest behavioral sex difference across animal species. Experiments in laboratory mammals show that prenatal androgens mediate this sex difference, but ethical considerations preclude such experimentation in humans. Multiple lines of converging correlational evidence are therefore needed to demo...

Vocalizations differ substantially between the sexes in many primates, and low-frequency male vocalizations may be favored by sexual selection because they intimidate rivals and/or attract mates. Sexual dimorphism in fundamental frequency may be more pronounced in species with more intense male mating competition and in those with large group size,...

As the earliest measure of social communication in rodents, ultrasonic vocalizations (USVs) in response to maternal separation are critical in preclinical research on neurodevelopmental disorders (NDDs). While sex differences in both USV production and behavioral outcomes are reported, many studies overlook sex as a biological variable in preclinic...

As the earliest measure of social communication in rodents, ultrasonic vocalizations (USVs) in response to maternal separation are critical in preclinical research on neurodevelopmental disorders (NDDs). While sex differences in both USV production and behavioral outcomes are reported, many studies overlook sex as a biological variable in preclinic...

Fundamental frequency ( f o ) is the most perceptually salient vocal acoustic parameter, yet little is known about how its perceptual influence varies across societies. We examined how f o affects key social perceptions and how socioecological variables modulate these effects in 2,647 adult listeners sampled from 44 locations across 22 nations. Low...

Research on heterosexual mating has demonstrated that acoustic parameters (e.g., pitch) of men’s voices influence their attractiveness to women and appearance of status and formidability to other men. However, little is known about how men’s tendency to clearly articulate their speech influences these important social perceptions. In the current st...

Benenson et al. postulate that human females evolved unique survival adaptations to facilitate maternal and grandmaternal care. This hypothesis is consistent with the broader hypothesis that female phenotypes are more ecologically optimal, but further evidence is needed to make a compelling case that sex differences in self-protection are not prima...

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

We examined sex differences in preferences for sexual variety and novelty to determine whether the Coolidge effect plays a role in human sexuality. In two experimental studies that employed different manipulations, we found converging evidence that men showed a greater preference for variety in potential short-term mates than did women. In the firs...

Human voice pitch is highly sexually dimorphic and eminently quantifiable, making it an ideal phenotype for studying the influence of sexual selection. In both traditional and industrial populations, lower pitch in men predicts mating success, reproductive success, and social status and shapes social perceptions, especially those related to physica...

Acoustic signals function in intrasexual mating competition in a wide variety of species, including humans. The low voice pitch of human males has been proposed to represent an honest signal of formidability. Although voice pitch in men affects perceptions of size and dominance, it is relatively weakly associated with objective measures of formidab...

Previous research suggests that binge drinking among young men serves as a “costly signal” to potential mates, such that the binge drinker is capable of bearing the harmful consequences of alcohol consumption. Here, we propose that binge drinking among young adults is conditionally dependent upon the signaler’s willingness to take risks, which is i...

Previous research suggests that waist-to-hip ratio (WHR), waist-to-stature ratio (WSR), and waist-to-bust ratio (WBR) serve as cues of health and fertility in women, influencing the viewers’ perception of attractiveness. However, it is unclear to what extent these findings can be applied to the perception of female attractiveness in a naturalistic...

Previous research suggests that waist-to-hip ratio (WHR), waist-to-stature ratio (WSR), and waist-to-bust ratio (WBR) serve as cues of health and fertility in women, influencing the viewers’ perception of attractiveness. However, it is unclear to what extent these findings can be applied to the perception of female attractiveness in a naturalistic...

Although the “what is beautiful is good” phenomenon has been examined in animated Disney movies, studies have not investigated what makes a particular Disney princess more beautiful than the others. In our study, we further investigated what makes a particular Disney female character ( n = 20) beautiful by measuring and analyzing their waist-to-hip...

Facial symmetry is an index of developmental stability and shows a positive correlation with attractiveness assessment. However, the appearance of one’s facial symmetry is not always static and may change when there is facial movement while a person is speaking. This study examined whether viewing a dynamic image of a person speaking (where facial...

Several studies have documented women’s evolved psychological preference for mates who provide resources and provisioning, but few have examined specific preferences for what defines “resources” in the modern day. In this study, we examined specific types of modern-day resources women prefer given their age and self-perceived mate value. Specifical...

Despite the fact that alcohol consumption has been strongly linked to negative health outcomes (Rehm, Gmel, Sempos, & Trevisan, 2003), alcohol consumption, including binge drinking, seems to be prevalent and socially acceptable (Guise and Gill, 2007). Although not the only explanation for drinking behaviors, the common practices of drinking, especi...