Title: Toward inclusive theories of the evolution of musicality
Abstract We compare and contrast the 60 commentaries by 109 authors on the pair of target articles by Mehr et al. and ourselves. The commentators largely reject Mehr et al.'s fundamental definition of music and their attempts to refute (1) our social bonding hypothesis, (2) byproduct hypotheses, and (3) sexual selection hypotheses for the evolution of musicality. Instead, the commentators generally support our more inclusive proposal that social bonding and credible signaling mechanisms complement one another in explaining cooperation within and competition between groups in a coevolutionary framework (albeit with some confusion regarding terminologies such as “byproduct” and “exaptation”). We discuss the proposed criticisms and extensions, with a focus on moving beyond adaptation/byproduct dichotomies and toward testing of cross-species, cross-cultural, and other empirical predictions. more »« less
Kasdan, Anna; Gordon, Reyna L.; Lense, Miriam D.
(, Behavioral and Brain Sciences)
null
(Ed.)
Abstract Our commentary addresses how two neurodevelopmental disorders, Williams syndrome and autism spectrum disorder, provide novel insights into the credible signaling and music and social bonding hypotheses presented in the two target articles. We suggest that these neurodevelopmental disorders, characterized by atypical social communication, allow us to test hypotheses about music, social bonding, and their underlying neurobiology.
Johnson, M.; Murthy, D.; Robertson, B. W.; Smith, W. R.; & Stephens, K. K.
(, Proceedings of the ... International ISCRAM Conference)
Global social media use during natural disasters has been well documented (Murthy et al., 2017). In the U.S., public social media platforms are often a primary venue for those affected by disasters . Some disaster victims believe first responders will see their public posts and that the 9-1-1 telephone system becomes overloaded during crises. Moreover, some feel that the accuracy and utility of information on social media is likely higher than traditional media sources . However, sifting through content during a disaster is often difficult due to the high volume of ‘non-relevant’ content. In addition, text is studied more than images posted on Twitter, leaving a potential gap in understanding disaster experiences. Images posted on social media during disasters have a high level of complexity (Murthy et al., 2016). Our study responds to O’Neal et al.’s (2017) call-to-action that social media images posted during disasters should be studied using machine learning.
Winkler, Sasha L.; Perry, Susan E.
(, American Journal of Primatology)
Abstract Many mammalian species display sex differences in the frequency of play behavior, yet the animal literature includes few longitudinal studies of play, which are important for understanding the developmental timing of sex differences and the evolutionary functions of play. We analyzed social play, solitary play, and grooming using an 18‐year data set on 38 wild white‐faced capuchin monkeys (Cebus capucinus) followed since infancy. Rates of each behavior were measured as the proportion of point samples taken during focal follows in which the individual engaged in each behavior. To determine sex differences in these rates, we ran a series of generalized linear mixed models, considering both linear and quadratic effects of age, and chose the optimal model for each of the three behavioral outcomes based on information criteria. Rates of both social play and solitary play decreased with age, with the exception of social play in males, which increased in the early juvenile period before decreasing. Male and female capuchins had different developmental patterns of social play, with males playing more than females during most of the juvenile period, but they did not display meaningful sex differences in solitary play rates. Additionally, males and females had different patterns of grooming over the lifespan: males participated in grooming at low rates throughout their lives, while adult females participated in grooming at much higher rates, peaking around age 11 years before declining. We suggest that male and female white‐faced capuchins may adopt alternative social bonding strategies, including different developmental timing and different behaviors (social play for males vs. grooming for females). Our results were consistent with two functional hypotheses of play, the practice and bonding hypotheses. This study demonstrates that play behavior may be critical for the development of sex‐specific social strategies and emphasizes the importance of developmental perspectives on social behaviors.
Meltzoff, Andrew N.; Murray, Lynne; Simpson, Elizabeth A.; Heimann, Mikael; Nagy, Emese; Nadel, Jacqueline; Pedersen, Eric J.; Brooks, Rechele; Messinger, Daniel S.; De Pascalis, Leonardo; et al
(, Developmental Science)
We (Meltzoff et al., 2018) described how Oostenbroek et al.’s (2016) design likely dampened infant imitation. In their commentary, Oostenbroek et al. (2018) argue that our points are post hoc. It is important for readers to know that they are not. Our paper restated “best practices” described in published papers. Based on the literature, the design used by Oostenbroek et al. (2016) would be predicted to dampen infant imitation. First, Oostenbroek et al.’s (2016) test periods were too brief. The stimulus presentation for each type of gesture was too short to ensure that neonates saw the display. The response measurement period did not allow neonates sufficient time to organize a motor response. Meltzoff and Moore (1983a, 1994) introduced experimental procedures specifically designed to address these issues (also, Simpson, Murray, Paukner, & Ferrari, 2014). Oostenbroek et al. did not capitalize on these procedural advances. Second, Oostenbroek et al. allowed uncontrolled experimenter–infant interactions during the test session itself. Previous papers on imitation provided analyses of how uncontrolled interactions with the experimenter can introduce “noise” in experiments of facial imitation (Meltzoff & Moore, 1983b, 1994). Third, Oostenbroek et al. used suboptimal eliciting conditions. Neonates cannot support their own heads; in Oostenbroek et al., infants’ heads were allowed to flop from side-to-side unsupported on the experimenter’s lap while the experimenter gestured with both hands. In addition, papers have listed techniques for maximizing visual attention (controlled lighting, homogeneous background) (Meltzoff & Moore, 1989, 1994). Oostenbroek et al. tested infants on a couch in the home. Despite a design that would blunt imitation, our reanalysis of Oostenbroek et al.’s data showed a response pattern that is consistent with the imitation of tongue protrusion (TP). In their commentary, Oostenbroek et al. (2018) now propose limiting analyses to a subset of their original controls. We reanalyzed their data accordingly. Again, the results support early imitation. Their cross-sectional data (Oostenbroek et al., 2016, Table S4) collapsed across age show significantly more infant TP in response to the TP demonstration than to the mean of the six dynamic face controls (mouth, happy, sad, mmm, ee, and click): t(104) = 4.62, p = 0.00001. The results are also significant using a narrower subset of stimuli (mouth, happy, and sad): t(104) = 3.20, p = 0.0018. These results rule out arousal, because the adult TP demonstration was significantly more effective in eliciting infant tongue protrusions than the category of dynamic face controls. Tongue protrusion matching is a robust phenomenon successfully elicited in more than two dozen studies (reviews: Meltzoff & Moore, 1997; Nagy, Pilling, Orvos, & Molnar, 2013; Simpson et al., 2014). There are more general lessons to be drawn. Psychology is experiencing what some call a “replication crisis.” Those who attempt to reproduce effects have scientific responsibilities, as do original authors. Both can help psychology become a more cumulative science. It is crucial for investigators to label whether or not a study is a direct replication attempt. If it is not a direct replication, procedural alterations and associated limitations should be discussed. It sows confusion to use procedures that are already predicted to dampen effects, without alerting readers. Psychology will be advanced by more stringent standards for reporting and evaluating studies aimed at reproducing published effects. Infant imitation is a fundamental skill prior to language and contributes to the development of social cognition. On this both Oostenbroek et al. and we agree.
Kiene, Charles; Hill, Benjamin Mako
(, CHI EA '20: Extended Abstracts of the 2020 CHI Conference on Human Factors in Computing Systems)
null
(Ed.)
Adopting new technology is challenging for volunteer moderation teams of online communities. Challenges are aggravated when communities increase in size. In a prior qualitative study, Kiene et al. found evidence that moderator teams adapted to challenges by relying on their experience in other technological platforms to guide the creation and adoption of innovative custom moderation "bots." In this study, we test three hypotheses on the social correlates of user innovated bot usage drawn from a previous qualitative study. We find strong evidence of the proposed relationship between community size and the use of user innovated bots. Although previous work suggests that smaller teams of moderators will be more likely to use these bots and that users with experience moderating in the previous platform will be more likely to do so, we find little evidence in support of either proposition.
Savage, Patrick E., Loui, Psyche, Tarr, Bronwyn, Schachner, Adena, Glowacki, Luke, Mithen, Steven, and Fitch, W. Tecumseh. Toward inclusive theories of the evolution of musicality. Retrieved from https://par.nsf.gov/biblio/10333130. Behavioral and Brain Sciences 44. Web. doi:10.1017/S0140525X21000042.
Savage, Patrick E., Loui, Psyche, Tarr, Bronwyn, Schachner, Adena, Glowacki, Luke, Mithen, Steven, & Fitch, W. Tecumseh. Toward inclusive theories of the evolution of musicality. Behavioral and Brain Sciences, 44 (). Retrieved from https://par.nsf.gov/biblio/10333130. https://doi.org/10.1017/S0140525X21000042
Savage, Patrick E., Loui, Psyche, Tarr, Bronwyn, Schachner, Adena, Glowacki, Luke, Mithen, Steven, and Fitch, W. Tecumseh.
"Toward inclusive theories of the evolution of musicality". Behavioral and Brain Sciences 44 (). Country unknown/Code not available. https://doi.org/10.1017/S0140525X21000042.https://par.nsf.gov/biblio/10333130.
@article{osti_10333130,
place = {Country unknown/Code not available},
title = {Toward inclusive theories of the evolution of musicality},
url = {https://par.nsf.gov/biblio/10333130},
DOI = {10.1017/S0140525X21000042},
abstractNote = {Abstract We compare and contrast the 60 commentaries by 109 authors on the pair of target articles by Mehr et al. and ourselves. The commentators largely reject Mehr et al.'s fundamental definition of music and their attempts to refute (1) our social bonding hypothesis, (2) byproduct hypotheses, and (3) sexual selection hypotheses for the evolution of musicality. Instead, the commentators generally support our more inclusive proposal that social bonding and credible signaling mechanisms complement one another in explaining cooperation within and competition between groups in a coevolutionary framework (albeit with some confusion regarding terminologies such as “byproduct” and “exaptation”). We discuss the proposed criticisms and extensions, with a focus on moving beyond adaptation/byproduct dichotomies and toward testing of cross-species, cross-cultural, and other empirical predictions.},
journal = {Behavioral and Brain Sciences},
volume = {44},
author = {Savage, Patrick E. and Loui, Psyche and Tarr, Bronwyn and Schachner, Adena and Glowacki, Luke and Mithen, Steven and Fitch, W. Tecumseh},
}
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