Anthropomorphism is a widespread phenomenon in which people instil non-human entities or objects with human-like characteristics, such as motivations, intentions, and goals. Although common, the tendency to anthropomorphise varies between people, and a growing body of psychological research has examined the importance of various individual differences. One major theoretical account of anthropomorphism (Epley et al. 2007) suggests that sociality motivation – the drive to establish social relationships – is a key moderator of the phenomenon. In support of this account, some evidence suggests that people who experience greater loneliness (a proposed marker of sociality motivation) are more likely to anthropomorphise. In an influential series of studies, Epley et al. (2008) found that anthropomorphism and loneliness were positively correlated and that inducing participants experimentally to feel more lonely led to greater anthropomorphism. Later studies, however, produced more mixed results, particularly concerning the effectiveness of the experimental interventions.

 

In the current study, Elsherif et al. (2024) undertook a partial replication of Epley et al. (2008), focusing on the correlational relationship between anthropomorphism and loneliness, with extensions to examine free will beliefs, anthropomorphism for supernatural beings (in addition to objects/gadgets), and the extent to which participants judged objects/gadgets to be controllable. The results revealed no reliable evidence for a positive relationship between anthropomorphism and loneliness. Analyses of the extended questions revealed that the perceived controllability of gadgets was associated negatively with anthropomorphism and that free will belief was associated positively with belief in anthropomorphism of supernatural beings. Broadly, the current findings constitute a non-replication of Epley et al. (2008). The authors conclude by calling for more direct and conceptual replications to establish the link (if any) between sociality motivation and anthropomorphism.

 

The Stage 2 manuscript was evaluated over one round of in-depth review. Based on detailed responses to the reviewer's and recommender's comments, the recommender judged that the manuscript met the Stage 2 criteria and awarded a positive recommendation.
 
URL to the preregistered Stage 1 protocol: https://osf.io/by89c

 

Level of bias control achieved: Level 6. No part of the data or evidence that was used to answer the research question was generated until after IPA. 
 
List of eligible PCI RR-friendly journals:

 

 

1. Epley, N., Waytz, A., & Cacioppo, J. T. (2007). On seeing human: A three-factor theory of anthropomorphism. Psychological Review, 114, 864–886. https://doi.org/10.1037/0033-295X.114.4.864 

 

2. Epley, N., Akalis, S., Waytz, A., & Cacioppo, J. T. (2008). Creating social connection through inferential reproduction: Loneliness and perceived agency in gadgets, Gods, and greyhounds. Psychological Science, 19, 114–120. https://doi.org/10.1111/j.1467-9280.2008.02056.x 

 

3. Elsherif, M., Pomareda, C., Xiao, Q., Chu, H. Y., Tang, M. C., Wong, T. H., Wu, Y. &  Feldman, G. (2024). Insufficient evidence of a positive association between chronic loneliness and anthropomorphism: Replication and extension Registered Report of Epley et al. (2008) [Stage 2]. Acceptance of Version 6 by Peer Community in Registered Reports. https://osf.io/x96kn

Beyond the semantics communicated by speech, human vocalisations can convey a wealth of non-verbal information, including the speaker’s identity, body size, shape, health, age, intentions, emotional state, and personality characteristics. While much has been studied about the neurocognitive basis of voice processing and perception, the richness of vocalisations leaves open fundamental questions about the aesthetics of (and across) song and speech, including which factors determine our preference (liking) for different vocal styles.

 

In the current study, Bruder et al. (2024) examined the characteristics that determine the enjoyment of voices in different contexts and the extent to which these preferences are shared across different types of vocalisation. Sixty-two participants reported their degree of liking across a validated stimulus set of naturalistic and controlled vocal performances by female singers performing different melody excerpts as a lullaby, as a pop song and as opera aria, as well as reading the corresponding lyrics aloud as if speaking to an adult audience or to an infant. The authors then asked two main questions: first if there is a difference in the amount of shared taste (interrater agreement) across contrasting vocal styles, and second, as suggested by sexual selection accounts of voice attractiveness, whether the same performers are preferred across styles.

 

Support for the preregistered hypotheses was mixed. Shared taste differed significantly between singing styles, but contrary to the hypothesis that it would be higher for more “natural”/ universal styles (lullabies) than for more “artificial” (operatic) forms of singing (with pop singing in an intermediary position), it was found to be higher for operatic than pop singing. At the same time, the hypothesis of low consistency in preferences for singers across styles was confirmed, contradicting the notion that singing and speaking voices convey the same information about an individual's physical fitness. Overall, the results suggest that enjoyment of singing and speaking is idiosynchratic and prone to substantial individual differences. The authors conclude that a broader approach is needed to studying this question that traverses geographic, linguistic, and cultural contexts.

The Stage 2 manuscript was evaluated over one round of in-depth review. Based on detailed responses to the reviewer's comments, the recommender judged that the manuscript met the Stage 2 criteria and awarded a positive recommendation.
 
URL to the preregistered Stage 1 protocol: https://osf.io/7dvme
 
Level of bias control achieved: Level 6. No part of the data or evidence that was used to answer the research question was generated until after IPA. 
 
List of eligible PCI RR-friendly journals:

 

References
 
1. Bruder, C., Frieler, K. and Larrouy-Maestri, P. (2024). Appreciation of singing and speaking voices is highly idiosyncratic [Stage 2]. Acceptance of Version 2 by Peer Community in Registered Reports. https://osf.io/rp5jx?view_only=506d243a6e7a4d3680c81e696ca81025

Note from the PCI RR Managing Board: This Stage 1 recommendation was originally written by Esther Sebastián González for PCI Ecology on 06 Oct 2020 and was transferred to PCI Registered Reports on 14 Jan 2025 to facilitate the submission and evaluation of the resulting Stage 2 submissions. The link to the original recommendation and review history at PCI Ecology may be found at this link (and in PDF format here).

 

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Understanding the relative importance of species-specific traits and environmental factors in modulating species distributions is an intriguing question in ecology [1]. Both behavioral flexibility (i.e., the ability to change the behavior in changing circumstances) and habitat availability are known to influence the ability of a species to expand its geographic range [2,3]. However, the role of each factor is context and species dependent and more information is needed to understand how these two factors interact. In this pre-registration, Logan et al. [4] explain how they will use Great-tailed grackles (Quiscalus mexicanus), a species with a flexible behavior and a rapid geographic range expansion, to evaluate the relative role of habitat and behavior as drivers of the species’ expansion [4]. The authors present very clear hypotheses, predicted results and also include alternative predictions. The rationales for all the hypotheses are clearly stated, and the methodology (data and analyses plans) are described with detail. The large amount of information already collected by the authors for the studied species during previous projects warrants the success of this study. It is also remarkable that the authors will make all their data available in a public repository, and that the pre-registration in already stored in GitHub, supporting open access and reproducible science. I agree with the three reviewers of this pre-registration about its value and I think its quality has largely improved during the review process. Thus, I am happy to recommend it and I am looking forward to seeing the results.

 

 

Level of bias control achieved: Level 1. At least some of the data/evidence that will be used to the answer the research question has been accessed and observed by the authors, including key variables, but the authors certify that they have not yet performed any of their preregistered analyses, and in addition they have taken stringent steps to reduce the risk of bias.
 
List of eligible PCI-RR-friendly journals:
 

 

 

[1] Gaston KJ. 2003. The structure and dynamics of geographic ranges. Oxford series in Ecology and Evolution. Oxford University Press, New York.

 

[2] Sol D, Lefebvre L. 2000. Behavioural flexibility predicts invasion success in birds introduced to new zealand. Oikos. 90(3): 599–605. https://doi.org/10.1034/j.1600-0706.2000.900317.x

 

[3] Hanski I, Gilpin M. 1991. Metapopulation dynamics: Brief history and conceptual domain. Biological journal of the Linnean Society. 42(1-2): 3–16. https://doi.org/10.1111/j.1095-8312.1991.tb00548.x

 

[4] Logan CJ, McCune KB, Chen N, Lukas D. 2020. Implementing a rapid geographic range expansion - the role of behavior and habitat changes (http://corinalogan.com/Preregistrations/gxpopbehaviorhabitat.html) In principle acceptance by PCI Ecology of the version on 16 Dec 2021 https://github.com/corinalogan/grackles/blob/0fb956040a34986902a384a1d8355de65010effd/Files/Preregistrations/gxpopbehaviorhabitat.Rmd

 

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Full review history: [link]

 

In neurostimulation research, the parameters of a stimulation protocol crucially impact on the effects of the stimulation. Transcranial direct current stimulation (tDCS) is a neurostimulation technique that typically uses current intensities about 1-2 mA in human research to modulate motor and cognitive behavior. The current sham-controlled study by Hsu et al. (2024) applies current intensities not only of 2 mA but also of 4 mA and 6 mA and thus extends our understanding of stimulation parameters while ethical standards are preserved.

 

The influence of tDCS over the primary motor cortex was evaluated for neural plasticity during motor learning. Stimulation effects were tested not only behaviorally but also physiologically by motor evoked potentials elicited by transcranial magnetic stimulation (TMS). The presented pilot data were promising and underlined the feasibility of the proposed research design. The study contributes to tDCS research by uncovering reasons for controversial findings and thus increases reproducibility.

 

The results of the study unexpectedly revealed no stimulation effects on motor learning, neither for behavioral outcomes nor for physiological outcomes by motor evoked potentials. No evidence was found that stimulation effects linearly increase with increasing intensity. Interestingly, higher intensities were relatively well tolerated - but did not have any impact. The current findings underline the purpose of preregistrations and registered reports to act against publication bias, particulary in the field of neuromodulation. In the current case, failed replication and null findings - revealed by a methodologically sound study - are crucial to inform future research using similar stimulation protocols with the aim to modulate motor or cognitive behavior.

 

The Stage 2 manuscript was evaluated over one round of review. Based on ​detailed responses to reviewers’ and the recommender’s comments, the recommender judged that the manuscript met the Stage 2 criteria and awarded a positive recommendation.

 

URL to the preregistered Stage 1 protocol: https://osf.io/jyuev
 
Level of bias control achieved: Level 2. At least some data/evidence that was used to answer the research question had been accessed and partially observed by the authors prior to Stage 1 in-principle acceptance, but the authors certify that they had not yet observed the key variables within the data that were used to answer the research question.
 
List of eligible PCI RR-friendly journals:

 

• Brain and Neuroscience Advances
• Imaging Neuroscience
• NeuroImage: Reports
• Peer Community Journal
• PeerJ
• Royal Society Open Science
• Studia Psychologica

 

 

Hsu, G., Jafari, Z. H., Ahmed, A., Edwards, D. J., Cohen, L. G., & Parra, L. C. (2024). Dose-response of tDCS effects on motor learning and cortical excitability: a preregistered study [Stage 2]. Acceptance of Version 2.1 by Peer Community in Registered Reports. https://osf.io/a42uy

When people are less-well-known to us, it can impact how we treat them. People outside our communities may feel more anonymous or de-personalized to us, and this could impact the empathy we feel for them. Indeed, past research shows that people seem to care more for those who are who are identified to us, especially when they are victims of a crime (Small & Loewenstein, 2003). In addition, past research also shows that anonymizing victims can influence criminal behavior (Walters, 2022).  Thus, social cognitive factors related to anonymity appear to affect both positive feelings (engaging in empathy) and negative activities (criminal activity) related to victims. It seems likely that anonymity can also affect how people judge criminals themselves.

 

This paper by Blanke and Twardawski (2024) examines how even minor identifying features can make individuals react differently to a perpetrator of a crime. A picture or name (information that may appear in the press) may impact how people perceive criminals in terms of punishment, empathy, outrage, and blame.

 

How people respond to anonymous or identified criminals may depend on whether the impact of the crime on the victim is made salient. Similar to the Black Sheep Effect (Marques & Paez,1994), the current paper expects that people who identify with victims are expected to punish a perpetrator more when the perpetrator’s name and image are known. This is similar to the case with an ingroup member in The Black Sheep Effect, where ingroup members are punished more for transgressions than outgroup members. For people who view the situation as a third party (and are thus less connected to the victim), an identified perpetrator is expected to lead to less punishment (and also less outrage and blame, and more empathy).

 

The current study focuses on pickpocketing since it is a crime that can be committed without identifying oneself to the victim. Future research should examine how the type of event impacts judgments, especially given the stigma of being a victim of some crimes. Littering and other minor violations may be seen as understandable when you see someone as a person, rather than a anonymous, impersonal criminal.  On the other hand, there can be stigma to being a victim in some cases, such as the case of sexual harassment, where, research shows, perpetrators are judged more positively if they are identified, and victims, especially women, are judged more negatively if they are identified (Barak-Corren & Lewinsohn-Zamir, 2019).

 

People around the world engage in moral and legal transgressions, and if our judgments of them are influenced by minor features such as a photo or name, we should take action to treat people more fairly. This research will help to determine if people are influenced by these factors.

 

The Stage 1 manuscript underwent one round of thorough review. After considering the detailed responses to the reviewers' comments, the recommender determined that the manuscript met the Stage 1 criteria and granted in-principle acceptance (IPA).

 

 
Level of bias control achieved: Level 6. No part of the data or evidence that will be used to answer the research question yet exists and no part will be generated until after IPA.
 
List of eligible PCI RR-friendly Journals:
 

 

 

1. Barak‐Corren, N., & Lewinsohn‐Zamir, D. (2019). What's in a Name? The Disparate Effects of Identifiability on Offenders and Victims of Sexual Harassment. Journal of Empirical Legal Studies, 16, 955-1000. https://doi.org/10.1111/jels.12233

 

2. Blanke, T. & Twardawski, M. (2024). The Role of Offender Identifiability in Second- and Third-Party Punishment. In principle acceptance of Version 2 by Peer Community in Registered Reports. https://osf.io/7qzva

 

3. Marques, J. M., & Paez, D. (1994). The ‘black sheep effect’: Social categorization, rejection of ingroup deviates, and perception of group variability. European Review of Social Psychology, 5, 37-68. https://doi.org/10.1080/14792779543000011

 

4. Small, D. A., & Loewenstein, G. (2003). Helping a victim or helping the victim: Altruism and identifiability. Journal of Risk and Uncertainty, 26, 5-16. https://doi.org/10.1023/A:1022299422219

 

5. Walters, G. D. (2022). Crime and social cognition: A meta-analytic review of the developmental roots of adult criminal thinking. Journal of Experimental Criminology, 18, 183-207. https://doi.org/10.1007/s11292-020-09435-w