Revisiting the revisit: added evidence for a social chemosignal in human emotional tears

In a study by Gelstein et al., we found that human emotional tears act as a social chemosignal. In the first of three different experiments in that study we observed that sniffing women’s emotional tears reduced the sexual attractiveness attributed by men to pictures of women’s faces. In a study partly titled “Chemosignaling effects of human tears revisited”, Gra?anin et al. claim failed replication of this effect in a series of experiments, one they described as “exactly the same procedure” as Gelstein. Given that Gra?anin et al. refused our extended offer to jointly replicate the experiment at our expense, we can merely comment on their effort. We find that Gra?anin, who are not a chemosignaling laboratory, used methodology that falls short of standards typically applied in chemosignaling research. Thus, their experiments were profoundly different from Gelstein. Finally, we found that in reanalysing their raw data we could in fact replicate the effect from Gelstein. Thus, we conclude that the failed replication in Gra?anin is neither a replication nor failed.     

What Determines Visual Statistical Learning Performance? Insights From Information Theory

In order to extract the regularities underlying a continuous sensory input, the individual elements constituting the stream have to be encoded and their transitional probabilities (TPs) should be learned. This suggests that variance in statistical learning (SL) performance reflects efficiency in encoding representations as well as efficiency in detecting their statistical properties. These processes have been taken to be independent and temporally modular, where first, elements in the stream are encoded into internal representations, and then the co‐occurrences between them are computed and registered. Here, we entertain a novel hypothesis that one unifying construct—the rate of information in the sensory input—explains learning performance. This theoretical approach merges processes related to encoding of events and those related to learning their regularities into a single computational principle. We present data from two large‐scale experiments with over 800 participants tested in support for this hypothesis, showing that rate of information in a visual stream clearly predicts SL performance, and that similar rate of information values leads to similar SL performance. We discuss the implications for SL theory and its relation to regularity learning.     

Synaesthesia: the prevalence of atypical cross-modal experiences

Sensory and cognitive mechanisms allow stimuli to be perceived with properties relating to sight, sound, touch, etc, and ensure, for example, that visual properties are perceived as visual experiences, rather than sounds, tastes, smells, etc. Theories of normal development can be informed by cases where this modularity breaks down, in a condition known as synaesthesia. Conventional wisdom has held that this occurs extremely rarely (0.05% of births) and affects women more than men. Here we present the first test of synaesthesia prevalence with sampling that does not rely on self-referral, and which uses objective tests to establish genuineness. We show that (a) the prevalence of synaesthesia is 88 times higher than previously assumed, (b) the most common variant is coloured days, (c) the most studied variant (grapheme-colour synaesthesia)--previously believed most common--is prevalent at 1%, and (d) there is no strong asymmetry in the distribution of synaesthesia across the sexes. Hence, we suggest that female biases reported earlier likely arose from (or were exaggerated by) sex differences in self-disclosure.     

What-where-when memory in pigeons

The authors report a novel approach to testing episodic-like memory for single events. Pigeons were trained in separate sessions to match the identity of a sample on a touch screen, to match its location, and to report on the length of the retention interval. When these 3 tasks were mixed randomly within sessions, birds were more than 80% correct on each task. However, performance on 2 different tests in succession after each sample was not consistent with an integrated memory for sample location, time, and identity. Experiment 2 tested binding of location and identity memories in 2 different ways. The results were again consistent with independent feature memories. Implications for tests of episodic-like memory are discussed.     

Learning about environmental geometry: an associative model

K. Cheng (1986) suggested that learning the geometry of enclosing surfaces takes place in a geometric module blind to other spatial information. Failures to find blocking or overshadowing of geometry learning by features near a goal seem consistent with this view. The authors present an operant model in which learning spatial features competes with geometry learning, as in the Rescorla-Wagner model. Relative total associative strength of cues at a location determines choice of that location and thus the frequencies of reward paired with each cue. The model shows how competitive learning of local features and geometry can appear to result in potentiation, blocking, or independence, depending on enclosure shape and kind of features. The model reproduces numerous findings from dry arenas and water mazes.     

Cyberbullying in a diverse society: comparing Jewish and Arab adolescents in Israel through the lenses of individualistic versus collectivist cultures

The purpose of this study was to examine the differences in cyberbullying (bystanders, victims, bullies) between Jewish and Arab adolescents in Israel. The findings could uncover critical implications for children, educators, and policymakers for understanding Cyberbullying in a diverse society. In particular, the differences in cyberbullying between collective and individualistic societies and the effect of gender bias on the likelihood of engaging in cyberbullying. Two cultural contexts in Israel were explored: one representing a collectivist orientation (Arab-Muslim and Arab-Christian culture), the other representing a more individualistic orientation (Jewish culture). The study included 901 junior high and high school students (501 Jewish-Israelis and 400 Arab–Israelis), which filled in an online cyberbullying survey. Findings revealed that Jewish adolescents reported being cybervictims and cyberbystanders more than Arab adolescents, yet contrary to expectation, Arab adolescents reported being cyberbullies more than Jewish adolescents. Contrary to expectation, no gender differences in being a bully were found among Jewish adolescents, while among Arab adolescents, girls reported higher bullying than boys. The cultural difference was significant among girls, revealing that Jewish girls were higher than Arab girls on bystanding and victimization, yet Arab girls were higher than Jewish girls on bullying in cyberspace. The cultural difference was not significant among boys. Using online communication as a theoretical framework, this study observed aspects of cyberbullying in the diverse and multicultural society of Israel through the lenses of individualistic versus collectivist cultures. The findings and their implications are further discussed and shed more light on cyberbullying in a diverse and multicultural society.     

Watch this! Observed tool use affects perceived distance

Recent research has shown that being able to interact with an object causes it to be perceived as being closer than objects that cannot be interacted with. In the present study, we examined whether that compression of perceived space would be experienced by people who simply observed such interactions by others with no intention of performing the action themselves. Participants judged the distance to targets after observing an actor reach to an otherwise unreachable target with a tool (Experiment 1) or illuminate a distant target with a laser pointer (Experiment 2). Observing either type of interaction caused a compression of perceived space, revealing that a person’s perception of space can be altered through mere observation. These results indicate that shared representations between an actor and observer are engaged at the perceptual level easily and perhaps automatically, even in the absence of cooperation or an observer’s own intention to interact.     

Transposed-letter priming effect in Hebrew in the same-different task

We investigated the interaction between morphological structure and transposed-letter priming using the same-different task with Hebrew, a Semitic language in which morphology has been shown to play a key role in visual word recognition. In contrast to the results observed with lexical decision (e.g., Velan & Frost, 2009, 2011), a transposed-letter priming effect was observed irrespective of the morphological structure of the words. We take these results to suggest that morphological decomposition occurs only in the service of lexical access. We discuss further a unique feature of written Arabic, another Semitic language, to explain the apparent conflict between our findings and those reported by Perea, Abu Mallouh, García-Orza, and Carreiras (2010).     

The Role of Career Aspiration,Self-Esteem,Body Esteem,and Gender in Predicting Sense of Well-being Among Emerging Adults

During emerging adulthood, one’s sense of well-being undergoes many rapid changes. Although emerging adults often present considerable energy, creativity, and hopefulness, both in higher education classrooms and workplaces, they often experience a decrease in well-being due to experience confusion, stress encounters, and difficulties in transitioning to adulthood. The authors examined four noteworthy key socioemotional factors that may be linked to emerging adults' sense of well-being: career aspiration, self-esteem, body esteem, and gender. Three hundred 20- to 29-year-old university students participated in the study. Results showed that well-being was correlated positively with self-esteem and body esteem, and body esteem was correlated negatively with gender (men scored higher). Regression analyses revealed that for both men and women, self-esteem and body esteem predicted well-being. Nevertheless, when the gender was analyzed separately, career aspiration predicted well-being only for men, whereas body esteem predicted well-being only for women. The study findings illuminates the importance of generating preventive measures in childhood and adolescence, through reinforcing skills such as resilience and self-esteem with the aim of passing through emerging adulthood with as little harm as possible to the sense of well-being.