Shiraume Gakuen University

Bosson J.K., Jurek P., Vandello J.A., Kosakowska-Berezecka N., Olech M., Besta T., Bender M., Hoorens V., Becker M., Timur Sevincer A., Best D.L., Safdar S., Włodarczyk A., Zawisza M., Żadkowska M., et. al.

Precarious manhood beliefs portray manhood, relative to womanhood, as a social status that is hard to earn, easy to lose, and proven via public action. Here, we present cross-cultural data on a brief measure of precarious manhood beliefs (the Precarious Manhood Beliefs scale [PMB]) that covaries meaningfully with other cross-culturally validated gender ideologies and with country-level indices of gender equality and human development. Using data from university samples in 62 countries across 13 world regions ( N = 33,417), we demonstrate: (1) the psychometric isomorphism of the PMB (i.e., its comparability in meaning and statistical properties across the individual and country levels); (2) the PMB’s distinctness from, and associations with, ambivalent sexism and ambivalence toward men; and (3) associations of the PMB with nation-level gender equality and human development. Findings are discussed in terms of their statistical and theoretical implications for understanding widely-held beliefs about the precariousness of the male gender role.

Kosakowska-Berezecka N., Bosson J.K., Jurek P., Besta T., Olech M., Vandello J.A., Bender M., Dandy J., Hoorens V., Jasinskaja-Lahti I., Mankowski E., Venäläinen S., Abuhamdeh S., Agyemang C.B., Akbaş G., et. al.

Social role theory posits that binary gender gaps in agency and communion should be larger in less egalitarian countries, reflecting these countries’ more pronounced sex-based power divisions. Conversely, evolutionary and self-construal theorists suggest that gender gaps in agency and communion should be larger in more egalitarian countries, reflecting the greater autonomy support and flexible self-construction processes present in these countries. Using data from 62 countries ( N = 28,640), we examine binary gender gaps in agentic and communal self-views as a function of country-level objective gender equality (the Global Gender Gap Index) and subjective distributions of social power (the Power Distance Index). Findings show that in more egalitarian countries, gender gaps in agency are smaller and gender gaps in communality are larger. These patterns are driven primarily by cross-country differences in men’s self-views and by the Power Distance Index (PDI) more robustly than the Global Gender Gap Index (GGGI). We consider possible causes and implications of these findings.

Matsuda Y., Miyamoto H., Joho R.H., Hensch T.K.

• Kv3.1 potassium channels regulate cortical fast-spiking behavior postnatally. • Visual cortical receptive field properties develop normally in the absence of Kv3.1. • Sensory plasticity is slowed but critical period timing is normal without Kv3.1. • Rate of plasticity reflects Kv3.1 gene dosage controlling prolonged spiking. • Diazepam effectively rescues Kv3.1 deficiency of relevance to mental disorders. Experience-dependent plasticity within visual cortex is controlled by postnatal maturation of inhibitory circuits, which are both morphologically diverse and precisely connected. Gene-targeted disruption of the voltage-dependent potassium channel K v 3.1 broadens action potentials and reduces net inhibitory function of parvalbumin (PV)-positive GABA subtypes within the neocortex. In mice lacking K v 3.1, the rate of input loss from an eye deprived of vision was slowed two-fold, despite otherwise normal critical period timecourse and receptive field properties. Rapid ocular dominance plasticity was restored by local or systemic enhancement of GABAergic transmission with acute benzodiazepine infusion. Diazepam instead exacerbated a global suppression of slow-wave oscillations during sleep described previously in these mutant mice, which therefore did not account for the rescued plasticity. Rapid ocular dominance shifts closely reflected K v 3.1 gene dosage that prevented prolonged spike discharge of their target pyramidal cells in vivo or the spike amplitude decrement of fast-spiking cells during bouts of high-frequency firing in vitro . Late postnatal expression of this unique channel in fast-spiking interneurons thus subtly regulates the speed of critical period plasticity with implications for mental illnesses.

Negayama K., Delafield-Butt J.T., Momose K., Ishijima K., Kawahara N.

Feeding involves communication between mothers and infants and requires precise synchrony in a special triadic relationship with the food. It is deeply related to their intersubjectivity. This study compared the development of mother–infant intersubjectivity through interactional synchrony in feeding between 11 Japanese and 10 Scottish mother–infant dyads, observed at 6 and 9 months by video. Japanese mothers were more deliberate in feeding at an earlier age, whereas Scottish mothers were significantly more coercive than Japanese mothers at an earlier age. Japanese mothers brought the spoon to infants with a pause to adjust the timing of insertion to match their infants’ readiness, whereas this pause was not observed in Scottish mothers. Isomorphic mouth opening between mothers and infants was observed. This empathic maternal display is an important element of intersubjectivity in infant feeding that differed between Scottish and Japanese mothers. Scottish mothers’ mouth opening always followed their infants’ mouth opening, but about half of Japanese mothers preceded their infants. Further, the mouths of Scottish infants and mothers opened almost at the same time as spoon insertion. In contrast, Japanese mothers’ mouth opening did not co-occur with the insertion but was close to spoon arrival, a subtle but important difference that allows for greater infant autonomy. The time structure of Scottish mother-infant interactions was simpler and more predictable at 9 months than in Japan, where the structure was more variable, likely due to a stronger regulation by Scottish mothers. In conclusion, Scottish mother-infant intersubjectivity is characterized as more maternally reactive and mother-centered, whereas Japanese mother-infant intersubjectivity is characterized as more maternally empathetic and infant-centered. Cultural differences in intersubjectivity during feeding between Japan and Scotland are further discussed in relation to triadic relationships and parenting styles.

Obokata A., Pauen S.

Today, adolescents can easily make contact with strangers online. The present study examines the relation of online communication with strangers (OCS) and mild delinquency among junior high school students and explores which risk factors are associated with both types of behavior, taking gender differences into account. A total of 1873 Japanese adolescents (aged 12–15) with mobile phones completed online questionnaires assessing internet usage (duration, variability), parental behavior (violence, monitoring), and adolescent characteristics (depression, self-control) as potential predictors of OCS and mild delinquency. Sequential model testing revealed that the duration of internet usage was associated with both dependent variables, whereas its variability was associated with OCS alone. Self-control and parental violence predicted both outcome variables in girls, but only mild delinquency in boys. Depression was related with both behaviors in boys. Parental monitoring was negatively associated with OCS among girls and with mild delinquency among boys. Overall, OCS appeared to have a similar function for girls as mild delinquency did for boys. Implications for future studies and preventive programs will be discussed.

Watanabe M., Kato M., Matsuda Y., Taniguchi K., Itakura S.

AbstractFear of doctors is a common source of distress among infants; however, the underlying sources of this distress are unknown. To investigate the doctor-infant relationship, the behaviors of 61 healthy infants (176–617 days old) were observed in a simulated examination room. Their behaviors and electrocardiograms were recorded. Two groups of infants were analyzed: those who cried and those who did not. When an experimenter dressed in the doctor’s attire entered the room, all 9 infants who were crying (14.8% of all infants) stopped crying, all infants gazed at the experimenter, and their mean heart rate (HR) decreased. After the auscultation started, 29.5% of all infants cried, and the HRs of infants who cried were higher than those of infants who did not cry. During the auscultation, 80.0% of infants who cried averted from the experimenter, while 34.4% of infants who did not cry. Within 5 s of gazing at the stethoscope, the number of infants who cried increased from 3 to 12, and their mean HR also increased. Our findings suggest that the fear of doctors is not due to the appearance of doctors but rather to specific actions performed by doctors, such as auscultation. Infants may regard a doctor’s appearance as a source of interest. Furthermore, a stethoscope is a possible trigger for infants’ crying. These behavioral observations suggest the potential for patient-centered care for infants.