These results were consistent with the first wave (see Supplementary Information 5), except for the significant positive correlation between pre-game T and C. With regard to behaviors, it appears that students earlier in their academic career were more acquiescent (see Table S2). In addition, we assayed C from first wave samples (ASKA Pharma Medical Co.) and reanalyzed it using GLMM. In the analysis of the longitudinal data, we included the data of the first and second waves. First, we analyzed the data of the second wave alone for comparison with the first wave’s result.
In this model, there was a significant effect of opponent condition between senior and junior opponent conditions. (a) Senior opponent condition, (b) Same-year opponent condition, (c) Junior opponent condition. This is a different result from the first wave, where baseline T and acquiescence were positively correlated among the lower year students. 2, in the junior opponent condition, salivary T showed a significant negative correlation with acquiescence. As a result, the model including only T, opponent condition, and their interaction was adopted as the best model when the junior opponent condition was set as the contrasts (Table S3).
This extensive exploration aims to contribute valuable insights to the field of health psychology, providing a nuanced understanding of the intricate interplay between testosterone imbalances and psychological well-being. Additionally, it elucidates the intricate interplay between testosterone imbalances and psychological disorders, focusing on mood and neurocognitive disorders. Testosterone promotes dominance behaviors in the Ultimatum Game after players’ status increases. Therefore, attention must be paid to these factors when investigating the relationship between hormones and behaviors, especially in abstract situations like economic games. The implications of this research for the study of dominance and status lie in the complexity of achieving or maintaining high status. The comparative study of primates shows that low-status individuals have higher C than high-status individuals in species with higher stress or less social support for low-status individuals41. The relationship between cortisol and real status in real-world social groups in humans is not well understood.
These two chemical agents act antagonistically to testosterone in the manipulation of subcortical emotional activity and the restraining interference of the prefrontal cortex. The amygdala plays a pivotal role in the neuroendocrine network by controlling perception and processing emotions. Locally produced and circulating testosterone coupled with intracellular androgen receptors, reacts with the G protein of the neuron membrane and this activates the amygdala enhancing its emotional sensitivity. In the modern era, investigations are conducted with a higher degree of sensitivity with the aid of neuroimaging technology that permits the scanning of brain activation. Testosterone receptors are expressed in the fetus earlier than the biosynthesis of testosterone which occurs in the seventh to eighth week of pregnancy. The testosterone metabolite androstenediol acting on GABA receptors may be another factor for the action of testosterone. Rapid fluctuations of testosterone are believed to be effected by non-genomic actions, mainly through the G protein of the membrane since the DNA reaction with an androgen receptor takes time (31).
The behavioral indexes of these conditions were treated as missing values. Note that the first years did not experience the junior opponent condition because there were no participants junior to them, and the fourth years did not experience the senior opponent condition because no participants were senior to them. This is because we expected that decisions would be affected by whether the opponent has a higher or lower seniority (status) than the decision-maker, rather than the opponent’s year itself. A lower (especially negative value) acquiescence indicates dominance behavior because such a participant requires more as a responder than they give others as a proposer.
Instead, the interaction between T and status remained significant or marginally significant when we added C as the independent variable. Knight et al.40 discussed the cause of this instability of the dual-hormone hypothesis. Recently, a meta-analysis found that although the T and C interaction effect was significant, its effect size was very small, and the variance of effect sizes was large, and so provided only marginal support for the dual-hormone hypothesis39. Generally MAO was higher and both offer and acquiescence were lower when a participant was in years 3 or 4, or when the opponent was junior to the participant.
Atavistic residues of aggressive behavior prevailing in animal life determined by testosterone remain in man, attenuated and suppressed by familial and social inhibitions, but still manifesting in various intensities and forms from thoughts, anger, verbal aggressiveness, competition, dominance to physical violence. Several field studies have also shown that testosterone levels increase during the aggressive phases of sports games. There is evidence that testosterone levels are higher in individuals with aggressive behavior, such as prisoners who have committed violent crimes. Testosterone plays a significant role in the arousal of these behavioral manifestations in the brain centers involved in aggression and on the development of the muscular system that enables their realization. Holistic approaches may include lifestyle modifications, psychoeducation, behavioral interventions, and psychological support, ensuring a comprehensive strategy that attends to the diverse aspects of an individual’s health.
Set 90-minute Monk Mode blocks daily to build cognitive endurance. Time management isn’t about doing more — it’s about doing what matters, ruthlessly. Discipline doesn’t just live in the mind — it’s also hormonal. Journaling isn’t about poetry — it’s about clarity.