An Experimental Examination of the Effects of Sex and Masculinity/Femininity on Psychological, Physiological, and Behavioral Responses During Communication Situations

The purpose of this study was to examine the effects of biological sex and masculinity/femininity on physiological (blink and heart rates), emotional (anxiety and mood), and behavioral responses (behavioral ratings of communication skills) during communication situations. Participants were 46 students in a Japanese university. They were categorized into 3 gender types—androgynous, stereotypical, and cross-gender on the Masculinity–Humanity–Femininity Scale (Ito, 1978) and the Social Skills Inventory (Riggio, 1986). The communication situations consisted of 2 experimental tasks (question-asking and self-introduction in front of a video camera). These two tasks were conducted in both Japanese and English. The results suggested that the cross-gender-type participants (feminine men and masculine women) showed increased blink and heart rates. For the behavioral ratings, the cross-gender type and the androgynous gender type were judged to have better communication skills than the stereotypical gender type. There was no significant difference in emotional responses among groups. The interaction of biological sex and masculinity/femininity may be associated with interpersonal adjustment and its stress responses.     

Sex differences in preferences for coffee sweetness among Japanese students

The purpose of the present study was to examine sex differences in preferences for coffee sweetness. The participants were 59 Japanese undergraduate students. Men preferred sweeter coffee than women, while both men and women showed almost the same preference for acidic beverage sweetness. The sex difference in preferences for coffee sweetness may be related to coffee-drinking habits.     

A reduction rule for Peirce formula

A reduction rule is introduced as a transformation of proof figures in implicational classical logic. Proof figures are represented as typed terms in a -calculus with a new constant P ⁽⁽⁾⁾. It is shown that all terms with the same type are equivalent with respect to -reduction augmented by this P-reduction rule. Hence all the proofs of the same implicational formula are equivalent. It is also shown that strong normalization fails for P-reduction. Weak normalization is shown for P-reduction with another reduction rule which simplifies of (( ) ) into an atomic type.This work was partially supported by a Grant-in-Aid for General Scientific Research No. 05680276 of the Ministry of Education, Science and Culture, Japan and by Japan Society for the Promotion of Science. Hiroakira Ono     

Slow movement execution in event-related potentials (P300)

We examined whether slow movement execution has an effect on cognitive and information processing by measuring the P300 component. 8 subjects performed a continuous slow forearm rotational movement using 2 task speeds. Slow (a 30-50% decrease from the subject's Preferred speed) and Very Slow (a 60-80% decrease). The mean coefficient of variation for rotation speed under Very Slow was higher than that under Slow, showing that the subjects found it difficult to perform the Very Slow task smoothly. The EEG score of alpha-1 (8-10 Hz) under Slow Condition was increased significantly more than under the Preferred Condition; however, the increase under Very Slow was small when compared with Preferred. After performing the task. P300 latency under Very Slow increased significantly as compared to that at pretask. Further, P300 amplitude decreased tinder both speed conditions when compared to that at pretask, and a significant decrease was seen under the Slow Condition at Fz, whereas the decrease under the Very Slow Condition was small. These differences indicated that a more complicated neural composition and an increase in subjects' attention might have been involved when the task was performed under the Very Slow Condition. We concluded that slow movement execution may have an influence on cognitive function and may depend on the percentage of decrease from the Preferred speed of the individual.     

Effects of lavender aroma on sleep quality in healthy Japanese students

This single-blind randomized study investigated the effectiveness of lavender aroma on quality of sleep in healthy Japanese students. The data of seven participants (2 men, 5 women) in the intervention group and eight participants (3 men, 5 women) in the control group were analyzed (M age = 19.0 yr., SD = 0.9). The total procedure comprised 3 days for pre-intervention assessment, 5 days for the intervention, and 3 days for post-intervention assessment. Lavender exposure was compared with the absence of lavender (control). Information regarding the relaxing effect of aromas was provided to examine expectancy effects. Results showed that lavender aroma improved sleepiness at awakening after the intervention. Sex differences and daily variation in quality of sleep during the intervention period were not observed. The findings suggest that nighttime exposure to lavender aroma relieves sleepiness at awakening.     

Premenstrual Symptoms in Young Japanese Women: Agency, Communion and Lifestyle Habits

This study aimed to examine associations between the traits of agency and communion and the severity of premenstrual symptoms in young Japanese women, considering lifestyle habits. The participants were 512 Japanese female undergraduate students in the Kansai area (mean age?=?18.5?years, SD?=?.9). The participants were assigned a self-administered questionnaire. Multiple regression analyses showed that higher levels in unmitigated agency were positively associated with total scores of premenstrual symptoms, as well as subscales of concentration, behavioral change, water retention, negative affect and arousal. Higher levels in communion were also positively associated with water retention. However, these associations were attenuated when lifestyle habits were taken into account, except for communion, which remained positively associated with water retention. A psychological approach for gender-related traits could be effective in treating premenstrual symptoms.     

An Examination of Sex and Masculinity/Femininity as Related to the Taste Sensitivity of Japanese Students

The purpose of the present study was to examine the influences of gender differences and masculinity–femininity on taste thresholds and food preferences. The participants were 108 Japanese undergraduate students (44 men and 64 women); their mean age was 19.6 years (SD = 1.3). Their detection and recognition thresholds for caffeine and sucrose were measured. Multiple regression analyses showed that women tended to have a lower detection threshold for caffeine than men did. The recognition threshold for caffeine was positively associated with scores for masculinity. For men, masculinity may be associated with smoking and drinking behavior, thereby resulting in a lower sensitivity for bitterness. Masculinity and femininity related to food preferences are also discussed.     

An Examination of the Effects of Stress Management Training for Japanese College Students of Social Work

The purpose of the present study was to examine the effects of a stress-management program for college students of social work on their perception of mental stress and stress-coping strategies. Students in a stress-management group received progressive muscle training, cognitive-behavioral skills training, and assertion training for 14 weeks. Their life events, stress symptoms, and stress-coping skills (active and passive coping skills), evaluated on the first and last days of program, were compared with those of a control group. The effect of the participants' trait anxiety on those variables was also examined. Because the stress-management program in the present study focused on coping strategies, it was expected that the students' coping skills would change. The results showed that passive coping skills of students in the stress-management group had decreased after the program.     

Comparison of blinking behavior during listening to and speaking in Japanese and English

Blinking behavior during conversation may be different between conditions in listening and responding to questions because sifting attention from external to internal is possibly associated. The purpose of this study was to compare blinking behavior, duration, heart rates, and mental states during the tasks of listening to and responding to questions in Japanese and English. Participants were 67 (35 men and 32 women) undergraduate students. Blink rate while responding to questions in English did not differ from that while responding to questions in Japanese, but blink rate while listening to questions in English was significantly reduced compared to that while listening to Japanese. While anxiety and uneasiness were increased by the English conversation, blink rate and heart rate were decreased. Blinking behavior may be related to thinking and attention.     

Effect of slow movement execution on cognitive function

We investigated the effect of slow paced movement on cognitive function. The task movement was a dual-task performance composed of a continuous forearm rotation for the right hand and a simple reaction task for the left hand. Exp. 1 was designed to compare reaction time during performance at a slow pace to that at medium pace by 14 female undergraduate students. The mean reaction time for the left hand under the Slow Pace was significantly longer than that under the Middle Pace condition (p < .05), which showed that the subjects were required to give more attention to right-hand performance at the slow pace as it was difficult. Exp. 2 examined changes in reaction time when using the left hand that were associated with the learning of a slow paced task while using the right hand. Twenty-three female undergraduate students participated and repeated the task 6 times. The 3 sec. prior to and the 3 sec. after each auditory stimulus were used to establish rotation speed and mean coefficients of variation. The mean coefficients of variation, evaluated as within-subject variability, showed a significantly positive correlation with reaction time at Trials 1 and 6 for prestimulus and Trials 5 and 6 for poststimulus. Over successive trials participants continued performing the primary forearm task at a constant slow pace before and after receiving auditory stimuli, and this progress was related to a decrease in reaction time. Further, the sense of concentration evaluated by the subjects poststimulus was significantly higher than that prestimulus (p < .01). Performance at a constant speed, which was much slower than the ordinary or preferred speed of each subject, may have had a strong effect on their ability to remain conscious of movement execution.