bims-chumac Biomed News
on Context effects on human mate choice
Issue of 2020‒11‒22
four papers selected by
Jay Dixit

  1. Int J Environ Res Public Health. 2020 Nov 17. pii: E8519. [Epub ahead of print]17(22):
    Menzel C, Dennenmoser F, Reese G.
      Natural environments, compared to urban environments, usually lead to reduced stress and positive body appreciation. We assumed that walks through nature and urban environments affect self- and other-perceived stress and attractiveness levels. Therefore, we collected questionnaire data and took photographs of male participants' faces before and after they took walks. In a second step, female participants rated the photographs. As expected, participants felt more restored and attractive, and less stressed after they walked in nature compared to an urban environment. A significant interaction of environment (nature, urban) and time (pre, post) indicated that the men were rated by the women as being more stressed after the urban walk. Other-rated attractiveness levels, however, were similar for both walks and time points. In sum, we showed that the rather stressful experience of a short-term urban walk mirrors in the face of men and is detectable by women.
    Keywords:  attractiveness; face perception; natural environment; stress; urban environment
  2. Sensors (Basel). 2020 Nov 17. pii: E6572. [Epub ahead of print]20(22):
    Lu H, Yuan G, Zhang J, Liu G.
      Love at first sight is a well-known and interesting phenomenon, and denotes the strong attraction to a person of the opposite sex when first meeting. As far as we know, there are no studies on the changes in physiological signals between the opposite sexes when this phenomenon occurs. Although privacy is involved, knowing how attractive a partner is may be beneficial to building a future relationship in an open society where both men and women accept each other. Therefore, this study adopts the photoplethysmography (PPG) signal acquisition method (already applied in wearable devices) to collect signals that are beneficial for utilizing the results of the analysis. In particular, this study proposes a love pulse signal recognition algorithm based on a PPG signal. First, given the high correlation between the impulse signals of love at first sight and those for physical attractiveness, photos of people with different levels of attractiveness are used to induce real emotions. Then, the PPG signal is analyzed in the time, frequency, and nonlinear domains, respectively, in order to extract its physiological characteristics. Finally, we propose the use of a variety of machine learning techniques (support vector machine (SVM), random forest (RF), linear discriminant analysis (LDA), and extreme gradient enhancement (XGBoost)) for identifying the impulsive states of love, with or without feature selection. The results show that the XGBoost classifier has the highest classification accuracy (71.09%) when using the feature selection.
    Keywords:  PPG; feature selection; impulse of love at first sight; machine learning
  3. Int J Impot Res. 2020 Nov 16.
    Arcos-Romero AI, Expósito-Guerra D, Sierra JC.
      Orgasm and sexual desire are components of the human sexual response. The main objective of this study was to examine the relationship between the sexual desire and dimensions of the subjective orgasm experience. A sample composed of 1161 heterosexual adults, distributed into three age groups (18-34, 35-49, and 50 years old or older), completed a background questionnaire, the Orgasm Rating Scale, and the Sexual Desire Inventory. First, the effect that sex and age have on the subjective orgasm experience was analyzed. Second, correlations between sexual desire and orgasm experience were examined. Also, the predictive capacity that dimensions of sexual desire have on the subjective orgasm experience in the context of sexual relationship was examined. Results showed that age had a significant effect on the intensity of the subjective orgasm experience perceived during sexual relationships with a partner and that this experience decreased as people get older. There was an association between the components of sexual desire and the dimensions of subjective orgasm experience. Furthermore, partner-focused sexual desire contributed in a relevant manner to the subjective orgasm experience. Implications for both research and clinical field are also discussed.
  4. Front Psychol. 2020 ;11 2842
    Snir S, Gavron T, Maor Y, Haim N, Sharabany R.
      This longitudinal study, employing a mixed-methods explanatory design, explored the power of art to express aspects of one's inner world using the joint drawing technique, which allows for observation and treatment of implicit representations of relationships. At Time 1 (T1, 1977-1978), 200 adolescents created a joint drawing with either a good friend or with a classmate who was not a friend and filled out the Intimate Friendship Scale (IFS) in relation to their best friend. In 2014 (T2), 36 women and 21 men from the original cohort completed the IFS with regard to a good friend and with regard to their spouse. The drawings were analyzed qualitatively to define pictorial phenomena that may be indicative of closeness. The analysis was conducted in accordance with the phenomenological approach to art therapy and with the principles of thematic analysis. Fourteen pictorial phenomena were defined, and a scale was constructed to quantitatively evaluate the extent to which each phenomenon was present in the joint drawing. This yielded a closeness score for each drawing. Quantitatively, no correlations were found between intimacy as measured by IFS at T1 and at T2. In contrast, there was a correlation between the degree of closeness in the joint drawing at T1, and the IFS score with the partner in T2, suggesting continuity over the 36-year time span. This correlation was likewise found when examined separately among participants who drew with a friend. The multivariate ANOVA (MANOVA) results showed a marginally significant effect for the interaction between closeness in drawing and drawing with a friend/non-friend - on IFS. An ANOVA showed that the IFS regarding the participant's best friend and their romantic partner at T2 was higher when the closeness in the drawing at T1 was higher. There was also a significant interaction between closeness in the drawings and the participant's IFS score regarding their best friend at T1. The differences between the joint drawing with the close friend and the non-friend are discussed. These findings, from a span of over 36 years, thus contribute to the validity of the IFS and the joint drawing technique when assessing closeness and intimacy.
    Keywords:  closeness; internal representations; intimate friendship; joint drawing; longitudinal study