It's personal
The Scent of Disease: Human Body Odor Contains an Early Chemosensory Cue of Sickness
Mats Olsson et al.
Psychological Science, forthcoming
Abstract:
Observational studies have suggested that with time, some diseases result in a characteristic odor emanating from different sources on the body of a sick individual. Evolutionarily, however, it would be more advantageous if the innate immune response were detectable by healthy individuals as a first line of defense against infection by various pathogens, to optimize avoidance of contagion. We activated the innate immune system in healthy individuals by injecting them with endotoxin (lipopolysaccharide). Within just a few hours, endotoxin-exposed individuals had a more aversive body odor relative to when they were exposed to a placebo. Moreover, this effect was statistically mediated by the individuals’ level of immune activation. This chemosensory detection of the early innate immune response in humans represents the first experimental evidence that disease smells and supports the notion of a “behavioral immune response” that protects healthy individuals from sick ones by altering patterns of interpersonal contact.
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Are You Feeling What I’m Feeling? Emotional Similarity Buffers Stress
Sarah Townsend, Heejung Kim & Batja Mesquita
Social Psychological and Personality Science, forthcoming
Abstract:
We examine the idea that it is beneficial for people in threatening situations to affiliate with others who are experiencing similar, relative to dissimilar, emotions. Pairs of participants waited together and then engaged in a laboratory stressor (i.e., giving a speech). We created an index of each pair’s emotional similarity using participants’ emotional states. We also measured how threatening participants perceived the speech task to be (i.e., whether they had high vs. low dispositional fear of public speaking). We hypothesized that perceiving greater threat in the situation would be associated with greater stress, but interacting with someone who is emotionally similar would buffer individuals from this heightened stress. Confirming our hypotheses, greater initial dyadic emotional similarity was associated with a reduced cortisol response and lower reported stress among participants who feared public speaking.
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Polymorphisms of the OXTR gene explain why sales professionals love to help customers
Willem Verbeke et al.
Frontiers in Behavioral Neuroscience, November 2013
Abstract:
Polymorphisms of the OXTR gene affect people's social interaction styles in various social encounters: carriers of the OXTR GG, compared to the OXTR AA/AG in general, are more motivated to interact socially and detect social salience. We focus on sales professionals operating in knowledge intensive organizations. Study 1, with a sample of 141 sales people, shows that carriers of the OXTR GG allele, compared to the OXTR AA/AG allele, are more motivated to help customers than to manipulatively impose goods/services on them. Study 2, using genomic functional magnetic resonance imaging (fMRI) on a sample of 21 sales professionals processing facial pictures with different emotional valences, investigates key nuclei of social brain regions (SBRs). Compared to OXTR AA/AG carriers, OXTR GG carriers experience greater effective connectivity between SBRs of interest measured by Granger causality tests using univariate Haugh tests. In addition, the multivariate El-Himdi and Roy tests demonstrate that the amygdala, prefrontal cortex, and pars opercularis (inferior frontal gyrus) play key roles when processing emotional expressions. The bilateral amygdala and medial prefrontal cortex (mPFC) show significantly greater clout—influence on other brain regions—for GG allele carriers than non-carriers; likewise, the bilateral pars opercularis, left amygdala, and left mPFC are more receptive to activity in other brain regions among GG allele carriers than AG/AA allele carriers are. Thus, carriers of the OXTR GG allele are more sensitive to changes in emotional cues, enhancing social salience. To our knowledge, this is the first study on how insights from imaging genetics help understanding of the social motivation of people operating in a professional setting.
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Andrew Lepp, Jacob Barkley & Aryn Karpinski
Computers in Human Behavior, February 2014, Pages 343–350
Abstract:
While functional differences between today’s cell phones and traditional computers are becoming less clear, one difference remains plain – cell phones are almost always on-hand and allow users to connect with an array of services and networks at almost any time and any place. The Pew Center’s Internet and American Life Project suggests that college students are the most rapid adopters of cell phone technology and research is emerging which suggests high frequency cell phone use may be influencing their health and behavior. Thus, we investigated the relationships between total cell phone use (N = 496) and texting (N = 490) on Satisfaction with Life (SWL) in a large sample of college students. It was hypothesized that the relationship would be mediated by Academic Performance (GPA) and anxiety. Two separate path models indicated that the cell phone use and texting models had good overall fit. Cell phone use/texting was negatively related to GPA and positively related to anxiety; in turn, GPA was positively related to SWL while anxiety was negatively related to SWL. These findings add to the debate about student cell phone use, and how increased use may negatively impact academic performance, mental health, and subjective well-being or happiness.
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Persistence of social signatures in human communication
Jari Saramäki et al.
Proceedings of the National Academy of Sciences, 21 January 2014, Pages 942–947
Abstract:
The social network maintained by a focal individual, or ego, is intrinsically dynamic and typically exhibits some turnover in membership over time as personal circumstances change. However, the consequences of such changes on the distribution of an ego’s network ties are not well understood. Here we use a unique 18-mo dataset that combines mobile phone calls and survey data to track changes in the ego networks and communication patterns of students making the transition from school to university or work. Our analysis reveals that individuals display a distinctive and robust social signature, captured by how interactions are distributed across different alters. Notably, for a given ego, these social signatures tend to persist over time, despite considerable turnover in the identity of alters in the ego network. Thus, as new network members are added, some old network members either are replaced or receive fewer calls, preserving the overall distribution of calls across network members. This is likely to reflect the consequences of finite resources such as the time available for communication, the cognitive and emotional effort required to sustain close relationships, and the ability to make emotional investments.
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Marion Underwood et al.
Journal of Research on Adolescence, forthcoming
Abstract:
In this naturalistic study of adolescents' text messaging, participants (N = 172, 81 girls, age 14) were given BlackBerry devices configured to save their text messages to a secure archive for coding. Two 2-day transcripts collected 4 months apart within the same academic year were microcoded for content. Results showed that most text message utterances were positive or neutral and that adolescents sent text messages primarily to peers and to romantic partners. Only a few sex differences emerged. Frequency of text messages containing negative talk positively predicted overall internalizing symptoms and anxious depression. Text messaging about sex was positively associated with overall internalizing and somatic complaints for girls, but not for boys.
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Facebook User Research Using a Probability-Based Sample and Behavioral Data
Tom Wells & Michael Link
Journal of Computer-Mediated Communication, forthcoming
Abstract:
Research on Facebook users is often based on small convenience samples and on usage data collected through survey self-reports. The current research contributes to Facebook user research, as it is based on a large, nationally representative, probability-based, U.S. sample with Internet usage data collected from meters. Results revealed that 50% of sample members are recent Facebook users. However, within this group, there is wide variation in amount of usage between heavy, medium, and light users. Finally, based on a multivariate analysis, Facebook users are significantly more likely to be women, teens, whites, and adults with at least a high school diploma. These demographic patterns apply to heavy, medium, and light Facebook users.
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David Skuse et al.
Proceedings of the National Academy of Sciences, forthcoming
Abstract:
The neuropeptides oxytocin and vasopressin are evolutionarily conserved regulators of social perception and behavior. Evidence is building that they are critically involved in the development of social recognition skills within rodent species, primates, and humans. We investigated whether common polymorphisms in the genes encoding the oxytocin and vasopressin 1a receptors influence social memory for faces. Our sample comprised 198 families, from the United Kingdom and Finland, in whom a single child had been diagnosed with high-functioning autism. Previous research has shown that impaired social perception, characteristic of autism, extends to the first-degree relatives of autistic individuals, implying heritable risk. Assessments of face recognition memory, discrimination of facial emotions, and direction of gaze detection were standardized for age (7–60 y) and sex. A common SNP in the oxytocin receptor (rs237887) was strongly associated with recognition memory in combined probands, parents, and siblings after correction for multiple comparisons. Homozygotes for the ancestral A allele had impairments in the range −0.6 to −1.15 SD scores, irrespective of their diagnostic status. Our findings imply that a critical role for the oxytocin system in social recognition has been conserved across perceptual boundaries through evolution, from olfaction in rodents to visual memory in humans.
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Karen Rose & Phyllis Anastasio
Personality and Individual Differences, March 2014, Pages 50–53
Abstract:
Although narcissism and psychological entitlement are correlated, they may predict different patterns of interpersonal relationships. We hypothesized that narcissism is primarily about the self, while entitlement is about the self in relation to others. Therefore interpersonal relationships should play a minimal role in narcissism but should occupy a larger role in entitlement. To test this, we had 621 undergraduate students complete the Personal Style Inventory II which measures sociotropic (dependence) and autonomous (independence) interpersonal styles as well as the Psychological Entitlement Scale and the Narcissistic Personality Inventory. We analyzed the variance explained by entitlement and by narcissism for each interpersonal style and their subscales. Narcissism negatively predicted sociotropy and was unrelated to autonomy, indicating low levels of dependence without being overly-independent. Conversely, entitlement positively predicted both sociotropy and autonomy, revealing an inconsistent mix of dependence on others and a need for independence from them. Therefore, although psychological entitlement and narcissism share a self-centric orientation, the two constructs differ in terms of orientation to others.
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The influence of personality on social attention
David Wu et al.
Personality and Individual Differences, forthcoming
Abstract:
The intersection between personality psychology and the study of social attention has been relatively untouched. We present an initial study that investigates the influence of the Big Five personality traits on eye movement behaviour towards social stimuli. By combining a free-viewing eye-tracking paradigm with canonical correlation and regression analyses, we discover that personality relates to fixations towards eye regions. Specifically, Extraversion and Agreeableness were related to greater gaze selection, while Openness to Experience was related to diminished gaze selection. The results demonstrate that who a person is affects how they move their eyes to social stimuli. The results also indicate that personality is a stronger factor in predicting social attention than past studies have suggested. Critical to the influence of personality on attention is the social situations viewers are placed in.