Mutual Grooming in Human Dyadic Relationships: An Ethological Perspective

Despite its widespread practice among primates writ large, social scientists have given mutual grooming among humans little attention. This research provides an important first step in describing mutual grooming among humans. A scale was developed to measure self-reported giving and receiving of grooming. In Study 1, 184 female and 94 male participants first indicated their closest emotional relationship (for example, romantic partner, best friend, etcetera). They then completed the grooming measure pertaining to that emotionally close target person. Finally, they completed indices of relationship trust, relationship satisfaction, and parental/familial affection. Individuals who focused on their romantic partners (N = 134) reported more mutual grooming than individuals who focused on other types of relationships. Relationship satisfaction, previous experience of familial affection, and trust were positively correlated with mutual grooming for romantically involved individuals. Study 2 (N = 71 heterosexual couples) explored psychological correlates of mutual grooming within romantic dyads. Individuals with more promiscuous attitudes and those who scored high on the anxiety subscale of an adult attachment style measure reported grooming their partners most frequently. Findings were consistent with several proposed functions of grooming: (a) potential parental-investment indicator, (b) developing trust, and (c) courtship/flirtation—all of which play roles in pair-bonding. At first glance, humans may not appear to groom each other with the same fervor as other primates. However, we posit that humans are, in actuality, groomers par excellence.     

Mutual Grooming in Human Dyadic Relationships: An Ethological Perspective

Despite its widespread practice among primates writ large, social scientists have given mutual grooming among humans little attention. This research provides an important first step in describing mutual grooming among humans. A scale was developed to measure self-reported giving and receiving of grooming. In Study 1, 184 female and 94 male participants first indicated their closest emotional relationship (for example, romantic partner, best friend, etcetera). They then completed the grooming measure pertaining to that emotionally close target person. Finally, they completed indices of relationship trust, relationship satisfaction, and parental/familial affection. Individuals who focused on their romantic partners (N = 134) reported more mutual grooming than individuals who focused on other types of relationships. Relationship satisfaction, previous experience of familial affection, and trust were positively correlated with mutual grooming for romantically involved individuals. Study 2 (N = 71 heterosexual couples) explored psychological correlates of mutual grooming within romantic dyads. Individuals with more promiscuous attitudes and those who scored high on the anxiety subscale of an adult attachment style measure reported grooming their partners most frequently. Findings were consistent with several proposed functions of grooming: (a) potential parental-investment indicator, (b) developing trust, and (c) courtship/flirtation—all of which play roles in pair-bonding. At first glance, humans may not appear to groom each other with the same fervor as other primates. However, we posit that humans are, in actuality, groomers par excellence.     

Taxometric analysis of the antisocial features scale of the personality assessment inventory in federal prison inmates

The Antisocial Features (ANT) scale of the Personality Assessment Inventory (PAI) was subjected to taxometric analysis in a group of 2,135 federal prison inmates. Scores on the three ANT subscales-Antisocial Behaviors (ANT-A), Egocentricity (ANT-E), and Stimulus Seeking (ANT-S)-served as indicators in this study and were evaluated using the following taxometric procedures: mean above minus below a cut (MAMBAC), maximum eigenvalue (MAXEIG), and latent mode factor analysis (L-Mode). Objective and subjective evaluation of the results revealed consistent support for a dimensional interpretation of latent structure across the di ferent taxometric procedures as well as across gender, race, and security level. As a dimensional construct, antisocial personality disorder arranges respondents along one or more quantitative dimensions (degree of antisociality), rather than assigning them to qualitatively distinct categories (antisocial or not antisocial).     

Physical activity and psychological well-being in children with Type 1 diabetes

Physical activity and psychological well-being contribute to positive lifestyle and well-being in youngsters who have Type 1 diabetes. The aims of this study were to objectively assess the physical activity levels of children with Type 1 diabetes, and investigate associations between physical activity levels, psychological well-being and HbA(1c). Thirty-six children, mean age 12.8 years, participated in the investigation. Physical activity was assessed using heart rate monitoring over four days. Children further completed the Diabetes Quality of Life for Youths Questionnaire, the Physical Self-Perception Profile for Children and the Self-Efficacy for Diabetes Scale. Routine outpatient HbA(1c) measurements were recorded. There were no significant associations between psychological well-being and physical activity, or HbA(1c) and physical activity, thus suggesting physical activity does not directly relate to psychological well-being in children with Type 1 diabetes. It may be that the effect of physical activity differs from that in children without Type 1 diabetes because of the place of physical activity within diabetes management and the need to balance this with insulin dosage and dietary intake to maintain blood glucose levels.     

The psychophysiology of adult attachment relationships: Autonomic reactivity in marital and premarital interactions

To better understand the origins of autonomic reactivity during marital interactions, this study examined the psychophysiological profiles of prototypically secure (vs. insecure) and deactivating (vs. hyperactivating) adults while they talked about areas of disagreement with their (pre)marital partners. Adults who idealized their caregivers and/or normalized harsh childhood experiences during the Adult Attachment Interview (i.e., deactivating adults) manifested heightened electrodermal reactivity, a sign of emotional inhibition, while attempting to resolve conflict in their relationships, whereas individuals who became angrily or passively caught up while discussing their early lives (i.e., hyperactivating adults) later showed increases in heart rate while conversing with their partners, suggesting behavioral activation. In contrast, security was associated with low levels of electrodermal change from baseline in the context of this normatively mild marital stressor. Results were generally consistent for 40 younger engaged and 40 mature married couples.     

Recognition of nonverbal affect and schizotypy

The authors assessed the degree to which schizotypal characteristics in a nonclinical population were associated with impairments in the ability to correctly identify emotions as expressed in facial, paralinguistic, and postural cues. Participants completed the Schizotypal Personality Questionnaire (SPQ; A. Raine, 2005), and the 3 receptive subtests of the Diagnostic Analysis of Nonverbal Accuracy-2 (DANVA2; S. Nowicki Jr., 2005). The SPQ subscales No close friends and Suspiciousness were correlated with impaired ability to correctly identify postural affective cues on the DANVA2. Unusual perceptual experiences were correlated with deficits in the ability to identify emotions on the DANVA2 paralinguistic measure. Impairments in the ability to correctly perceive and respond to expressions of affect may be part of a deficit in social cognition that contributes to development of schizotypal traits.