Mirror Neurons and the Evolution of Embodied Language

ABSTRACT— Mirror neurons are a class of neurons first discovered in the monkey premotor cortex that activate both when the monkey executes an action and when it observes the same action made by another individual. These neurons enable individuals to understand actions performed by others. Two subcategories of mirror neurons in monkeys activate when they listen to action sounds and when they observe communicative gestures made by others, respectively. The properties of mirror neurons could constitute a substrate from which more sophisticated forms of communication evolved; this would make sense, given the anatomical and functional homology between part of the monkey premotor cortex and Broca's area (the "speech" area of the brain) in humans. We hypothesize that several components of human language, including some aspects of phonology and syntax, could be embedded in the organizational properties of the motor system and that a deeper knowledge of this system could shed light on how language evolved.     

Moral approval of aggression and sex role identity in officer trainees,conscientious objectors to military service,and in a female reference group

The Moral Approval of Aggression Inventory (MAAI) and Bem's Sex Role Inventory (BSRI) were administered to three experimental groups: officer trainees ( = OTs, n = 48), conscientious objectors to military service ( = COs, n = 35), and to a group of women of comparable age (n = 32). Aggression was mostly approved of among OTs and the least among COs, the women scoring in the middle somewhat closer to OTs. Differences in choice of sex role identity emerged, so that OTs often chose a masculine sex role, while for COs, the choice of an androgynous role was the most frequent one. Women chose feminine and androgynous roles with equal frequency. Moral approval of aggression could not be explained on the basis of sex role identification. The strongest determinator of moral approval of aggression was the choice of refusal to engage in military service.     

Moral approval of aggressive acts: A preliminary investigation

A questionnaire was used to investigate 1) the approval of various kinds of aggressive behaviour under different specified circumstances and 2) the arousal of feelings of aggression in imagined situations. In addition, an attitude test was presented which discriminated between the two highest of Kohlberg's levels of moral reasoning [1969]. The subjects were a very varied group of 83 adults (aged 17–68 years) from municipal evening courses in Finland. Aggression was most approved when it was given altruistic purpose. Self-defense was rated as the second highest justification for aggression. Aggression was found least legitimate when the reasons were emotional (drunk, rage). The justification of some types of aggressive behaviour were dependent on the conditions under which they occurred, whereas others appeared independent. Killing and torture were the most disapproved kinds of aggressive behaviour. Another's attack was the most powerful instigator of feelings of aggression, whereas frustration seemed relatively unimportant. Females approved of emotional expressions of aggression to a greater extent than did males. The moral test did not correlate with approval of aggression in general, but a couple of more specific predictions about the effects of level of moral reasoning on attitudes to socially sanctioned forms of aggression were tentatively confirmed.     

Failure to induce aggression in inhibited and in genetically non-aggressive mice through injections of ethyl alcohol

Two kinds of nonaggressive mice were used as subjects: 1) males from a strain selectively bred for nonaggressiveness (TNA) and 2) males from a strain selectively bred for aggressiveness (TA) but made nonaggressive by defeats in fights. The aggressiveness of neither type of animal was increased by injections of ethyl alcohol in concentrations of 1 gm/kg and 1.5 gm/kg. Three series of experiments were performed. The results were incompatible with the assumption of a general physiological aggression-heightening effect of ethanol, and also with an assumption of removal by alcohol of learned inhibitions against aggression.     

Understanding Student Complaints in the Service Learning Pedagogy

This study draws upon student evaluations across 3 years of service learning (SL) courses at a large, urban, faith-based university identifying issues of greatest concern to students. Analysis of qualitative responses revealed perspectives on the limits, pitfalls, and barriers to successful SL student work in the community replicated over the 3 year timeframe. Over 2,200 written responses were coded and tested for reliability for each of 3 years. The top three comments SL students were most likely to express included: (1) concern about their placement in the community, for example, that sites were not prepared or that further goal-setting, communication and training by the university was necessary; (2) that the university’s choice of sites may have been ill considered; and, (3) that there were problems with time and scheduling. Ongoing assessment of students’ perspectives on their placement experience identifies practices that can enhance their learning and contributions toward building stronger communities.     

A modified mark test for own-body recognition in pig-tailed macaques (Macaca nemestrina)

Classic mirror self-recognition mark tests involve familiarizing the subject with its mirror image, surreptitiously applying a mark on the subject’s eyebrow, nose, or ear, and measuring self-directed behaviors toward the mark. For many non-human primate species, however, direct gaze at the face constitutes an aggressive and threatening signal. It is therefore possible that monkeys fail the mark test because they do not closely inspect their faces in a mirror and hence they have no expectations about their physical appearance. In the current study, we prevented two pig-tailed macaques (Macaca nemestrina) from seeing their own faces in a mirror, and we adopted a modified version of the classic mark test in which monkeys were marked on the chest, a body region to which they normally have direct visual access but that in the current study was visible only via a mirror. Neither monkey tried to touch the mark on its chest, possibly due to a failure to understand the mirror as a reflective surface. To further the monkeys’ understanding of the mirror image, we trained them to reach for food using the mirror as the only source of information. After both monkeys had learned mirror-mediated reaching, we replicated the mark test. In this latter phase of the study, only one monkey scratched the red dye on the chest once. The results are consistent with other findings suggesting that monkeys are not capable of passing a mark test and imply that face and body recognition rely on the same cognitive abilities.     

Estimating rates of chronic fatigue syndrome from a community-based sample: A pilot study

Most of the Chronic Fatigue Syndrome (CFS) epidemiological studies have relied on physicians who refer patients having at least 6 months of chronic fatigue and other symptoms. However, there are a number of potential problems when using this method to derive prevalence statistics. For example, some individuals with CFS might not have the economic resources to access medical care. Other individuals with CFS might be reluctant to use medical personnel, particularly if they have encountered physicians skeptical of the authenticity of their illness. In addition, physicians that are skeptical of the existence of CFS might not identify cases. In the present pilot study, a random community sample (N=1,031) was interviewed by telephone in order to identify and comprehensively evaluate individuals with symptoms of CFS and those who self-report having CFS. Different definitions of CFS were employed, and higher rates (0.2%) of CFS were found than in previous studies. Methodological benefits in using more rigorous epidemiological methods when estimating CFS prevalence rates are discussed. The authors appreciate the generous financial support of the CFIDS Association and Minnan, Inc. We also are grateful for many helpful suggestions provided by Judith A. Richman, William McCready, Wendell Richmond, and Stephen E. Goldston. Finally, we are very thankful to the many undergraduate volunteers who helped us complete this study, and they include Cheryl Stenzel, Georgina DeLa Torre, Vickie Chrisos, Don Banik, Hillary Loeb, Leslie Ramesack, Ellen Diamond, Rob Bleeker, Gib Garza III, Mindy Silverstein, Kadip Sen, Meredith Lombrazo, Brian Miller, Caroline Marsden, Lorraine Whitmore, Stan Gayot, Karen Costakis, and Dave Sobotka.     

Procrastinators and Clutter: An Ecological View of Living with Excessive “Stuff”

In the present study, young adults (n = 346; M age = 21.5 years old) completed self-reported measures of procrastination, self-identity with possessions, clutter, place attachment, and psychological home to provide an ecological understanding of the context in which chronic procrastinators live. Results found behavioral procrastination tendencies related only to clutter (a belief that living spaces have too much “stuff,” feeling overwhelmed with excessive possessions, and that one’s personal life is negatively impacted by many possessions). Clutter in one’s living space, negative emotions, and impaired social ability all predicted high procrastination scores. Clutter was the best predictor of procrastination as determined by multiple regression. Taken together, chronic procrastinators reported too much clutter (possessions, or stuff), and that clutter interferes with a strong quality of their lives.