Summation of symbols by pigeons (Columba livia): the importance of number and mass of reward items

In each of 3 experiments, different sets of 4 pigeons (Columba livia) were trained to discriminate between 2 visual symbols that covered wells containing food items that varied in number, mass, or both. In Experiment 1, the symbols were associated with 0, 1, 3, 5, 7, or 9 pieces of grain reward. The pigeons learned to choose the symbol corresponding to the larger reward, and on summation tests, they chose the pair of symbols that summed to the larger total reward. When number of food pellets was varied but mass of reward was held constant in Experiment 2, preference for the larger number symbols failed to appear. When number was held constant and mass was varied in Experiment 3, the pigeons showed a clear preference for the larger mass symbols on single-symbol and summation tests. These findings show that pigeons summate the value of symbols and are more likely to represent symbols by mass of food reward than by number of food items.     

Do People Know How Their Personality Has Changed? Correlates of Perceived and Actual Personality Change in Young Adulthood

Abstract How much do we think our personality changes over time? How well do our perceptions of change correspond with actual personality change? Two hundred and ninety students completed measures of the Big Five personality traits when they first entered college. Four years later, they completed the same measures and rated the degree to which they believed they had changed on each dimension. Participants tended to view themselves as having changed substantially, and perceptions of change showed some correspondence with actual personality change. Perceived and actual change showed theoretically meaningful correlations with a host of variables related to different aspects of college achievement and adjustment.     

The multidimensional nature of ageism: construct validity and group differences

The authors investigated the factor structure and construct validity of the Fraboni Scale of Ageism and the age and gender differences in ageism scores. Confirmatory factor analyses supported the multidimensional nature of FSA scores and generally corroborated the initial factor structure reported by M. Fraboni, with some notable exceptions. Essentially, the present findings were aligned with theoretical models of ageism that emphasize both cognitive facets and affective facets. That is, on the basis of their factor analytic findings, the authors redefined Fraboni's original factors of Antilocution, Avoidance, and Discrimination as Stereotypes, Separation, and Affective Attitudes, respectively, because of the clustering of items within factors. The revised 3-factor structure accounted for 36.4% of the variance in FSA scores. FSA factor scores significantly related to other scores from other measures of age-related attitudes, with higher correlations among factors that were similar in terms of their cognitive nature versus their affective nature. Finally, younger individuals and men had significantly higher ageism scores on the FSA than older individuals and women. The authors discussed the importance of adequately assessing ageism, with particular emphasis devoted to the understanding of age bias.     

John Dewey,The Other Face of the Brazilian New School

This paper intents to analyze the influence of John Dewey’s ideas in the movement that defended the educationl renovation in Brazil (named New School) at the end of the 1920s and in the 1930s. For this, it explains two trends of that movement: the first is described by the metaphor of industrial or mechanical efficiency, whose emphasis was in the power derived from the disciplinary idea of progress, which was embedded in the process of rationalization of the social relations submitted by a factory model; the second, developed by influence of Dewey, is characterized by a project of democratization of society and school that prevented the individual massification and the adoption of the rationalizing model inspired by the factory without any criticism. When Dewey was put in the center of the debate on political, pedagogical and social goals of the Brazilian New School, he was called to introduce a series of concepts that helped to find the balance between the respect for individuality and the observation of the social needs. This paper has some of the conclusions of a major research project, “Philosophy and Science in the New Educational Discourse (Brazil: l930–1960),” sponsored by CNPq.     

Interval-timing deficits in individuals at high risk for schizophrenia

A duration-bisection procedure was used to study the effects of signal modality and divided attention on duration classification in participants at high genetic risk for schizophrenia (HrSz), major affective disorder (HrAff), and normal controls (NC). Participants learned short and long target durations during training and classified probe durations during test. All groups classified visual signals as shorter than equivalent duration auditory signals. However, the difference between auditory and visual signal classification was significantly larger for the HrSz group than for the NC group. We posit a model in which there is a clock rate difference between auditory and visual signals due to an attentional effect at the level of a mode switch that gates pulses into an accumulator. This attentionally mediated clock rate difference was larger for the HrSz participants than for the NC participants, resulting in a larger auditory/visual difference for the HrSz group.     

A prospective examination of body image and smoking cessation in women

This study prospectively examined body image in a community sample of women smokers (N = 141, 89% European–American, M age = 39.5, M BMI = 25.5) participating in a 12-week randomized smoking cessation trial. Participants completed measures assessing subjective and perceptual aspects of body image. Regression analyses showed that subjective body image was predictive of smoking rate at the end of treatment. A MANCOVA revealed that perceptual body image (body size estimation) significantly predicted smoking cessation. Quitting smoking actually worsened body image, although these results were no longer significant after controlling for weight gain. Results support the theory that a negative body image may hamper cessation attempts. In addition, weight gain during smoking cessation may adversely impact body image and lead to an increased risk for relapse.     

Identity, narcissism and the emotional core

This paper describes the course of an analysis which demonstrates how borderline and narcissistic functioning can be understood in terms of a struggle with issues of identity. It shows how such functioning can come to exert a profound hold on the individual and why it seems, at times, a matter of life and death to the patient to avoid states of separation from the analyst. The paper suggests that these complex phenomena can be understood, perhaps surprisingly, in the simple terms of the nature of affect itself. The concept of the emotional core is introduced to embody and highlight that which lies beneath both Jungian and Freudian models (offering a potential bridge between the two models)--namely the psyche's essentially affective nature. It is suggested that the emotional core can serve as an organ of perception giving the individual both their primary relation to reality and an emotional attachment to others. This emotional core is understood to function in a narcissistic manner to preference experiences of sameness and in aversion to experiences of difference--a view consonant with Stern's understanding of infant development where the infant is able to distinguish self from other from the beginning of life (as Fordham also held); taking up Stern's terminology, it gives the individual a 'core' sense of being. There is, however, no stable, on-going sense of 'I' associated with this form of functioning as the individual is immersed in the latest affect to enter consciousness (as in the borderline state of mind) and consequently the individual comes to rely intensely on the other to determine their sense of being (the other becomes a self-regulating other in Stern's terms). The development of ego-functioning gives a more stable and on-going sense of 'I' to the individual, giving contact with the broader personality, allowing the individual to be less reliant on the other and orientating them to reality in a way more fitting to their overall needs. The paper describes how consciousness, which is not seen as identical with the ego, moves between the mode of functioning of the ego and that of the emotional core, i.e., shifting in and out of states where projective identification predominates. It elaborates the range of self-experience encompassing spiritual experience and states of disintegration (which are understood to have a similar structure) on one side, to ego-based experience (which can itself be defensive and rigid at times) on the other. It explores the consequences of such a view for analytic technique and relates it to the Jungian view of the self and the Freudian unconscious.     

Self-experimentation as a source of new ideas: ten examples about sleep, mood, health, and weight

Little is known about how to generate plausible new scientific ideas. So it is noteworthy that 12 years of self-experimentation led to the discovery of several surprising cause-effect relationships and suggested a new theory of weight control, an unusually high rate of new ideas. The cause-effect relationships were: (1) Seeing faces in the morning on television decreased mood in the evening (> 10 hrs later) and improved mood the next day (> 24 hrs later), yet had no detectable effect before that (0-10 hrs later). The effect was strongest if the faces were life-sized and at a conversational distance. Travel across time zones reduced the effect for a few weeks. (2) Standing 8 hours per day reduced early awakening and made sleep more restorative, even though more standing was associated with less sleep. (3) Morning light (1 hr/day) reduced early awakening and made sleep more restorative. (4) Breakfast increased early awakening. (5) Standing and morning light together eliminated colds (upper respiratory tract infections) for more than 5 years. (6) Drinking lots of water, eating low-glycemic-index foods, and eating sushi each caused a modest weight loss. (7) Drinking unflavored fructose water caused a large weight loss that has lasted more than 1 year. While losing weight, hunger was much less than usual. Unflavored sucrose water had a similar effect. The new theory of weight control, which helped discover this effect, assumes that flavors associated with calories raise the body-fat set point: The stronger the association, the greater the increase. Between meals the set point declines. Self-experimentation lasting months or years seems to be a good way to generate plausible new ideas.     

Actor-observer differences in realism in confidence and frequency judgments

Taking a social psychological approach to metacognitive judgments, this study analyzed the difference in realism (validity) in confidence and frequency judgments (i.e., estimates of overall accuracy) between one's own and another person's answers to general knowledge questions. Experiment 1 showed that when judging their own answers, compared with another's answers, the participants exhibited higher overconfidence, better ability to discriminate correct from incorrect answers, lower accuracy, and lower confidence. However, the overconfidence effect could be attributable to the lowest level of confidence. Furthermore, when heeding additional information about another's answers the participants showed higher confidence and better discrimination ability. The overconfidence effect of Experiment 1 was not found in Experiment 2. However, the results of Experiment 2 were consistent with Experiment 1 in terms of discrimination ability, confidence, and accuracy. Finally, in both experiments the participants gave lower frequency judgments of their own overall accuracy compared with their frequency judgments of another person's overall accuracy.