Possibility and probability

Conclusion De Finetti was a strong proponent of allowing 0 credal probabilities to be assigned to serious possibilities. I have sought to show that (pace Shimony) strict coherence can be obeyed provided that its scope of applicability is restricted to partitions into states generated by finitely many ultimate payoffs. When countable additivity is obeyed, a restricted version of ISC can be applied to partitions generated by countably many ultimate payoffs. Once this is appreciated, perhaps the compelling character of the Shimony argument will be less overwhelming and the attractiveness of de Finetti's more permissive attitude will become more apparent.I want to push the permissive tendency in de Finetti still further. It seems doubtful that RUIWC should be required as de Finetti apparently suggested. It is also excessively dogmatic and restrictive to require that the credal states of ideally situated rational agents be numerically definite (Levi 1974, 1980). And de Finetti's rejection of objectivism in statistics overreached itself when he dismissed objective probabilities as meaningless metaphysical artefacts (Levi 1986). In this respect, the philosophically most important lessons de Finetti has to teach us are to be found not in his celebrated representation theorem but in his discussions of the relations between 0-probability and possibility, conditional probability and countable additivity. Perhaps, the technical issues involved are remote and pedantic. But the attitude de Finetti sought to inculcate is of profound importance.Thanks are due to Teddy Seidenfeld whose comments have improved this paper substantially. He is not to blame for its lingering defects.     

Use of the pigmentometer,a new device for measuring skin albedo: Relating skin color with a series of physiological measures

Use of the Pigmentometer, a new device for measuring skin albedo: Relating skin color with a series of physiological measures. An apparatus has been described for the indirect measurement of skin albedo in human subjects. This device operates on the principle of the reflectance of light as influenced by the lightness or darkness of the skin. This new equipment was used to examine the relationship between lightness or darkness of the skin and the basal level and responsivity of some autonomic nerovus system physiological variables in a series of 46 black and 47 white male and female subjects. It was observed that blacks had significantly lower (darker) skin albedo (PI), a significantly higher skin resistance (SR) and amplitude of the galvanic skin response (GSR), and an insignificant higher basal heart rate (HR). Pearson Product-Movement correlations between all measures from the total population showed significant relationships between PI and SR, SR and GSR and HR and HRR (heart rate response). The further separation of the total population into subgroups of blacks, whites, males, females, and black and white male and female groups, respectively, altered some of these differences and relationships previously observed. These results appeared to support the premise that race is more responsible for influencing the measured physiological responses, particularly SR, than is the lightness or darkness of the skin.     

Behavioral training for teachers in special education: the Gonzaga University program

The Gonzaga University's behaviorally based Department of Special Education offers an undergraduate major in special education for the completion of a Bachelor of Education degree, as well as a Master of Education in Special Education. The basic behavioral, data‐based model, philosophy, and courses are outlined at both the undergraduate and graduate levels. Outcome data gathered from the program's consumers indicated high levels of student and employer satisfaction with the program, the faculty, and the curricular content. The manner in which the program is viewed as compatible with state and national accrediting bodies is discussed. Copyright © 1999 John Wiley & Sons, Ltd.     

The importance of including quality-of-life indices in international social and economic development activities

Psychology has not been a visible player in international social and economic development efforts. Through its demonstrated commitment to the concept of quality of life, psychology has an opportunity to help shape foreign policy and to improve the lives of countless people around the globe. Poverty has reached unacceptable limits of humanitarian tolerance and political consequence throughout the world. The United Nations estimates that 20% of the world's population now lives in conditions of absolute poverty in which there is an absence of even the bare essentials for living. Social and economic development efforts have often failed despite good intentions because they have often concentrated on improving peoples' material level of living but not their quality of life. This article addresses the need to include quality-of-life (QOL) indices in international social and economic development efforts. In addition, the article calls attention to the need to use valid cross-cultural measurement strategies (i.e., culturally equivalent) when assessing QOL across cultural and national boundaries. Current approaches to social and economic development rely heavily on interventions that do not reflect the actual peoples' perceptions of life satisfaction and subjective well-being. Self-serving political and economic national interests have kept new approaches to development from being implemented. New interventions must be holistic, decentralized, integrated, empowering, participatory, and human-resource directed, and must include culturally equivalent objective and subjective quality-of-life indices as the arbiters of success.     

Toleration and prejudice-reduction: Two ways of improving intergroup relations

While a large body of social psychological research has shed light on the nature of prejudice and how to reduce it, we argue that such work does not address situations of cultural or religious outgroup beliefs and practices that are considered incompatible with one's own. The present theoretical article contrasts a prejudice-reduction approach with a toleration-based approach to consider the differences each have with regard to the attitude object they focus upon, the perceived reasonableness of the attitude, and the behavioral consequences each may lead to. In doing so, we consider the psychological processes involved in whether the negative attitude leads to negative actions. We conclude by arguing that a toleration-based approach forms an important addition to the psychological thinking about cultural diversity and intergroup relations. Collectively, the present work makes a novel contribution to the social psychological literature by stimulating theory development and raising novel questions for empirical research.     

The effects of reciprocal peer tutoring with a group contingency on quiz performance in vocabulary with seventh-and eighth-grade students

The purpose of this study was to compare reciprocal peer tutoring with a group contingency to a traditional vocabulary program in a regular middle-school classroom. The participants were 20 seventh and 12 eighth-grade students enrolled in a private parochial school. A counter-balanced time-series design was employed to evaluate the effects of reciprocal peer tutoring across the two groups of students. The overall results indicated that when students participated in reciprocal peer tutoring, scores on weekly quizzes in vocabulary were signifcantly higher. Reciprocal peer tutoring with a group contingency was beneficial to middle school students, easy to implement, and a cost- and time-efficient system for teachers and students. © 1997 John Wiley & Sons, Ltd.     

Critical stages in mental development: Childhood breath holding spells (BHS)

The authors present the first part of a study on children with BHS (Breath Holding Spells) syndrome. These children were chosen in order to examine a “pathological” situation in infancy that was as close as possible to a “normal” one, and in which obvious somatic symptoms were associated with emotional states. Children with BHSS are not considered to have serious psychological disturbances, even if they are constantly referred to as intolerant of separation, stubborn, oppositional, or easy to temper tantrum. A reduced ability to tolerate frustration is evident in these children both from the patients' history and clinical observation. Parents usually relate BHS to situations in which the child is denied something or gets scolded. The children were observed during three sessions, both with and without the mother, according to a grid used at our Center. Patients are presented to illustrate certain recurrent features in play and interaction with mother. The data suggest that these children stagnate in an area of incomplete mental representation; something makes them oscillate between two states; in one of them, the mental representation of the object and of the bond with it is possible; in the other, the mental representation of the separation, which entails the recognition of the object, is felt as dangerous.     

The Authoritarian Personality, 50 Years Later: What Questions Are There for Political Psychology?

Adorno, Frenkel-Brunswik, Levinson, and Sanford's The Authoritarian Personality is probably the most deeply flawed work of prominence in political psychology. The methodological, procedural, and substantive errors of this study are well known, but they are frequently simply attributed to poor methodological judgments, issues of scaling (such as response set), or Freudian theories that legitimated circular interpretations. But a more fundamental bias arose from the attempt to empirically verify the existence of a "type" of person whom the researchers thought dangerous and with whom they did not empathize. This attempt involved two dangerous procedures: (1) the fusion of nominalist research procedures (in which empirical results were used to type respondents) with a realist interpretation of types (in which some people "just were" authoritarians and others not), and (2) a theoretically rich critique of the authoritarians and a lack of interest in the psychodynamics of liberals. This combination led to an intrinsically biased interpretive project that could not help but accumulate damning evidence about authoritarians. These subtler problems have haunted contemporary work in political psychology that avoids the methodological problems of Adorno et al.; Altemeyer's work on authoritarianism, which not only is free from the defects of the Adorno et al. study but also involves some methodologically exemplary experiments, is similarly distorted by asymmetries. The same fundamental problems seem to be at the heart of the weaknesses of the theory of symbolic racism to which critics have pointed. Political psychologists should regard The Authoritarian Personality as a cautionary example of bias arising from the choice of methodological assumptions.