Foundations of Probability

The foundations of probability are viewed through the lens of the subjectivist interpretation. This article surveys conditional probability, arguments for probabilism, probability dynamics, and the evidential and subjective interpretations of probability.     

Doing what the mob do: priming effects on conformity

This study considered whether participants' tendency to conform to a group norm could be influenced by priming them with categories associated with either conformity or anarchy. Participants were primed with one of two categories: ‘accountant prime’, ‘punk prime’ (plus a baseline ‘no prime’). They then participated in a variant of the Asch ( 1951 ) conformity paradigm. Results indicated that ‘punk’-primed participants conformed significantly less than did ‘accountant’-primed participants, with the mean for the ‘no-prime’ condition lying in between the two. ‘Accountant’-primed participants conformed to the group norm more than did the ‘no-prime’ participants. In addition, the performance of ‘punk’-primed participants was comparable to that of participants who performed the judgment task in isolation (‘solo’ condition). This indicates that conformity pressures did not affect estimates for ‘punk’-primed participants. Implications of these findings are discussed. Copyright © 2001 John Wiley & Sons, Ltd.     

��I��ll Get That for You��: The Relationship Between Benevolent Sexism and Body Self-Perceptions

Benevolent sexism has been shown to have negative consequences for women. In the present study, we investigated whether there were differences in reports of body self-perceptions between 93 college women in the southeastern United States who either witnessed or did not witness a staged act of benevolent sexism. Because we believed that benevolent sexism could make beauty norms more salient, we hypothesized that women who witnessed benevolent sexism would report higher levels of self-objectification, body surveillance, and body shame. Women who witnessed benevolent sexism did report higher levels of surveillance and shame, constructs associated with self-objectification, but not higher general levels of self-objectification. This research provides more evidence of the negative effects benevolent sexism has on women.     

The Utilization and Choices of Aneuploidy Screening in a Midwestern Population

The types, interpretation, and use of first- and second-trimester aneuploidy screening are often unclear for many women. This impairs appropriate decision making and understanding of the implications of prenatal genetic testing options. The purpose of this study was to examine the utilization of Stepwise Sequential screening in our Midwestern population, demographic factors associated with choice of screening and method of risk reporting and it’s potential impact on women’s choices. First trimester screening was performed for 2,634 women during the study period. Results were not reported or “framed” as “positive” or “negative”. Rather, the specific age-risk and screen-risk for T21 were relayed, along with options for follow-up Stepwise Sequential screening and invasive testing. Nearly 80 % of women declined Stepwise Sequential screening. Minorities and women of lower education were least likely to pursue further screening. Less than 4 % of the study population elected invasive testing. First trimester screening was associated with a 53 % reduction in amniocenteses and 20 % fewer CVS’s compared to pre-first trimester screening availability. Reporting age-and screen-risks for T21, rather than classifying results as “positive” or “negative” based on a pre-determined threshold, was associated with a low uptake of further testing.     

The Role of Attitudes Toward White Privilege and Religious Beliefs in Predicting Social Justice Interest and Commitment

The current study examines links among attitudes toward White privilege, religious beliefs, and social justice interest and commitment for White Christian students. Two distinct patterns of results emerged from a path analysis of 500 White Christian students. First, a willingness to confront White privilege was positively associated with the sanctification of social justice (i.e., attributing spiritual significance to working for social justice) and both were positively associated with social justice interest and commitment. Second, awareness of White privilege was negatively associated with religious conservatism, and religious conservatism was negatively associated with social justice interest. These patterns show that White privilege attitudes directly (i.e., willingness to confront White privilege) and indirectly (i.e., awareness of White privilege through religious conservatism) predicted social justice interest and commitment. Moreover, religious beliefs demonstrated opposite patterns of association with social justice interest and commitment such that the sanctification of social justice positively predicted social justice interest and commitment whereas religious conservatism negatively predicted social justice interest. Overall, findings demonstrate direct and indirect links between White privilege attitudes, religious beliefs, and social justice interest and commitment. Limitations and implications for future community psychology research and collaboration also are discussed.     

A breakdown in the family unit

In his article, "Autonomy and beneficence in the family," David J. Doukas describes the dynamic relationship between the family and the physician. He points out: "the family covenant spells out the obligations of all parties to give and receive respect and beneficial care within the realm of medical practice"....While this model may provide a framework for ethical discussion under certain circumstances, it falls short in several major respects....     

Pregnancy reduction in Jewish law

10% of infertile women who become pregnant with the aid of hormonal stimulation become pregnant with multiple fetuses. 20% of mothers of triplets experience preeclampsia and 35% risk serious postpartum hemorrhage. Risk increases with the number of fetuses for venous stasis, varicose veins, phlebothrombosis, thrombophlebitis, and embolic phenomena. Risk increases proportionally with increased number of fetuses for fetal morbidity and mortality. Selective abortion is often used as a method of reducing risk to both the woman and the fetuses, thus increasing the chance that 1 or 2 fetuses will be born healthy. A related issue is the selective reduction of fetuses in multiple pregnancies that may have a genetic defect like Hurler's syndrome, microcephaly, Tay-Sachs disease, spina bifida, hemophilia A, or thalassemia major. In cases where 1 fetus in a set of twins is so inclined, the reduction of the defective fetus increased the success of the remaining co-twin. Selective reduction should not pose a problem for Jewish women since the procedure does not violate any Jewish legal or moral rules. In Jewish law an unborn fetus is not considered a person until it is born. Until the 40th day of pregnancy it is considered as 'mere fluid.' In order to stress the positive aspect of selective reduction it should be called "enhanced survival of multifetal pregnancies."     

Categorical perception of nonspeech sounds by 2-month-old infants

According to recent investigations, adult listeners perceive rise-time differences in both speech and nonspeech stimuli in a categorical manner (Cutting & Rosner, 1974). Adults labeled sawtooth-wave stimuli as either plucked or bowed. The present study uses the high-amplitude sucking technique to explore the 2-month-old infant’s perception of rise-time differences for sawtooth stimuli. Infants discriminated rise-time differences which marked off the different nonspeech categories, but did not discriminate equal differences within either category. Thus, the present study shows that infants, like adults, can perceive nonspeech stimuli in a categorical manner.