Elementary Polyhedral Mereotopology

A region-based model of physical space is one in which the primitive spatial entities are regions, rather than points, and in which the primitive spatial relations take regions, rather than points, as their relata. Historically, the most intensively investigated region-based models are those whose primitive relations are topological in character; and the study of the topology of physical space from a region-based perspective has come to be called mereotopology. This paper concentrates on a mereotopological formalism originally introduced by Whitehead, which employs a single primitive binary relation C(x,y) (read: x is in contact with y). Thus, in this formalism, all topological facts supervene on facts about contact. Because of its potential application to theories of qualitative spatial reasoning, Whitehead's primitive has recently been the subject of scrutiny from within the Artificial Intelligence community. Various results regarding the mereotopology of the Euclidean plane have been obtained, settling such issues as expressive power, axiomatization and the existence of alternative models. The contribution of the present paper is to extend some of these results to the mereotopology of three-dimensional Euclidean space. Specifically, we show that, in a first-order setting where variables range over tame subsets of R ³, Whitehead's primitive is maximally expressive for topological relations; and we deduce a corollary constraining the possible region-based models of the space we inhabit.     

How Do U.S. Students Perceive Trans Persons?

This study explored undergraduate students’ interpersonal responses, namely general feelings toward and desire for further social interaction with trans persons in a helping context. Secondarily, this study explored the relationship between participants’ intrinsic empathy, interpersonal curiosity and interest in further interaction. Two hundred fifty-one undergraduates at a moderate sized university in the southeastern United States served as participants. In order to assess baseline levels of empathy and curiosity, participants in session 1 completed the Interpersonal Reactivity Scale (Davis 1983) and the Interpersonal Curiosity Scale (Litman and Pezzo 2007). One week later, during session 2, the same students assumed the role of a peer counselor and read 1 of 4 (male, female, male-to-female, female-to-male) randomly assigned versions of an intake form completed by a fictitious peer client. Each version was identical, with the exception of the gender identity of the peer client. Participants completed various measures of affect and interest in further interaction. Male participants reported less willingness to interact with, and the strongest negative feelings toward the FTM peer client. Men reported highest willingness to interact with the MTF client and showed the lowest negative reactions towards the MTF client. Female participants’ scores on willingness to interact and on negative reactions were similar across all four intake form versions. Contrary to expectations, baseline levels of empathy and curiosity did not impact responses to gender expression. Further investigation is needed to elucidate the factors associated with anti-transgender prejudice particularly in the context of helping relationships.     

Trajectories of perceived superiority across the transition to marriage

ABSTRACT

Perceived superiority, the tendency to regard one’s own relationship as better than other people’s relationships, is a key relationship maintenance mechanism. Little is known about whether and how it changes during the transition to marriage, a pivotal moment in most couples’ life cycle. In a longitudinal study following 97 couples for three waves across the transition, men presented stable perceived superiority, whereas women presented a curvilinear change in superiority perceptions, with a substantial increase in perceived superiority between T1 and T2 and a significantly reduced change between T2 and T3. In addition, trajectories differed according to partners’ commitment level. More committed and less committed partners both showed a curvilinear change in perceived superiority, though following different patterns. Results point to the functional value of perceived superiority, which emerges as a strategy aimed at sustaining partners through the challenges deriving from the transition to marriage.