Reply to Loewy: Anencephalics and Slippery Slopes

Theoretical Medicine and Bioethics -     

Of Sentiment,Caring and Anencephalics: A Response to Sytsma

Theoretical Medicine and Bioethics -     

Academic expectations as sources of stress in Asian students

Education is highly valued in Confucian Heritage Culture (CHC) countries such as China, Taiwan, Singapore, Hong Kong, Japan and Korea but the expectations of parents, teachers and students themselves to excel academically can also be a source of intense stress for many students. The Academic Expectations Stress Inventory (AESI), developed by Ang and Huan (Educ Psychol Meas 66: 522–539, 2006) to measure parent, teacher and self expectations as sources of academic stress in Asian adolescents, was administered to 176 Singaporean secondary and college students one month before their major examinations. Rasch analyses of the students’ responses to the AESI showed the nine items in the inventory formed a robust unidimensional scale of academic stress, with two separate unidimensional subscales of Expectations of Parents and Teachers and Expectations of Self complementing the factor analysis conducted by Ang and Huan (Educ Psychol Meas 66: 522–539, 2006). The item thresholds showed the AESI measured the student trait range adequately, and affirmed the inventory as a brief yet valid measure of academic stress for Asian students from a CHC background. The AESI is a valuable tool for teachers and researchers, as it provides an understanding of the role of parents, teachers and self expectations as sources of academic stress among students from a CHC background.     

Indispensability and group identification as sources of task motivation

Traditional Instrumentality × Value (I × V) models have attributed gains in performance groups to various conditions affecting the instrumentality of group members’ effort for a variety of valued outcomes. Social identity models have challenged this interpretation, suggesting that the instrumentality of effort may be irrelevant when group identification is high. A laboratory study is reported in which both indispensability and group identification are manipulated, and participants’ effort on a physical persistence task is assessed. Contrary to the social identity predictions but consistent with I × V predictions, the indispensability of effort had a positive effect on participants’ effort. Group identification had no direct or moderating effects on effort.     

Social network profiles as information sources for adolescents' offline relations

This article presents the results of a study concerning the use of online profile pages by adolescents to know more about "offline" friends and acquaintances. Previous research has indicated that social networking sites (SNSs) are used to gather information on new online contacts. However, several studies have demonstrated a substantial overlap between offline and online social networks. Hence, we question whether online connections are meaningful in gathering information on offline friends and acquaintances. First, the results indicate that a combination of passive uncertainty reduction (monitoring a target's profile) and interactive uncertainty reduction (communication through the target's profile) explains a considerable amount of variance in the level of uncertainty about both friends and acquaintances. More specifically, adolescents generally get to know much more about their acquaintances. Second, the results of online uncertainty reduction positively affect the degree of self-disclosure, which is imperative in building a solid friend relation. Further, we find that uncertainty reduction strategies positively mediate the effect of social anxiety on the level of certainty about friends. This implies that socially anxious teenagers benefit from SNSs by getting the conditions right to build a more solid relation with their friends. Hence, we conclude that SNSs play a substantial role in today's adolescents' everyday interpersonal communication.     

Behavioural style and group cohesiveness as sources of minority influence

Behavioural style and group cohesiveness were tested as sources of minority influence under conditions in which rejection of the minority from the group was possible and under conditions in which it was not. Female subjects (N = 120) were led to believe that they were interacting as a group and that they held a majority position on a relevant issue. The influence agent, ostensibly one of the group members, advocated a minority position throughout their interaction. Three variables were manipulated: group cohesiveness (high or low), behavioural style of the deviate (high or low consistency) and opportunity for rejection of the deviate from the group (possible or not possible). It was predicted that the deviate would be more influential under high cohesive than under low cohesive conditions and that she would be most influential when she was highly consistent and there was no opportunity to reject her. Although both hypotheses were confirmed, unexpected minority influence effects were also found.     

Wrinkling and head shape as coordinated sources of age-level information

Changes in the shape of a human head and the development of facial wrinkles were examined as potential sources of information about age level. In Experiment 1, subjects estimated the ages of faces that had been produced by systematically manipulating characteristic head shapes and levels of wrinkles associated with ages 15, 30, 50, and 70 years. The results indicated that observers used both sources of craniofacial change in making age estimates; but the effect of either source of change on perceived age depended upon the level of the other source of change. In Experiment 2, subjects’ ratings of the apparent conflict between levels of head shape and wrinkles further substantiated the conclusion that observers are sensitive to the coordination of products of the two sources of change. These findings suggest that the information specifying perceived age level is a complexrelationship among different types of craniofacial change.     

Shadows as sources of cues for distance of shadow-casting objects

Shadows are neglected sources of information about shadow-casting objects' distance (location). In an experiment using real shadows, participants judged the distance of two rods, either with shadows (illumination from the left) or without shadows. Without shadows, a thin rod raised slightly above the surface was incorrectly judged to be more distant than a thick rod, but with shadows the thin rod was accurately judged to be closer. For judgments to be correct, shadows had to overwhelm competing height and stimulus-size cues. Exp. II involved nonoverlapping shadows produced by a light placed in front of the rods. Again, without shadows the thin-elevated rod was incorrectly judged to be more distant, but with shadows it was correctly judged to be closer. Exp. III involved two sets of thick and thin elevated rods and frontal lighting. Judgments were accurate when shadows were present but inaccurate when shadows were absent. Experiments conducted through the American Psychological Society Web-research site replicated results of Exp. I, II, and III. A final Web experiment replicated results of the others, but with shadows produced by illumination from the right. Three properties of shadows--angles, interposition, and positioning--are possible sources of distance information associated with cast shadows.     

The use of prisoners as sources of organs--an ethically dubious practice

The movement to try to close the ever-widening gap between demand and supply of organs has recently arrived at the prison gate. While there is enthusiasm for using executed prisoners as sources of organs, there are both practical barriers and moral concerns that make it unlikely that proposals to use prisoners will or should gain traction. Prisoners are generally not healthy enough to be a safe source of organs, execution makes the procurement of viable organs difficult, and organ donation post-execution ties the medical profession too closely to the act of execution.     

Groups as social network members: Overlooked sources of social support

In a study of the link between physical disability and social relationships among the elderly, questions about social network and social support evoked a surprisingly large number of group responses. People mentioned "my grandchildren," "the people in my building," "people at the senior center," and other groups in ways that suggested that the real unit of support was extraindividual and could not be accurately understood by reference to individual people within those groups. This paper describes the frequency of such responses and the circumstances under which they emerged. Definitions of social support and of social network should not be restricted to dyadic relationships between individuals; better understanding of social support processes would derive from consideration of the kinds of social support functions best offered by groups vs. individuals and consideration of differences in the ways in which support is derived from groups and individuals.     

Predictors of willingness to register as an organ donor among dutch adolescents

Abstract

In order to identify relevant determinants of organ donor registration among Dutch adolescents, a school-based cross-sectional survey was conducted among 145 high school students. Fifty-one percent of respondents indicated they were willing to register as organ donors and 80% reported a positive general attitude towards registration. Various misconceptions about the registration and donation procedure were identified. On average only moderate knowledge levels related to organ donation were found. In order of strongest association, negative outcome expectancies, past behaviour and experience, positive outcome expectancies, and social outcome expectancies proved to be significant predictors of willingness to register as organ donors. Self-efficacy was indirectly associated with willingness via outcome expectancies. Knowledge about organ donation was not significantly associated with willingness. The results suggest that in order to persuade adolescents to register as organ donors, refutational messages will have to be developed to counterargue the prevailing negative outcome expectancies related to organ donation and registration as an organ donor.     

Potential influence structures as sources of interpersonal conflict in groups and organizations

It is argued that conflict in organizations can be interpreted, in many cases, as conflict over who is to exert influence, and that this conflict, in turn, is caused by structural incongruencies in the distribution of potential influence in groups and organizations. Potential influence is described in terms of the structural relations defined by Structural Role Theory. At the psychological level, conflict is explained as a result of incompatible expectations among people about their relative influence, their desire to protect valued roles, and to maintain a sense of freedom. The implications of the present hypothesis for specifying the range of conflict situations, the type of conflict behavior, and conflict management are explored.     

Two-voice music programming system: The PDP-9 as an automatic electronic organ

A small computer was programmed to translate two-part musical scores into tables of numbers which were then used in the execution of the music through an amplifier and loudspeaker. The objective was to create sets of tape recordings to be used in psychophysical testing of the discriminabilities and preferabilities of music played on different pitch scales. The close tolerances in the timing of events in such stimulus materials demand special programming techniques and hardware components. The working system is described, and recommendations are made concerning the main features of an improved system.     

Collective estimation: Accuracy,expertise, and extroversion as sources of intra-group influence

Although estimations typically possess correct answers, these answers may be difficult to demonstrate to others. However, providing external information may increase their demonstrability. In this experiment, individuals (N = 60) and 6-person groups (N = 360) generated estimations with or without frames of reference. We hypothesized that estimations involving frames of reference would be best fit by models predicting intra-group influence based on the accuracy of alternatives or of members in general. Conversely, we hypothesized that estimations not involving frames of reference would be best fit by models predicting influence based on member extroversion or proposal centrality. Results indicate that groups outperformed individuals and that estimations generated in the presence of frames of reference were superior to those generated in their absence. Accuracy and expertise schemes provided the best fit when frames of reference were provided, whereas an extroversion scheme provided the best fit when they were not.     

Positive and negative sources of emotional arousal enhance long-term word-list retention when induced as long as 30 min after learning

The consolidation of newly formed memories occurs slowly, allowing memories to be altered by experience for some time after their formation. Various treatments, including arousal, can modulate memory consolidation when given soon after learning, but the degree of time-dependency of these treatments in humans has not been studied. Thus, 212 participants learned a word list, which was followed by either a positively or negatively valenced arousing video clip (i.e., comedy or surgery, respectively) after delays of 0, 10, 30 or 45 min. Arousal of either valence induced up to 30 min after learning, but not after 45 min, significantly enhanced one-week retrieval. The findings support (1) the time-dependency of memory modulation in humans and (2) other studies that suggest that it is the degree of arousal, rather than valence that modulates memory. Important implications for developing memory intervention strategies and for preserving and validating witness testimony are discussed.     

Gaining knowledge via other minds: Children's flexible trust in others as sources of information

In five experiments, we examined 3‐ to 6‐year‐olds’ understanding that they could gain knowledge indirectly from someone who had seen something they had not. Consistent with previous research, children judged that an informant, who had seen inside a box, knew its contents. Similarly, when an informant marked a picture to indicate her suggestion as to the content of the box, 3‐ to 4‐year‐olds trusted this more frequently when the informant had seen inside the box than when she had not. Going beyond previous research, 3‐ to 4‐year‐olds were also sensitive to informants’ relevant experience when they had to look over a barrier to see the marked picture, or ask for the barrier to be raised. Yet when children had to elicit the informant's suggestion, rather than just consult a suggestion already present, even 4‐ to 5‐year‐olds were no more likely to do so when the informant had seen the box's content than when she had not, and no more likely to trust the well‐informed suggestion than the uninformed one. We conclude that young children who can ask questions may not yet fully understand the process by which they can gain accurate information from someone who has the experience they lack.