Accuracy of nonverbal communication as determinant of interpersonal expectancy effects

The person perception paradigm was used to address the effects of experimenters' ability to encode nonverbal cues and subjects' ability to decode nonverbal cues on magnitude of expectancy effects. Greater expectancy effects were obtained when experimenters were better encoders and subjects were better decoders of nonverbal cues and the separate contributions of experimenter's and subject's nonverbal skills were of similar magnitudes.The authors wish to express their thanks to Rena Baskin for her help.Preparation of this article and the research described was facilitated by a grant [GS-3942] from the Division of Social Sciences of the National Science Foundation to Robert Rosenthal.     

Distribution and Expected Time of Residence for U.S. Households

For risk assessments, the average current residence time (time since moving into current residence) has often been used as a surrogate for the average total residence time (time between moving into and out of a residence). Since the distributions of the two quantities are not necessarily the same, neither are their averages. Housing surveys provide current residence time data; total residence times must, therefore, be inferred. By modeling the moving process, the total residence time distribution can be estimated from current residence time data. Using 1985 and 1987 U.S. housing survey data, distributions and averages for both current and total residence times were calculated for several housing categories. The average total residence time calculated for all U.S. households, 4.6 ( se = 0.6) years, is less than half the average current residence time, 10.6 ( se = 0.1) years.     

Considering the best interests of infants in foster care placed separately from their siblings

This article offers a perspective on the child welfare practice of placing infants and their siblings in foster care using the theoretical frameworks of attachment and infant mental health. The authors highlight issues for child welfare workers to consider when determining if moving an infant or young child from one home to another for the purpose of placing him with his siblings would cause trauma or disruption; and also issues to consider when determining the infant or young child's best interest when separated from siblings. First, the authors summarize the literature regarding attachment relationships and attachment disruptions. Then, they review outcome studies of children residing in foster care who are placed with their siblings and of those who are placed separately. Finally, the authors conclude with specific recommendations for child welfare workers to aid in making such difficult decisions about placing infants in foster care.     

The effects of temperature on human fertility

Monthly birth and temperature data for a variety of states and countries are used to estimate the effect of short-run temperature fluctuations on fertility. Regressions of monthly births on a flexible specification of lagged monthly temperature show that temperature has quantitatively important effects on both seasonal and nonseasonal variation in births. Summer temperature extremes reduce conceptions in the southern United States, explaining a substantial part of the observed seasonal birth pattern. Extreme cold shows no evidence of affecting conceptions. The results also show significant seasonality in births even after accounting for temperature. Controls for monthly temperature do not explain the persistent spring peak in births in northern Europe. This finding suggests that other factors play an important role.     

On the meaning and implications of facial prominence

Archer et al. (1983) found that visual depictions (e.g., photographs) of men tend to show more face and less of the body (a characteristic that was termed high face-ism) than visual depictions of women. Furthermore, photographs (of both men and women) high in face-ism elicited more favorable impressions than photographs low in face-ism. The present studies examined possible reasons for sex differences in face-ism and their implications concerning the effects of high and low face-ism on interpersonal perception. Study 1 showed that the greater face-ism in photographs of men was less pronounced when the photographs were taken from periodicals that are oriented toward women's issues. Study 2 showed that photographs high in face-ism received higher ratings on dominance, a dimension related to masculinity, but not on positivity, a dimension related to femininity. This study also indicated that facial expressions provided more information about degrees of positivity while body cues provided more information about dominance and submission. Consistent with these latter results, Study 3 showed that amateur drawings portraying kind or hostile persons showed more of the face while drawings presenting dominant or weak persons showed more of the body. The two phenomena—the relationship of high face-ism with impressions of high dominance and the different types of information transmitted by the face and body—were considered in the discussion.The author would like to express his appreciation to Diana R. Satin and BiancaMaria (Mia) Penati for their assistance with this project.     

The Endowment Effect on Academic Chores Trade-Off (ACTO)

The present study aimed to investigate three questions concerning Kahneman’s Endowment Effect. (a) Does the Endowment Effect apply to negotiations on intangible items such as intellectual resources and time invested in academic chores? (b) Does the sequence in which proposals are presented to the negotiators influence the Endowment Effect and, if so, how? (c) Does the Endowment Effect have the same impact in on-going negotiations as in one-shot negotiations? The investigation focused on the trade-off made by students between advanced courses and seminars, which we term as Academic Chores Trade-Off (ACTO). The results indicated the existence of the Endowment Effect in negotiations on the above intangible items (ACTO) but could also be partially interpreted as reflecting the negotiators attempts to improve their positions. The results also supported the existence of a Sequence Effect combined with an intensification of the Endowment Effect. The Endowment Effect in on-going negotiations was not found to be significantly different from that in the one-shot format.     

The effect of nonverbal sensitivity on social interaction

This study examined the relation between decoding ability and quality of dyadic interaction of college roommate pairs. It was found that pairs with members who were both high in decoding (HH pairs) rated their interactions somewhat more positively than pairs in which one or both roommates were low (HL and LL pairs). This effect was more pronounced for ratings reflecting emotional sharing (e.g., gave and received support) than for ratings reflecting influence (e.g., initiated the interaction). For emotional sharing only, the difference between the HH pairs and the HL plus LL pairs was significant. The relative advantage of the HH pairs in emotional sharing and relative disadvantage in influence was more pronounced for males and less for females, suggesting a reversal of traditional sex-role behavior. When differences in decoding ability within roommate pairs were considered, the results showed that, in dyads with at least one good decoder (HH and HL pairs), the interaction was rated more positively by the roommate who was lower in decoding ability. The concept and measure of decoding ability and their implications for interaction and sex-role behavior were discussed.This research was supported in part by NIMH Grant # R01 MH 40498 to Miron Zuckerman.     

Nonverbal strategies for decoding deception

This study tested the hypothesis that judges who suspect deception would be less influenced by controllable channels (facial expresions) relative to leaky channels (voice and body) than judges who do not suspect deception. The Nonverbal Discrepancy Test, comprised of video (face or body) cues paired with audio cues, was administered to subjects with the information that the person shown in the test never lied, sometimes lied, or very often lied; in a fourth condition (control) there was no mention of deception. In some cases, the video and audio components of the discrepancy test depicted the same affect while in other cases they depicted different affects. Subjects who expected more deception were relatively less influenced by the facial component of the affectively discrepant video-audio pairings. These subjects were also less accurate at decoding affectively consistent videoaudio pairings, especially those involving facial cues. Finally, subjects who expected more deception became less accurate decoders of consistent video-audio pairings during the second half of the test but learned to recognize video-audio discrepancies better. The results suggest that suspicion of deception led subjects to discount facial cues. Results for the control group indicated that even in the absence of explicit information, discrepant messages create a suspicion of deception.Preparation of this paper was supported in part by the National Science Foundation.     

Multiseason transmission for Rift Valley fever in North America

ABSTRACT

Rift Valley fever is a vector-borne disease, primarly found in West Africa, that is transmitted to humans and domestic livestock. Its similarities to the West Nile virus suggest that establishment in the developed world may be possible. Rift Valley fever has the potential to invade North America, where seasons play a role in disease persistence. The values for the basic reproductive number show that, in order to eradicate the disease, the survival time of mosquitoes must decrease below 8.67 days. Mechanisms such as aggressive spraying that decreases the mosquito population can contain an outbreak. Otherwise, Rift Valley fever is likely to establish itself as a recurring seasonal outbreak. Rift Valley fever poses a potential threat to North America that would require aggressive interventions in order to prevent a recurring seasonal outbreak.     

Education for all – but not Hong Kong’s ethnic minority students

School participation rates in Hong Kong are acknowledged to be high but not always for the city’s ethnic minority students. Case study was used to portray the ‘out of school’ phenomenon for ethnic minority students at a secondary school in Hong Kong through the experiences of one such ethnic minority student. Morshed, a Pakistani student, participated with the researchers in an unstructured in-depth interview. In addition, interviews were also conducted with the principal, two teachers, and one support staff from the school. The study showed the complex interaction of school contexts and personal life issues that influenced Morshed’s dropping out of school. Implications are drawn for providing better school support that can facilitate more positive schooling experiences for Hong Kong’s ethnic minority students.