Empathic accuracy in a clinically relevant setting.

This study addressed 3 questions regarding empathic accuracy in a clinically relevant setting. First, does the empathic accuracy of a perceiver improve with increased exposure to a target individual? Second, can empathic accuracy be enhanced by providing the perceiver with feedback about the target's actual thoughts and feelings? Third, are there stable individual differences in empathic accuracy that generalize across different targets? The results indicated that although absolute performance levels varied from 1 target to another, empathic accuracy generally improved with increased exposure to the target. In addition, feedback concerning the target's actual thoughts and feelings accelerated the rate at which the perceivers' empathic accuracy improved. Finally, cross-target consistency in responding (α?=?.86) revealed stable individual differences in the perceivers' empathic ability. Implications of these findings for clinical training and practice are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Compositions in Black and White: Determinants of interaction in interracial dyads.

Examined the initial, unstructured interactions of 40 interracial (Black–White) dyads in which 3 factors were systematically varied. These factors were the disposition of the White dyad members to either seek out or shun interaction with Blacks, the race (Black vs White) of the experimenter, and the gender composition (male–male vs female–female) of the dyads. Results show that within dyads, White dyad members displayed more interactional involvement than their Black partners but experienced the interactions as more stressful and uncomfortable. Whites predisposed to avoid interaction with Blacks looked and smiled at their partners less than those predisposed to initiate interaction. Both Black and White members of these avoidance dyads reported heightened feelings of anxiety and concern about their interactions, but the moderating influences of the Whites' approach–avoidance dispositions on interaction behavior were essentially limited to conditions in which the experimenter was Black and the White S was a "solo minority." It is suggested that Black–White partner effects are attributable to differing amounts of cross-race contact typically experienced by Blacks and Whites. Black–White experimenter effects are interpreted in terms of S. E. Taylor's (1981) hypothesis that stereotypes and related dispositions are activated in social contexts in which group membership is made salient. (38 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Long-term recovery of PCB-contaminated sediments at the Lake Hartwell superfund site: PCB dechlorination. 1. End-member characterization

Under anaerobic conditions, such as those typically found in buried sediments, the primary metabolic pathway for polychlorinated biphenyls (PCBs) is reductive dechlorination in which chlorine removal and substitution with hydrogen by bacteria result in a reduced organic compound with fewer chlorines. Vertical sediment cores were collected from Lake Hartwell (Pickens County, SC) and analyzed in 5-cm intervals for 107 PCB congeners in a total of more than 280 samples from 18 sediment cores and surface samples. This paper reports on extensive PCB dechlorination measured in Lake Hartwell sediments and the characterization of dechlorination end-member (EM) patterns using chemical forensic methods. PCB congener fingerprinting and a multivariate receptor modeling method, polytopic vector analysis (PVA), were used for identification and characterization of weathered and dechlorinated PCB congener patterns. Dechlorination resulted in a substantial shift in buried sediments from tetra- through decachlorobiphenyl congeners to mono- through trichlorobiphenyl congeners. Mono- through trichlorobiphenyls comprised approximately 80% of the PCBs in buried sediments that underwent maximum dechlorination as compared to approximately 20% in surface sediments. The major concentration decreases were seen in the tetra- through hexachlorobiphenyl homologues, which accounted for over 90% of the dechlorination. Octa- through decachlorobiphenyl congeners also were dechlorinated, but their overall contribution to dechlorination was relatively small due to their low initial concentrations (< 5%). The net accumulation of 2-CB, 2,2'/2,6-DCBs, 2,4'-DCB, 2,2',4-TCB, and 2,2',6-TCB at Lake Hartwell matched characteristic PCB dechlorination products reported in the literature, such as those for Processes M, Q, and C; and the persistence of tetrachlorobiphenyls (TeCBs) that contained 24- and 25-congener groups resembled dechlorination Processes H or H'. Although dechlorination tended to be very extensive in most of the cores, it was not always consistent from core to core or at various depth intervals within a single core. The reason for this variability in dechlorination extent could not be determined from the existing data and did not appear to correlate with such factors as PCB concentration, total organic carbon, or age. The authors used fingerprinting analysis and a PVA multivariate receptor model as exploratory data analysis tools to characterize PCB sources and their alteration patterns. Dominant sources and alteration patterns were determined in this large data set by comparing PVA EM patterns with known source patterns (i.e., Aroclors or Aroclor mixtures) and literature-reported alteration patterns. PVA also afforded an opportunity to characterize the vertical and lateral distributions of the weathered and unweathered PCB source patterns and dechlorination patterns, a task that would have been much more difficult to accomplish through comparison of chromatograms alone.     

When Accuracy Hurts, and When It Helps: A Test of the Empathic Accuracy Model in Marital Interactions.

This study tested predictions from W. Ickes and J. A. Simpson's (1997, 2001) empathic accuracy model. Married couples were videotaped as they tried to resolve a problem in their marriage. Both spouses then viewed a videotape of the interaction, recorded the thoughts and feelings they had at specific time points, and tried to infer their partner's thoughts and feelings. Consistent with the model, when the partner's thoughts and feelings were relationship-threatening (as rated by both the partners and by trained observers), greater empathic accuracy on the part of the perceiver was associated with pre-to-posttest declines in the perceiver's feelings of subjective closeness. The reverse was true when the partner's thoughts and feelings were nonthreatening. Exploratory analyses revealed that these effects were partially mediated through observer ratings of the degree to which partners tried to avoid the discussion issue. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

When the head protects the heart: Empathic accuracy in dating relationships.

This study investigated circumstances in which romantic partners may be motivated to inaccurately infer each other's thoughts and feelings. Dating couples rated and discussed pictures of opposite-sex people with whom they might later interact in a dating context. Couples evaluated either highly attractive persons or less attractive persons. As predicted, dating partners who were close, who were insecure about their relationship, and who evaluated highly attractive opposite-sex persons displayed the least empathic accuracy when they tried to infer each other's actual thoughts and feelings from the videotape of the rating and discussion task. The effects of these variables were additive, and they were mediated by the degree of perceived threat to the relationship. Theoretical implications of these findings are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A fibre-optic UV system for H2SO4 production in aerosol chambers causing minimal thermal effects

A novel fibre-optic UV illumination system for sulphuric acid (H₂SO₄) production has been developed. The illumination system described in this paper provides sufficient ultraviolet light (UV) power while causing practically no thermal effect on the aerosol chamber (temperature variation <0.005 °C at full UV illumination). A similar thermal stability has not been achieved in other comparable experimental set-ups so far. The spectrum provided by the fibre-optic UV system corresponds to the UVB region, illuminates the chamber in a reasonably uniform way and is comparable to the ground level actinic flux. The UV system has been installed for the Cosmics Leaving OUtdoor Droplets (CLOUD) chamber experiments at CERN. Precise, easily-adjustable and reproducible concentrations of H₂SO₄ were generated by adjusting the UV light intensity. This paper gives an overview on the design of this new system as well as insights on its performance and application.     

On the social advantages of having an older, opposite-sex sibling: Birth order influences in mixed-sex dyads.

Examined the influences of birth order on behavior occurring in the initial, unstructured interactions of 40 mixed-sex dyads composed of a male and a female undergraduate who each had a sibling of the opposite sex. The design contrasted 4 dyad types: (a) a firstborn man paired with a firstborn woman, (b) a firstborn man paired with a last born woman, (c) a last born man paired with a firstborn woman, and (d) a last born man paired with a last born woman. Each pair of Ss was videotaped during their 5-min initial meeting. Ss then completed questionnaires about the interaction. Results indicate that Ss with an older, opposite-sex sibling were particularly likely to have rewarding interactions with strangers of the opposite sex. Relative to firstborn men, last born men talked nearly twice as long, asked more questions, and evoked more gazes, verbal reinforcers, and self-reported liking from their female partners. Relative to firstborn women, last born women were more likely to initiate the interaction and to exceed the rate at which their male partners smiled. (64 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)