Disgust sensitivity and attitudes toward organ donation among African-American college students.

241 African-American college students (94 men and 147 women, mean age = 20.3 +/- 3.4 yr.) completed the 1994 Disgust Scale of Haidt, McCauley, and Rozin and a modified form of Parisi-Rizzo's 1987 Attitudes Toward Organ Donation Scale (negative subscale only) as well as a behavioral measure of intention to donate organs after death. Analyses indicated that the higher the disgust sensitivity, the more negative the attitude toward organ donation and the less likely the student was to indicate intent to donate organs. It was further shown that negative attitudes toward organ donation mediated the relationship between disgust sensitivity and the behavioral intention measure. Results highlight the complexity of the issues surrounding organ donation within an African-American population and provide additional empirical evidence for the development of a theoretical model to explain the organ donation phenomenon.     

On the heritability of inspection time and its covariance with IQ: a twin study

Using the classical twin design, this study investigates the influence of genetic factors on the large phenotypic variance in inspection time (IT), and whether the well established IT–IQ association can be explained by a common genetic factor. Three hundred ninety pairs of twins (184 monozygotic, MZ; 206 dizygotic, DZ) with a mean age of 16 years participated, and 49 pairs returned approximately 3 months later for retesting. As in many IT studies, the pi figure stimulus was used and IT was estimated from the cumulative normal ogive. IT ranged from 39.4 to 774.1 ms (159±110.1 ms) with faster ITs (by an average of 26.9 ms) found in the retest session from which a reliability of .69 was estimated. Full-scale IQ (FIQ) was assessed by the Multidimensional Aptitude Battery (MAB) and ranged from 79 to 145 (111±13). The phenotypic association between IT and FIQ was confirmed (−.35) and bivariate results showed that a common genetic factor accounted for 36% of the variance in IT and 32% of the variance in FIQ. The maximum likelihood estimate of the genetic correlation was −.63. When performance and verbal IQ (PIQ & VIQ) were analysed with IT, a stronger phenotypic and genetic relationship was found between PIQ and IT than with VIQ. A large part of the IT variance (64%) was accounted for by a unique environmental factor. Further genetic factors were needed to explain the remaining variance in IQ with a small component of unique environmental variance present. The separability of a shared genetic factor influencing IT and IQ from the total genetic variance in IQ suggests that IT affects a specific subcomponent of intelligence rather than a generalised efficiency.     

Effects of early institutionalization on the development of emotion processing: a case for relative sparing?

We tested the capacity to perceive visual expressions of emotion, and to use those expressions as guides to social decisions, in three groups of 8‐ to 10‐year‐old Romanian children: children abandoned to institutions then randomly assigned to remain in ‘care as usual’ (institutional care); children abandoned to institutions then randomly assigned to a foster care intervention; and community children who had never been institutionalized. Experiment 1 examined children's recognition of happy, sad, fearful, and angry facial expressions that varied in intensity. Children assigned to institutional care had higher thresholds for identifying happy expressions than foster care or community children, but did not differ in their thresholds for identifying the other facial expressions. Moreover, the error rates of the three groups of children were the same for all of the facial expressions. Experiment 2 examined children's ability to use facial expressions of emotion to guide social decisions about whom to befriend and whom to help. Children assigned to institutional care were less accurate than foster care or community children at deciding whom to befriend; however, the groups did not differ in their ability to decide whom to help. Overall, although there were group differences in some abilities, all three groups of children performed well across tasks. The results are discussed in the context of theoretical accounts of the development of emotion processing.     

Different is good: connectionism and dynamic systems theory are complementary emergentist approaches to development

Connectionist and dynamic systems approaches to development are similar in that they are both emergentist theories that take a very different perspective from more traditional symbolic systems. Moreover, they are both based on similar mathematical principles. Nevertheless, connectionism and dynamic systems differ in the approach they take to the study of development. We argue that differences between connectionist and dynamic systems approaches in terms of the basic components of the models, what they see as the object of study, how they view the nature of knowledge and their notions of developmental change mean that they each stand to make different and unique contributions to a more complete theory of development. We present an example from our work on how children learn to learn words that illustrates the complementary nature of connectionist and dynamic systems theories.     

Misremembering colostomies? Former patients give lower utility ratings than do current patients.

Community members often evaluate health conditions more negatively than do the patients who have them. The authors investigated whether experience with a health condition reduces this discrepancy by surveying colostomy patients by mail (n = 195), some of whom (n = 100) had their colostomies reversed and normal bowel function restored. The authors also surveyed a community sample recruited via the Internet (n = 567). They then compared all 3 groups' utility value for life with a colostomy by using the time trade-off utility measure and by examining ratings of current quality of life. Despite having direct experience with the health condition, former colostomy patients provided much lower utility valuations than did current patients. In fact, their valuations were similar to those given by a community sample. Rather than accurately remembering their actual experiences with colostomies, the former patients may have applied a theory of how colostomies had influenced their lives; this is consistent with other research on theory driven recall bias.