Determinants of information-seeking behavior

Two studies examined situational determinants of choice among anagram tests that varied both in difficulty and in diagnosticity (the information they provided about one's own ability). In both studies, subjects worked on a preliminary anagram test before making their choices. Study 1 manipulated level of performance on the preliminary test. Results showed that high performance led to preferring more difficult and more diagnostic tests. In Study 2, subjects were either paid or not paid for their performance on the preliminary test. Results showed that pay led to a preference for more diagnostic tests. Unexpectedly, results of both studies showed that although difficulty and diagnosticity were defined independently of one another, they were not perceived as such. Thus, high diagnostic tests were perceived as more difficult; more difficult tests were perceived as more diagnostic; and the difference between high and low diagnostic tests in perceived diagnosticity and choice of items (high diagnostic tests had higher scores on both measures) were more pronounced among more difficult tests. Motivational as well as cognitive interpretations of the results were discussed.     

Stochastic properties of binocular rivalry alternations

The extent to which binocular rivalry phases are sequentially related was assessed by theν statistic and by autocorrelation. Both measures indicate that the duration of successive phases are independent. The frequency distributions of suppression phases and of nonsuppression phases can be fitted by gamma distributions. These results are consistent with models of the rivalry process that incorporate independence assumptions.     

Interference and negative priming from ignored distractors: The role of selection difficulty

The relation between distractor interference and negative priming from identical distractors was examined in two experiments. Subjects responded to a target letter, which was indicated by an adjacent bar marker, and attempted to ignore a distracting letter. Onprime trials, distracting letters were either compatible or incompatible with the target, allowing for a measure of interference. On subsequentprobe trials, previously ignored distractors were sometimes presented as targets, allowing for a measure of negative priming. Reducing the spatial separation between targets and distractors on the prime trial increased the magnitude of interferenceand negative priming, but these effects appeared to be independent of each other (Experiment 1). In Experiment 2, the prime target location was precued on some trials, but not on others. Precuing attenuated the magnitude of interference, but not that of negative priming effects. This pattern indicates that measures of negative priming and measures of distractor interference on the immediately preceding trial are independent. The results are discussed in terms of a selective inhibition model of selective attention.     

Maternal depressed mood and stress as related to vigilance,self-efficacy and mother-child interactions

Parenting self-efficacy, maternal vigilance, competence and child behaviour were studied in a community sample of mothers of 18-36-month-old children. Thirty dysphoric mothers had elevated Beck Depression Inventory (BDI) scores (12–16) and 30 nondysphoric mothers had BDIs <5. Dysphoric mothers were more stressed, less happily married, less effective as parents and described their children as less competent and responsive than did non-dysphoric mothers. When completing a distracting questionnaire task, all mothers were less vigilant and their children less well behaved than during free play. Stressed, dysphoric mothers were observed to be less sensitive, responsive, warm, vigilant and effective in controlling their children, and their children were more destructive, and less happy, responsive and compliant. Combined maternal stress and dysphoria were associated with generally negative perceptions of self and child, and negative mother-child interactions.     

Lesbian motherhood and genetic choices

Rhonda, a physician, and Clara, a registered nurse, have been lovers for the past 7 years. Both women are in their 30s, in good health, and financially stable. Clara has contacted Dr. Robinson, a highly regarded obstetrician and geneticist, with an unusual request. Clara is seeking to become pregnant by means of in vitro fertilization (IVF) with an embryo transfer (ET) technology. She proposes being implanted with ova harvested from her partner, Rhonda, and fertilized in vitro with donor sperm from a local medical-school sperm bank. Dr. Robinson explains the relatively low success rate involved in IVF and ET techniques and suggests artificial insemination of Clara's own ova. Clara and Rhonda understand the low success rates but are undeterred. Their mutual goal is not merely to have a child but to share in the maternity of their children. What ethical issues are raised by the plan Clara and Rhonda propose? What are Dr. Robinson's ethical responsibilities with respect to the request by Clara and Rhonda?     

"An ignoble form of cannibalism": reflections on the Pittsburgh protocol for procuring organs from non-heart-beating cadavers

The author discusses the ways in which she finds the University of Pittsburgh Medical Center protocol for procuring organs from "non-heart-beating cadaver donors" medically and morally questionable and irreverent. She also identifies some of the factors that contributed to the composition of this troubling protocol, and to its institutional approval.     

Effects of stress on recall

Subjects in experimental conditions were exposed to a traumatic autopsy colour slide (labelled either as of New York Police Department (NYPD) or MGM studio origin) embedded in a neutral series of travel scenes, while control subjects saw a neutral target. Subjects in the high-stress condition showed a significant decrease in memory for neutral slides which followed the NYPD-labelled traumatic stimulus (p < 0.001). Results support evidence in the eyewitness memory field which indicate reduced recall under elevated levels of stress.