The role of beneficence in clinical genetics: Non-directive counseling reconsidered

The popular view of non-directive genetic counseling limits the counselor's role to providing information to clients and assisting families in making decisions in a morally neutral fashion. This view of non-directive genetic counseling is shown to be incomplete. A fuller understanding of what it means to respect autonomy shows that merely respecting client choices does not exhaust the duty. Moreover, the genetic counselor/client relationship should also be governed by the counselor's commitment to the principle of beneficience. When non-directive counseling is reexamined in light of both these principles, it becomes clear that there are cases in which counselors should attempt to persuade clients to reconsider their decisions. Such attempts are consistent with non-directive counseling because, while respecting the clients' decision-making authority, they insure that clients act with full knowledge of the moral consequences of their decisions.     

The effects of reducing teacher questions and increasing pauses on child talk during morning news

The effects of reducing teacher questions and increasing pauses on student talk during morning news sessions were investigated. The length of student discourse was observed during random 10-min samples of the lesson, together with frequency counts of teacher questions and pauses. Concomitant measures of teacher praise, directives, control statements and student call-outs were also obtained. Within the constraints of a within-subjects reversal design (ABAB), experimentally reducing teacher questions and replacing these with pauses and/or topic-related statements was associated with an increase in child discourse. Teacher praise and directives did not systematically alter across experimental phases but both teacher control statements and child call-outs reduced during the intervention phases. Reducing teacher questions and increasing the use of pauses by the teacher was associated with increases in student discourse without adversely affecting classroom behavior. These results support the hypothesis that teacher questions foil pupil talk in morning news thereby obstructing the pedagogical value of these sessions.     

Use it or lose it: engaged lifestyle as a buffer of cognitive decline in aging?

Data from the Victoria Longitudinal Study were used to examine the hypothesis that maintaining intellectual engagement through participation in everyday activities buffers individuals against cognitive decline in later life. The sample consisted of 250 middle-aged and older adults tested 3 times over 6 years. Structural equation modeling techniques were used to examine the relationships among changes in lifestyle variables and an array of cognitive variables. There was a relationship between changes in intellectually related activities and changes in cognitive functioning. These results are consistent with the hypothesis that intellectually engaging activities serve to buffer individuals against decline. However, an alternative model suggested the findings were also consistent with the hypothesis that high-ability individuals lead intellectually active lives until cognitive decline in old age limits their activities.     

Scripts and checkerboards: The influence of ordered visual information on remembering locations in infancy

Five-month-old infants were trained to fixate 4 event locations, and memory for sequential locations was assessed following training. Results of two studies reveal that ordered visual information influences young infants' memory for sequential events.     

Prior experience and complex procedures

The role of prior knowledge in learning complex procedures was investigated in a transfer task in which subjects learned two related procedures in sequence. In Experiment 1, we manipulated the conceptual and structural similarity between the two procedures; in Experiment 2, we manipulated whether the order of the steps within subprocedures was the same or different during training and transfer, or whether the order of the subprocedures was the same or different. The results lead us to hypothesize that transfer in complex procedures is mediated primarily by a memory for specific steps rather than by conceptual understanding or problem solving. In particular, we were able to model the results precisely on the assumption that subjects use superficial similarity to retrieve the sequences of steps needed to perform segments of the procedure.     

Intraindividual change in text recall of the elderly.

Patterns of change and variability in text recall performance were assessed in seven elderly women by testing them weekly for up to 2 years. Results showed markedly different patterns of intraindividual change in gist recall performance for different participants. The two women whose performance declined were characterized by deteriorating physical health. Texts having female protagonists yielded superior recall performance. There was significant intraindividual variability after adjustment for text effects, which may indicate that weekly fluctuations in psychological states of the participants influenced their memory performance.     

Short-term longitudinal change in cognitive performance in later life.

Changes in mean performance on memory, information processing, and intellectual ability tasks over a 3-year period were examined. The sample consisted of 328 community-dwelling men and women (from an original sample of 484 individuals) aged 55-86 years. Ss completed tasks yielding measures of verbal processing time, working memory, implicit memory, vocabulary, verbal fluency, world knowledge, reading comprehension, word recall, and text recall. The results showed significant average decline on working memory, verbal fluency, and world knowledge. There were also interactions for 2 processing time measures and working memory, showing greater decline in the earlier-born cohort group than in the later-born cohort group. A step-down analysis revealed that covarying declines in other variables, including processing time, did not eliminate significant declines in working memory, verbal fluency, and world knowledge.     

On the nature of the span of apprehension

Summary Typically, people can only report about four or five items from a briefly presented array of alphanumeric items. A new span task was used to explore the basis of this limitation. In Experiment l, performance suffered when very brief display durations were combined with a verbal-load task, but no significant effects of display duration were found when there was no verbal load. In Experiment 2, a similar interaction was observed between verbal load and the presence of a visual suffix; performance was worse in the verbal-load condition with a visual suffix, but no such effect was observed without verbal load. In both experiments, poorer performance was associated with enhanced serial-position effects. The results can be explained on the assumption that the verbal-load task required some processing resources, and that the quality of information in visual working memory depends on available resources. Thus, both brief-array presentation and the visual suffix degrade the information in visual working memory, but span performance is impaired only when processing resources are relatively scarce.     

The promise of object-oriented programming

Object-oriented programming may provide a way in which programs for running experiments can be created with a minimum of effort without sacrificing flexibility or generality. In this approach, a new experiment is created by defining descendents of an object hierarchy that “inherit” most of the behavior common to some general paradigm, but “override” the methods that are specific to the new experiment. An object hierarchy for implementing common cognitive psychology paradigms is described as an illustration.