A Population-Based Twin Study of Parentally Reported Tactile and Auditory Defensiveness in Young Children

  Some adults and children exhibit defensive behaviors to tactile or auditory stimulation. These symptoms occur not only in subsets of children with ADHD, autism, and Fragile X syndrome, but also in the apparent absence of accompanying disorders. Relatively little research explores the correlates and antecedents of sensory defensiveness. Using a population-based sample of 1,394 toddler-aged twins, mothers reported on tactile and auditory defensiveness, temperament, and behavior problems. The incidence of defensive symptoms was widely distributed, with some accumulation of cases in the extreme range. Girls were overrepresented in the extreme tactile defensiveness group. Both auditory and tactile defensiveness were modestly associated with fearful temperament and anxiety, but they were relatively distinct from other common dimensions of childhood behavioral dysfunction. Twin correlations for the full range of scores and concordance rates for the extremes suggested moderate genetic influences, with some indication that the tactile domain might be more heritable than the auditory domain.     

The retrieval of controlled and automatic aspects of meaning on direct and indirect tests

The literature concerning implicit memory presents conflicting evidence on the importance of meaning in recovering recently studied words. When the same cues are used during testing, indirect instructions reduce levels of processing effects relative to those obtained with direct instructions, suggesting that meaning is not as likely to be retrieved on indirect tests. However, with certain cues, meaning set size of the studied words affects performance even under indirect instructions, suggesting that meaning is retrieved on such tests. The purpose of the present experiments was to resolve this apparent inconsistency. In Experiment 1, the effects of levels of processing and meaning set size were evaluated under direct and indirect test instructions, with the use of stem and word-fragment cues. In other experiments, beginning and ending stem cues were compared, and levels, set size, and instructional effects were evaluated using meaning cues. The findings indicated that levels effects were determined more by test instructions than by test cues, and that set size effects were determined more by test cues than by test instructions. Implications are discussed for transfer-appropriate processing viewpoints and for a model in which it is assumed that performance is determined by searching either explicit or implicit memories.     

Clinical teaching: The difficulty of learning

Physicians-in-training face major barriers to effectively learning both the technical and artistic sides of medicine. In both hospital and office settings, inadequate attention has been paid to the context and work environment for learning. The system of care itself is one of the major teachers of the practice of medicine; it must be optimized to produce maximal learning.     

Inviting witnesses to speculate: effects of age and interaction on children's recall

Inviting speculation has been found to increase children's false recall. In this study, kindergartners and third graders saw a clown perform actions alone or in interaction with a child. Two weeks later, the speculation group recalled all actions and was asked to speculate on half the actions. The control group recalled all actions without speculating. Four weeks after the show, all children recalled all actions again. The speculation group gave more false answers to the speculated items than the control group. Surprisingly, older children tended to report as many if not more false responses than younger children, regardless of speculation. In the speculation group, there were fewer false answers for interactions than actions, but false answers did not differ across observation types in the control group. Finally, speculation did not affect free and cued recall differentially.     

Effects of target set sizeon feelings of knowing and cued recall: Implications for the cue effectiveness andpartial-retrieval hypotheses

Target set size refers to the number of preexisting connections a studied word has to closely related concepts in long-term memory. The purpose of this investigation was to determine whether target set size influences feeling-of-knowing (FOK) ratings. The results showed that ratings were higher for targets connected to smaller sets, as compared with those connected to larger sets. Comparable effects were obtained with the use of different encoding strategies, including concreteness classifications and vowel naming, and with both meaningfully and phonologically related test cues. These findings indicate that FOKsare sensitive to competition between concepts linked to the target and that this sensitivity is independent of encoding strategy and type of test cue. Response time measures indicated that FOKs are sensitive to competition that arises when concepts are activated in parallel, whereas recall is more sensitive to competition that arises during sampling associated with search. Implications for various cue-based and target-based explanations of FOK effects are discussed.     

WHEN MORE PAIN IS PREFERRED TO LESS:

Abstract— Subjects were exposed to two aversive experiences: in the short trial, they immersed one hand in water at 14°C for 60 s; in the long trial, they immersed the other hand at 14°C for 60 s, then kept the hand in the water 30 s longer as the temperature of the water was gradually raised to 15°C, still painful but distinctly less so for most subjects. Subjects were later given a choice of which trial to repeat. A significant majority chose to repeat the long trial, apparently preferring more pain over less. The results add to other evidence suggesting that duration plays a small role in retrospective evaluations of aversive experiences; such evaluations are often dominated by the discomfort at the worst and at the final moments of episodes.     

Knowledge is not everything: analysis of children's performance on a haptic comparison task

The relative effects of developmental level and domain-specific knowledge on children's ability to identify and make similarity decisions about object concepts based only on haptic (touch) information were investigated. Children aged 4-9 years with varying levels of dinosaur knowledge completed a cross-comparison task in which they haptically explored pairs of familiar (dinosaur) and unfamiliar (sea creature) models that varied in terms of their degree of differentiability. Older children explored models more exhaustively, found more differentiating features and consequently made fewer errors than younger children did. High knowledge enabled children to identify models correctly, but was also associated with the use of a hypothesis testing strategy, which led children to make greater numbers of "miss" errors on the cross-comparison task. Performance in the control domain illustrated that the hypothesis testing strategy was specific to the high knowledge domain. Potential explanations for the role of knowledge and development in haptic exploration are considered.     

Personality disorders and dimensions in pathological gambling

Comorbid DSM-IV Axis II personality disorders appear to be common in pathological gambling (PG) and may contribute to the chronic problems often associated with the disorder. This study sought to examine the relationship between PG, personality disorders, and impulsivity in a sample of pathological gamblers. Personality assessments included the SCID-II, Eysenck Impulsiveness Questionnaire, Tridimensional Personality Questionnaire, and Barratt Impulsiveness Scale. A total of 77 individuals with DSM-IV PG were included in this study, of which 35 (45.5%) met criteria for at least one personality disorder. Specific aspects of impulsivity were associated with certain personality disorders in PG when grouped by cluster, yet the presence of a personality disorder was not positively correlated with gambling severity. It remains unclear how the presence of a personality disorder and aspects of impulsivity may affect treatment outcome. Further exploration of these disorders and dimensions of personality may encourage a more inclusively global treatment approach.     

Challenges in Transforming Military Training: Research and Application of Advanced Simulation and Training Technologies and Methods

This study addresses the need to validate estimates of cross-job retraining times against measures of actual retraining success. Specialty-level cross-job retraining time estimates were computed for 43 U.S. Air Force (USAF) enlisted specialties. The estimates were based on profiles of mean subject- matter-expert ratings of months to proficiency across 26 task categories. Individual-level criteria indicating previous job skill utilization, current skills and abilities, and current job performance were obtained from a separate study conducted 10 years earlier. Results were supportive: Correlations between retraining time estimates and performance criteria were negative and statistically significant. Future research needs and potential applications of retraining time estimates are discussed.