Adult-child interaction during invasive medical procedures.

Adult-child interactions during stressful medical procedures were investigated in 43 pediatric patients videotaped during a venipuncture procedure in the course of cancer treatment. Relations among six adult behavior categories (explain, distract, command to engage in coping behavior, give control to the child, praise, and criticize/threat/bargain) and three child behavior categories (momentary distress, cry/scream, and cope) were examined using correlational and sequential analysis. Results indicated that adult distraction resulted in increased child coping and reduced momentary distress and crying. Adult explanations, although a likely response to child distress and crying, did not result in a reduction of these behaviors. Attempts to give the child control reduced child crying. Implications for clinical interventions during painful medical procedures are discussed.     

The ratio principle holds over a million-to-one range of illumination

Infant sensitivity to kinetic information specifying three-dimensional object shape was assessed using computer-generated random-dot displays. Four-month-old infants were habituated to displays of an object oscillating about two different axes on alternating trials. Following habituation, the infants were tested for recovery from habituation to a display of the same object and a novel object. Both test displays employed a new axis of rotation. The infants generalized habituation to the same object and increased their looking to the new object. These results provide evidence that infants are sensitive to motion-carried information specifying three-dimensional object shape, since the random-dot displays minimized static information that differentiated the two objects. These findings suggest that, at least by 4 months of age, infants can detect subtle differences in shape from purely kinetic information.     

How much and how fast: rapid processing of spoken language in later adulthood

Speech processing involves rapid decoding and construction of meaning from a transitory acoustic signal. Because older adults have been found to be slower in performing many cognitive tasks, we hypothesized that they may have difficulty in immediate recall for speech of increasing input rate. Two experiments are reported in which both older and younger participants listened to and immediately recalled sentences that were systematically varied in speech rate and number of propositions. Although recall performance of the older adults showed a disproportionate decline when speech rate was increased, older adults, as well as the younger adults, were able to recall sentences of increasing propositional densities. We also found that the tendency to recall a greater proportion of main ideas than details (the levels effect) was enhanced by increased propositional density, and depressed by increased speech rate and increased age. These results are discussed in terms of an age-related change in the rate at which information can be processed in working memory.     

Exploration of a Marital Typology: Implications for Marital Functioning in a Multi-Ethnic Sample

Marital conflict is associated with multiple negative outcomes for couples, including marital dissatisfaction and divorce. Little research, however, has examined conflict in Hispanic/Latino couples or its association with marital satisfaction, which creates an unfortunate knowledge gap for clinicians working with diverse client groups. The present study sought to examine both marital conflict and satisfaction using a sample of 231 European American (EA; n = 108) and Hispanic/Latino (H/L; n = 123) couples. Through observational coding, couples were placed into four groups based on their type of conflict management strategies: Harmonious, Withdrawn, Conflictual-Expressive, or Conflictual-Hostile. For both ethnic groups, couples in the Harmonious group were nondistressed and couples in the Conflictual-Hostile group were in the distressed range of marital satisfaction. Cross-ethnic differences emerged. EA couples experienced distress when both hostile (Conflictual-Hostile) and nonhostile conflict (Conflictual-Expressive) communication types were observed, while only hostile conflict was associated with distress for the H/L group. H/L couples reported similar levels of satisfaction in both the Harmonious and Conflictual-Expressive groups. H/L couples also fell within the distressed range when withdrawn communication patterns were observed; however, this was not the case for EA couples. These differences suggest that both types of conflict are associated with marital distress for EA couples, whereas hostile conflict and withdrawn behavior appear to be more negatively associated with marital satisfaction in H/L couples. Results provide support for the use of an observational coding system with H/L and EA couples and also suggest the importance of understanding how differences in expressions of conflict across ethnicities may relate to marital satisfaction.     

Timed picture naming: Extended norms and validation against previous studies

Factors affecting word retrieval were compared in a timed picture-naming paradigm for 520 drawings of objects. In prior timed and untimed studies by Snodgrass and Vanderwart (1980) and Snodgrass and Yuditsky (1996), concerns were raised that participants could not reliably name large numbers of items in a single session. We show that reliable results are obtained in a single session for 520 items and validate our method against previous findings by Snodgrass and colleagues for overlapping items. For these items, comparable levels of name agreement and latency are obtained, and we replicate effects of length, frequency, both objective and subjective age of acquisition, and visual complexity on reaction time (RT) and name agreement measures. Name agreement is unaffected by order of presentation, although there is a gradual increase in RTs across the session, requiring use of multiple random orders. Current extensions of our method include cross-linguistic, bilingual, developmental, and neuropsychological studies and comparisons of action naming and object naming.     

Towers of Hanoi and London: contribution of working memory and inhibition to performance

The Tower of Hanoi and Tower of London have become well-established executive function tasks that presumably tap cognitive skills mediated by the frontal cortex. It has been assumed that the two tower tasks are more or less interchangeable and that both measure working memory and inhibition processes. These assumptions were tested in a study involving 37 normal college volunteers (M age = 20 years). Participants were administered the Tower of Hanoi (TOH), Tower of London-Revised (TOL-R), two working memory tests, and two tests of inhibition. The two tower tasks correlated significantly (r = .39), but only moderately. The working memory and inhibition variables explained over one-half of the variance in TOL-R performance; however, there was a relatively weaker contribution of inhibition to TOH performance.