Coordinated interpersonal timing in the conversations of children who stutter and their mothers and fathers.

UNLABELLED: Coordinated interpersonal timing (CIT) is a measure of "conversational congruence," or "attunement," and refers to the degree to which the temporal aspects of the vocal behaviors of co-conversationalists are correlated over the course of a conversation [Jasnow, M., & Feldstein, S. (1986). Adult-like temporal characteristics of mother-infant vocal interaction. Child Development, 57, 754-761]. In the present study, CIT was examined in a group of children who stutter (CWS), and a matched group of nonstuttering children (CWDNS; children who do not stutter), during conversations with either their mother or father recorded in two separate sessions (i.e., mother-child, father-child). Separate audio signals for both the child and parent (mother or father) were analyzed using AVTA software, which allowed for the quantification of sound and silence patterns in simultaneous speech. Squared cross-correlations (i.e., coefficients of CIT) for the durations of five vocal behavior states were obtained for each subject, through time series regression analysis using lag procedures. Vocal state behaviors within conversational turns included: vocalization, pauses, turn switching pauses, and interruptive and noninterruptive simultaneous speech. Results indicated that CWS and their parents showed mutual influence (i.e., CIT in both directions, child to parent and parent to child, or bi-directional influence) for more vocal state behaviors than did CWDNS and their parents. In addition, the CWS exhibited CIT with their parents for the durations of more vocal state behaviors than did the CWDNS (i.e., unidirectional influence). Findings suggest that children who stutter may be more easily influenced by the subtle timing aspects of conversation. Taken further, some of these children may perceive conversations with their parents as either challenging or difficult because of an element of unpredictability brought into conversations by the production of stuttering, the social skills of the child, and the nature of the parent-child relationship. Consequently, these children may be engaging in more pervasive coordination of the temporal characteristics of their speech to those of their conversational partner, as a mechanism by which to more effectively manage verbal interaction. EDUCATIONAL OBJECTIVES: After reading this paper, the learner will be able to: (1) describe the phenomenon of coordinated interpersonal timing (CIT); (2) summarize research findings in CIT as they apply to the verbal interactions of children and their parents; (3) summarize research findings in parent-stuttering child interaction, especially those related to the temporal aspects of both parent and child conversational speech, and (4) discuss the applicability of the findings from the present study to the treatment of childhood stuttering.

Does expectancy affect alcohol absorption?

Many factors influence alcohol absorption, yet few studies have addressed the issue of whether or not experimental manipulations themselves may affect alcohol absorption. The current balanced placebo design study comparing the expectancy effects of root beer and non-alcoholic beer vehicles resulted in significantly lower blood alcohol levels in the root beer condition than in the beer condition even though alcohol doses were the same. Two possible explanations are discussed; differences in expectancy may have affected absorption, or fructose in the root beer may have slowed absorption of alcohol relative to the maltose in beer. The literature does not provide strong evidence for either of the hypotheses. The implication of this study's results is that alcohol absorption rate may be an important source of confounding effects in behavioral research in the laboratory, because it may be affected by beverages or other experimental conditions.

Aviation model cognitive risk factors applied to medical malpractice cases.

OBJECTIVE: Aviation accidents have been reduced substantially by training pilots to avoid high-risk behaviors caused by cognitive errors. To determine whether similar cognitive cause factors or errors are involved in medical malpractice cases, and to evaluate the reliability of identifying such factors, physicians reviewed state and federal malpractice cases in a legal database. METHOD: Reviewing physicians evaluated 30 cases meeting inclusion criteria from state and federal malpractice cases for the year 2004 in the 8th US Circuit Court of Appeals region, using criteria for cognitive factors derived from aviation. The cases were categorized into three classes based on the degree of agreement between the reviewers. The results as to prevalence of the factors and reliability of identifying the factors were then analyzed statistically. RESULTS: Fifty-nine percent of the cases met criteria for strong and good correlation with the factors. Cognitive factors involving IMSAFE (illness, medications, stress, alcohol, physiogical (f), and emotional) and medical team management/leadership can be reliably identified. Other factors, such as hazardous attitudes and loss of situational awareness, were identified with minimal reliability. CONCLUSION: The aeronautical cognitive causative approach can be translated into a medical approach to reliably identify cognitive causes of errors in a significant proportion of medical malpractice cases from a legal database.