The Certification of Suicide in Eleven Western States: An Inquiry into the Validity of Reported Suicide Rates

ABSTRACT: From Durkheim's time to the present social researchers interested in the problem of suicide have relied upon officially reported rates of suicide to develop and test their theories. Despite the fact that the validity of any theory rests upon the accuracy of its underlying data, the relative accuracy of reported suicide rates have rarely been questioned or systematically evaluated. This paper investigates the process of death certification as practiced by a sample of 191 coroners in 11 western states. Findings indicate extensive variation in the backgrounds, professional resources, operating procedures, and governing statutes of coroners and coroners' offices and in policies concerning the use of the suicide mode. Since the coroner is generally charged with the official responsibility for certifying the mode of death when unnatural mode is suspect, the extent of variation found here calls into question the validity and comparability of reported suicide rates.     

Distribution of the product confidence limits for the indirect effect: Program PRODCLIN

This article describes a program, PRODCLIN (distribution of the PRODuct Confidence Limits for INdirect effects), written for SAS, SPSS, and R, that computes confidence limits for the product of two normal random variables. The program is important because it can be used to obtain more accurate confidence limits for the indirect effect, as demonstrated in several recent articles (MacKinnon, Lockwood, & Williams, 2004; Pituch, Whittaker, & Stapleton, 2005). Tests of the significance of and confidence limits for indirect effects based on the distribution of the product method have more accurate Type I error rates and more power than other, more commonly used tests. Values for the two paths involved in the indirect effect and their standard errors are entered in the PRODCLIN program, and distribution of the product confidence limits are computed. Several examples are used to illustrate the PRODCLIN program. The PRODCLIN programs in rich text format may be downloaded from www.psychonomic.org/archive.     

Same-sex and cross-sex siblings: Activity choices,roles, behavior,and gender stereotypes

Forty same-sex and cross-sex school-aged sibling pairs were observed in their homes during self-selected activities. The sex role learning index (SERLI) and a sex-typing room analysis were administered for the younger siblings, and maternal questionnaire information was obtained. Sibling gender constellation was associated with reliable differences in activity choices during the unstructured observations. Male dyads interacted less than other sibling groups, while older sisters in female dyads engaged in the most teaching. Older female siblings, regardless of the gender of the younger sibling, assumed the manager role frequently. Dyads containing an older girl also exhibited the greatest role asymmetrics. Affective differences related to gender constellation were also noted. Younger girls with older brothers and younger boys with older sisters evidenced the least gender stereotyping.     

Psychometric Properties of the Cultural Intelligence Scale in a Saudi Arabian Context

The purpose of this study was to evaluate the psychometric properties of the cultural intelligence scale (CQS) in a Saudi Arabian context. The CQS was administered to a random sample of 553 undergraduate students at Hail University. Results of a confirmatory factor analysis (CFA) supported the four‐factor structure of the CQS: cognitive, metacognitive, motivational, and behavioral. In addition, the results of a second‐order CFA indicated that these four factors can be further collapsed into one general factor. The CQS showed adequate internal consistency and test–retest reliability as well as convergent and discriminant validity. The results further revealed no significant differences between males and females. In sum, results suggest that the Arabic version of the CQS is a reliable and valid instrument for measuring an individual's intercultural intelligence.     

Current Directions in Mediation Analysis

ABSTRACT— Mediating variables continue to play an important role in psychological theory and research. A mediating variable transmits the effect of an antecedent variable on to a dependent variable, thereby providing more detailed understanding of relations among variables. Methods to assess mediation have been an active area of research for the last two decades. This paper describes the current state of methods to investigate mediating variables.     

R2 effect-size measures for mediation analysis

R ² effect-size measures are presented to assess variance accounted for in mediation models. The measures offer a means to evaluate both component paths and the overall mediated effect in mediation models. Statistical simulation results indicate acceptable bias across varying parameter and sample-size combinations. The measures are applied to a real-world example using data from a team-based health promotion program to improve the nutrition and exercise habits of firefighters. SAS and SPSS computer code are also provided for researchers to compute the measures in their own data.     

Changes in the relationship between movement velocity and movement distance in primary focal hand dystonia

The authors examined the relationship between movement velocity and distance and the associated muscle activation patterns in 18 individuals with focal hand dystonia (FHD) compared with a control group of 18 individuals with no known neuromuscular condition. Participants performed targeted voluntary wrist and elbow flexion movements as fast as possible across 5 movement distances. Individuals with FHD were slower than controls across all distances, and this difference was accentuated for longer movements. Muscle activation patterns were triphasic in the majority of individuals with FHD, and muscle activation scaled with distance in a similar manner to controls. Cocontraction did not explain movement slowing in individuals with dystonia, but there was a trend toward underactivation of the 1st agonist burst in the dystonic group. The authors concluded that slowness is a consistent feature of voluntary movement in FHD and is present even in the absence of dystonic posturing. Underactivation of the 1st agonist burst appears to be the most likely reason to explain slowing.     

Suggested reading

The problem of mystical/meditational experience is discussed from the point of view of the neural network theory, considering also the approach to (sub) quantum physics by Bohm and Hiley. It has been argued that the appearance of global uniform neural patterns, i.e. those with coherent activities of constitutive neurons, function as the basis of mystical unity. Various processes occurring as the result of the collective dynamics of a complex neural system are compared and correlated with mystical phenomenology on the one hand, and with quantum processes or neurophysiological effects on the other. Awareness may be a quantum phenomenon, so some speculations about neural‐quantum interactions and analogies are presented. The contact with the symmetric subquantum “sea”, in which the brain is embedded, may provide the background for the most radical experiences. Special attention is devoted to implicit versus explicit mental and transcendental processes, and to their multi‐level parallelism. Evolution towards transcendental consciousness brings an alternative lifestyle for the future.     

RMediation: An R package for mediation analysis confidence intervals

This article describes the RMediation package,which offers various methods for building confidence intervals (CIs) for mediated effects. The mediated effect is the product of two regression coefficients. The distribution-of-the-product method has the best statistical performance of existing methods for building CIs for the mediated effect. RMediation produces CIs using methods based on the distribution of product, Monte Carlo simulations, and an asymptotic normal distribution. Furthermore, RMediation generates percentiles, quantiles, and the plot of the distribution and CI for the mediated effect. An existing program, called PRODCLIN, published in Behavior Research Methods, has been widely cited and used by researchers to build accurate CIs. PRODCLIN has several limitations: The program is somewhat cumbersome to access and yields no result for several cases. RMediation described herein is based on the widely available R software, includes several capabilities not available in PRODCLIN, and provides accurate results that PRODCLIN could not.