A case of persistent neurogenic stuttering following a missile wound

Observational criteria that have been proposed to distinguish developmental from neurogenic stuttering are critically reviewed. It is concluded that both conditions may closely resemble each other. As an example, a case of neurogenic stuttering following a missile would is reported.     

Fitting longitudinal reduced-rank regression models by alternating least squares

An alternating least squares method for iteratively fitting the longitudinal reduced-rank regression model is proposed. The method uses ordinary least squares and majorization substeps to estimate the unknown parameters in the system and measurement equations of the model. In an example with cross-sectional data, it is shown how the results conform closely to results from eigenanalysis. Optimal scaling of nominal and ordinal variables is added in a third substep, and illustrated with two examples involving cross-sectional and longitudinal data.Financial support by the Institute for Traffic Safety Research (SWOV) in Leidschendam, The Netherlands is gratefully acknowledged.     

Presence and television.

Film and a number of emerging entertainment technologies offer media consumers an illusion of nonmediation known as presence. To investigate the possibility that television can evoke presence, 65 undergraduate students were shown brief examples of rapid point‐of‐view movement from commercially available videotapes on a television with either a small screen (12 inches [30.5 cm], measured diagonally) or a large screen (46 inches [116.8 cm]). Participants' responses were measured via a questionnaire and a computer‐based recording of arousal (electrodermal activity). Viewers of both televisions reported an enjoyable sense of physical movement, excitement, involvement, and a sense of participation. Furthermore, as predicted, participants who watched the large screen television thought the movement in the scenes was faster, experienced a greater sense of physical movement, enjoyed the movement to a greater extent, found the viewing experience more exciting, and were more physiologically aroused. Practical and theoretical implications are discussed.     

The Severity of Childhood Abuse and Neglect in Relationship to Post-Traumatic Stress Disorder Among Female Sex Workers in the Netherlands

In this article, the relationship between childhood abuse and neglect and post-traumatic stress disorder (PTSD) in adulthood is examined in a sample of 123 female indoor sex workers in the Netherlands. It was hypothesized that the severity of childhood abuse and neglect is associated with the severity of PTSD. In this study, a substantial number of sex workers had experienced abuse, neglect, or both during childhood. Furthermore, a substantial number suffered from PTSD. Results show significant differences between sex workers suffering from PTSD and sex workers not suffering from PTSD, in the extent to which they have experienced abuse or neglect. Logistic regression analysis shows emotional abuse contributes significantly to the prediction of PTSD. Our findings suggest that the high rate of PTSD among sex workers might be partially related to childhood experiences, indicating that a number of sex workers might be traumatized before entering sex work.     

Differentiating clinical groups using the serial color-word test (S-CWT)

The present study attempted to differentiate 11 diagnostic groups by means of the Serial Color-Word Test (S-CWT), using multivariate discriminant analysis. Two alternative scoring systems of the S-CWT were outlined. Asample of 514 individuals who had clinical diagnoses of various types and 397 controls who had no diagnostic findings comprised the sample. The first discriminant analysis failed to differentiate the groups adequately. The groups were consequently reduced to four (schizophrenia, bipolar disorders, temporo-mandibular joint pain dysfunction syndrome, and eating disturbances), which gave better reclassification findings for a clinical application of the test. This classification gave over 55% correct assignments. The final four groups had a statistically significant discrimination on the test, which remained stable also in a bootstrap procedure. Implications for treatment indications and outcomes as well as strategies for further studies using the S-CWT are discussed.     

Unconscious reward cues increase invested effort,but do not change speed–accuracy tradeoffs

While both conscious and unconscious reward cues enhance effort to work on a task, previous research also suggests that conscious rewards may additionally affect speed–accuracy tradeoffs. Based on this idea, two experiments explored whether reward cues that are presented above (supraliminal) or below (subliminal) the threshold of conscious awareness affect such tradeoffs differently. In a speed–accuracy paradigm, participants had to solve an arithmetic problem to attain a supraliminally or subliminally presented high-value or low-value coin. Subliminal high (vs. low) rewards made participants more eager (i.e., faster, but equally accurate). In contrast, supraliminal high (vs. low) rewards caused participants to become more cautious (i.e., slower, but more accurate). However, the effects of supraliminal rewards mimicked those of subliminal rewards when the tendency to make speed–accuracy tradeoffs was reduced. These findings suggest that reward cues initially boost effort regardless of whether or not people are aware of them, but affect speed–accuracy tradeoffs only when the reward information is accessible to consciousness.     

After images and pain tolerance: a descriptive study on their interrelationship

After images are based on physiological processes, they can also be treated as subjective phenomena with a psychological meaning. This statement also applies to pain. The basic working hypothesis of this study concerned the relationship between the two phenomena. Forty-one respondents (23 females, 18 males, age range 20-45 years) were given the Cold Pressor Test and the Serial After Image Technique. The data analysis was done by means of cross-tables and an exploratory optimal scaling program (OVERALS). Three pain tolerance groups (low, medium, high) could be differentiated fairly well on the basis of the after image characteristics of the respondents. Pain intolerant respondents more frequently had small and "immature" after images, whereas highly pain tolerant respondents had more large and "mature" after images. The implications of these results for a bio-psycho-social theoretical frame of reference for pain are discussed.     

The implicit power motive predicts decisions in line with perceived instrumentality

Past research suggests that the implicit power motive (i.e., an unconsciously held motivational disposition to derive pleasure from having impact on others) predicts a preference to interact with individuals having submissive-looking faces. The present research extends this finding by testing whether the relation between the implicit power motive and approaching submissiveness depends on instrumentality. In two experiments, participants were assigned to a group that would ostensibly compete with another group. Within this intergroup context, they were asked to select persons as leaders or members for the in-group or the out-group. Potential leaders and members were displayed as submissive-looking or dominant-looking. Results showed that the implicit power motive predicted decisions favoring dominant-looking persons as in-group leaders, and submissive-looking persons as out-group leaders (Study 1) or in-group members (Study 2). These findings indicate that the tendency for people high in the implicit power motive to approach submissive-looking persons depends on the perceived instrumentality for gaining influence over others.     

Cognitive labor shapes the desire for social and monetary compensation

When do people want something back for their mental labor? Based on equity theory, we propose that conscious experiences of success and effort—which emerge during cognitive work—shape people’s subsequent desire for social and monetary rewards. We examined this idea in a series of experiments, in which participants carried out a cognitive task, in which we manipulated task difficulty (easy vs. difficult) and performance feedback (high vs. low) within subjects. After each trial of this task, we probed people’s desire for compensation, in terms of social appreciation or money. Findings were in line with the entitlement hypothesis, which assumes that the experience of success can cause people to feel entitled to money. However, we found only indirect support for the effort compensation hypothesis, which assumes that the feeling of effort increases the subsequent desire for compensation, and no support for the intrinsic reward hypothesis, which assumes that people desire less social appreciation after already having experienced success. When considered together, our results suggest that labor-related feelings (of success and effort) shape people’s subsequent desire for money and social appreciation in several ways. These findings have potential implications for the effective use of performance feedback in work contexts.