Automated gait analysis in the open-field test for laboratory mice

In this article, an automated and accurate mouse observation method, based on a conventional test for motor function evaluation, is outlined. The proposed measurement technique was integrated in a regular open-field test, where the trajectory and locomotion of a free-moving mouse were measured simultaneously. The system setup consisted of a transparent cage and a camera placed below it with its lens pointing upward, allowing for images to be captured from underneath the cage while the mouse was walking on the transparent cage floor. Thus, additional information was obtained about the position of the limbs of the mice for gait reconstruction. In a first step, the camera was calibrated as soon as it was fixed in place. A linear calibration factor, relating distances in image coordinates to real-world dimensions, was determined. In a second step, the mouse was located and its body contour segmented from the image by subtracting a previously taken “background” image of the empty cage from the camera image. In a third step, the movement of the mouse was analyzed and its speed estimated from its location in the past few images. If the speed was above a 1-sec threshold, the mouse was recognized to be running, and the image was further processed for footprint recognition. In a fourth step, color filtering was applied within the recovered mouse region to measure the position of the mouse’s paws, which were visible in the image as small pink spots. Paws that were detected at the same location in a number of subsequent images were kept as footprints—that is, paws in contact with the cage floor. The footprints were classified by their position relative to the mouse’s outline as corresponding to the front left or right paw or the hind left or right paw. Finally, eight parameters were calculated from the footprint pattern to describe the locomotion of the mouse: right/left overlap, front/hind base, right/left front limb stride, and right/left hind limb stride. As an application, the system was tested using normal mice and mice displaying pentobarbital-induced ataxia. The footprint parameters measured using the proposed system showed differences of 10% to 20% between normal and ataxic mice.     

Normative mid-life concerns among Vietnam veterans with post-traumatic stress disorders: Some preliminary empirical findings

Most Vietnam veterans are now in the mid-life years. Veterans suffering from post-traumatic stress disorder (PTSD) may find that mid-life concerns both precipitate and exacerbate their PTSD symptomatology. Preliminary research with four groups of adult males supports this notion. A cross-sectional study with nonveteans, Vietnam era noncombatants, Vietnam combat veterans not in treatment, and Vietnam veterans in treatment for PTSD suggests that the mid-life issues of affiliation, identity, demonic guilt, and work may be the most problematic. Implications for treatment are discussed.     

Psychometric properties of the Trait Emotional Intelligence Questionnaire: factor structure, reliability, construct, and incremental validity in a French-speaking population

In this research, we investigated the psychometrical properties of the Trait Emotional Intelligence Questionnaire (TEIQue, Petrides & Furnham, 2003) in a French-speaking population. In summary, we found that (a) TEIQue scores were globally normally distributed and reliable; (b) the United Kingdom four-factor structure (well-being, self-control, emotionality, sociability) replicated in our data; (c) TEIQue scores were dependent on gender but relatively independent of age; (d) there was preliminary evidence of convergent/discriminant validity, with TEIQue scores being independent of nonverbal reasoning (Raven's [1976] matrices) but positively related to some personality dimensions (optimism, agreeableness, openness, conscientiousness) as well as inversely related to others (alexithymia, neuroticism); (e) there was also preliminary evidence of criterion validity, with TEIQue scores predicting depression, anxiety, and social support as well as future state affectivity and emotional reactivity in neutral and stressful situations; (f) TEIQue scores were susceptible to socially desirable responding; however, (g) TEIQue scores had incremental validity to predict emotional reactivity over and above social desirability, alexithymia, and the Five-factor model of personality. Such results constitute encouraging preliminary findings in favor of the use of the TEIQue.     

Synchrony Preference: Why Some People Go With the Flow and Some Don't

As work in organizations becomes more fluid and fast paced the effective execution of tasks often requires people to be temporally adaptable in working with others. This paper brings to light the importance of understanding how people relate to time in the context of social interactions. By integrating the research on time and social motives, we develop a relational perspective about time. We introduce the construct of synchrony preference, an individual difference that describes a willingness to adapt one's pace and rhythm within social interactions for the purpose of creating synchrony with others. We develop a measure of synchrony preference that we validate using multiple methods across 4 studies and 7 samples, which include over 1,400 individuals. In particular, we establish a nomological network and show that synchrony preference predicts flexible pacing behaviors, interpersonal facilitation, contribution to team synchrony, contribution to team performance, and job dedication. Our results reveal that both scholars and practitioners can benefit from considering people's preference for synchrony when working with others.     

Psychological Treatment Improves Hemoglobin A1c Outcomes in Adolescents with Type 1 Diabetes Mellitus

Adolescents diagnosed with Type 1 Diabetes Mellitus often exhibit reduced adherence to their medical regimen and poor glycemic control. A retrospective study examined longitudinal hemoglobin A1c (HgbA1c) outcomes for adolescent patients referred to the psychology service embedded within an endocrinology clinic. Three patient groups were examined: (1) Treatment: 59 adolescents referred who engaged in psychotherapy; (2) No Treatment: 40 adolescents referred yet failed to initiate psychotherapy; (3) Control: 58 adolescents not referred for treatment and matched on demographics to the two treatment groups. Over 1 year, the Treatment group had a sustained decrease in HgbA1c while the No Treatment and Control groups had an overall increase in HgbA1c. At study end, the Treatment group had HgbA1c values that were not significantly different from patients who were not considered in need of psychological treatment (Control). Adolescents that utilized the pediatric psychology service saw decreased HgbA1c values over time.     

Psychometric Properties of the Trait Emotional Intelligence Questionnaire: Factor Structure,Reliability, Construct,and Incremental Validity in a French-Speaking Population

In this research, we investigated the psychometrical properties of the Trait Emotional Intelligence Questionnaire (TEIQue, Petrides &; Furnham, 2003 Petrides, K. V. and Furnham, A. 2003. Trait emotional intelligence: Behavioural validation in two studies of emotion recognition and reactivity to mood induction. European Journal of Personality, 17: 39–57. [Crossref], [Web of Science ®] , [Google Scholar]) in a French-speaking population. In summary, we found that (a) TEIQue scores were globally normally distributed and reliable; (b) the United Kingdom four-factor structure (well-being, self-control, emotionality, sociability) replicated in our data; (c) TEIQue scores were dependent on gender but relatively independent of age; (d) there was preliminary evidence of convergent/discriminant validity, with TEIQue scores being independent of nonverbal reasoning (Raven's [1976] Raven, J. C. 1976. Advanced Progressive Matrices Set II, Oxford, , England: Oxford Psychologist Press.  [Google Scholar] matrices) but positively related to some personality dimensions (optimism, agreeableness, openness, conscientiousness) as well as inversely related to others (alexithymia, neuroticism); (e) there was also preliminary evidence of criterion validity, with TEIQue scores predicting depression, anxiety, and social support as well as future state affectivity and emotional reactivity in neutral and stressful situations; (f) TEIQue scores were susceptible to socially desirable responding; however, (g) TEIQue scores had incremental validity to predict emotional reactivity over and above social desirability, alexithymia, and the Five-factor model of personality. Such results constitute encouraging preliminary findings in favor of the use of the TEIQue.