Adaptation of the State Trait Anxiety Inventory in Arabic: A Comparison with the American STAI

The main goal of the present study was to develop an Arabic adaptation of the State Trait Anxiety Inventory (STAI, Form Y, Spielberger, 1983). In addition, cultural and linguistic influences on the experience and expression of anxiety were assessed. The American STAI and fifty initial Arabic items were administered to 286 university students at the American University of Beirut, Lebanon. The American STAI was also administered to 336 university students at the University of South Florida. Item and factor analyses were conducted on responses of the calibration sample to obtain the final set of Arabic items, which was validated using the responses of the validation sample. In conducting item selection and validation of the Arabic STAI, internal consistency coefficients for subscales, corrected item-total correlations, alpha coefficients if-item-deleted, item-factor loadings, and theoretical meaningfulness were all used as criteria for selection of the best 10 Arabic items to be included in each subscale of the STAI: S-Anxiety Absent, S-Anxiety Present, T-Anxiety Absent, T-Anxiety present. The two-factor solution for the Arabic STAI yielded a simple solution with two distinct factors: Anxiety Present and Anxiety Absent for each of S-Anxiety and T-Anxiety, lending more support to the theoretical distinction of state and trait anxiety. Lebanese students reported significantly higher anxiety levels than their American peers on S-Anxiety Present, T-Anxiety Absent, and T-Anxiety Present, S-Anxiety and T-Anxiety of the American STAI. For S-Anxiety Absent, scores for the Lebanese sample were lower than American students but did not reach significance levels. S-Anxiety Absent and T-Anxiety Absent subscales assessed lower levels of anxiety rather than the higher levels of anxiety assessed by S-Anxiety Present and T-Anxiety Present. Females tend to experience and express higher levels of mild and severe anxiety symptoms as compared to males in both samples. Factor analyses of the American STAI for the American and Lebanese samples revealed similar two and three- factor solutions. For each of the State and trait subscales, three factors emerged: Anxiety Absent, Worry, and Emotionality factors, denoting the importance of cognitions and feelings in the experience and expression of anxiety

Improved Delay Bound for a Service Curve Element with Known Transmission Rate

Network calculus is often used to prove delay bounds in deterministic networks, using arrival and service curves. We consider a FIFO system that offers a rate-latency service curve and where packet transmission occurs at line rate without pre-emption. The existing network calculus delay bounds take advantage of the service curve guarantee but not of the fact that transmission occurs at full line rate. In this letter, we provide a novel, improved delay bound which takes advantage of these two features. Contrary to existing bounds, ours is per-packet and depends on the packet length. We prove that it is tight.Comment: 4 pages, 2 figure

Pathologic use of video games and gotivation. Can the Gaming Motivation Scale (GAMS) predict depression and trait anxiety?

Videogaming is an increasingly prevalent activity among adolescents worldwide. The present study aimed at adapting the Gaming Motivation Scale (GAMS) to the Italian context, assessing its psychometric properties and verifying its sensitivity to predict depression and anxiety levels. From a sample of 1899 participants, a group of 388 adolescents who participated in the survey was divided into two subgroups of Heavy (HG, N = 188) and Light Gamers (LG, N = 200). A sub-sample of N = 172 adolescents also filled-in CESD and STAI to assess, respectively, depression and trait anxiety. Internal consistency and factorial structure of the Italian version of GAMS (GAMS-it) have been evaluated. Moreover, a latent regression structural equation model by predicting the CES-D and STAI scores with the GAMS-it factors has been carried out. GAMS-it has adequate validity and reliability levels, showing a very similar factorial structure to the original version. Therefore, this scale can be used to evaluate gaming motivation, which is useful for gaming motivation screening. Finally, it has been found that lower gaming motivation can be related to high level of depression and anxiety. The present findings provide a coherent picture, supporting the reliability and validity of the GAMS-it, that appears potentially useful in predicting anxiety and depression levels in a population of adolescent

Topological Anderson Insulator in Three Dimensions

Disorder, ubiquitously present in solids, is normally detrimental to the stability of ordered states of matter. In this letter we demonstrate that not only is the physics of a strong topological insulator robust to disorder but, remarkably, under certain conditions disorder can become fundamentally responsible for its existence. We show that disorder, when sufficiently strong, can transform an ordinary metal with strong spin-orbit coupling into a strong topological `Anderson' insulator, a new topological phase of quantum matter in three dimensions.Comment: 5 pages, 2 figures. For related work and info visit http://www.physics.ubc.ca/~franz