Relationships between dual-task related changes in stride velocity and stride time variability in healthy older adults

Dual-task related gait changes have been previously reported for healthy older adults, suggesting that gait control requires attention. Compared to balance control, the involvement of attention in the control of the rhythmic stepping mechanism, as reflected by stride time variability, is not well known. In particular, under dual-task, the relative contributions of a second, attention-demanding task and changes in walking speed remain unclear. Thus, the aims of this study were (1) to assess whether walking with a slow-selected speed or walking while performing an attention-demanding task affected stride time variability in a sample of healthy older participants, and (2) to establish whether stride time variability under dual-task conditions is related either to the decrease of walking speed or the simultaneous attention-demanding task, or to both. Forty-five healthy older participants performed four experimental conditions: (1) walking at a normal self-selected speed, (2) walking at a slow self-selected speed, (3) performing a verbal fluency task when sitting on a chair, and (4) performing the verbal fluency task while walking at self-selected walking speed. Gait parameters were recorded across 15 meters, using Physilog. Results showed a significant dual-task related decrease in mean values of stride velocity, as well as a significant increase in mean values and coefficients of variation of stride time. These dual-task related changes in stride time were explained by the simultaneous performance of the verbal fluency task, the decrease of gait speed and the variability between participants. Although a relationship exists between decreased walking speed and increased stride time variability, the dual-task related increase of stride time variability was also significantly associated with the attention-demanding task, suggesting some attentional control for the rhythmic stepping mechanism of walking in healthy older adults.     

Investigation of the factorial structure and psychometric properties of the Persian version of the Toronto Alexithymia Scale-20 in patients with psychiatric disorders

The aims of this study were to assess the factor structure, validity, and reliability of the Persian translation of the Toronto Alexithymia Scale-20 (TAS-20) and to examine different models of the TAS-20 in Iranian patients with various psychiatric disorders. Participants were 839 patients with psychiatric disorders, including obsessive-compulsive disorder (OCD) (n = 80), schizophrenia (n = 82), bipolar disorder (BD) (n = 100), alcohol dependence (n = 81), major depressive disorder (MDD) (n = 95), psychosomatic disorders (n = 92), anxiety disorders (n = 85), post-traumatic stress disorder (PTSD) (n = 90), attention deficit hyperactivity disorder (ADHD) (n = 55), and suicide attempts (n = 79). Results indicated that the three-factor TAS-16 fit the data well, after removing four items from the externally-oriented thinking (EOT) subscale. In addition, the total score and subscales had strong internal consistency and concurrent validity. An alternative three-factor model and a four-factor model, which both allow the reverse-coded EOT items to load on a separate factor, also had an acceptable fit. The results suggest that after deleting four items from the EOT subscale, the 16-item TAS is a reliable scale among Iranian psychiatric patients. Moreover, the alternative three-factor and four-factor structures may be appropriate to apply among Iranian patients.

     

The Comparison of Death Anxiety,Obsession, and Depression Between Muslim Population with Positive and Negative Religious Coping

Death anxiety, obsession, and depression constitute three dimensions of death distress which can be influenced by religious coping in religious individuals. The aim of this study was to compare death anxiety, depression, and obsession between Muslims with positive and negative religious coping. In a cross-sectional study, a sample of 339 participants were selected via stratified random sampling method. The participants were screened using the Brief Religious Coping Scale, in which 60 individuals were identified to have positive religious coping and 62 individuals were recognized as individuals with negative religious coping. They responded to Death Anxiety Scale, Death Obsession Scale, and Death Depression Scale. The data were analyzed using factor analysis and multiple analysis of variance. The results of principal component analysis showed that death anxiety, death obsession, and death depression were separate factors of death distress. The results also revealed that individuals with negative religious coping gained higher scores than those with positive religious coping in all the three variables of death anxiety, obsession, and depression. Consistent with the previous studies and Terror Management Theory, this finding lays emphasis on the role of positive religious coping in reducing death distress and the possible consequent psychopathology.

     

Proposing a Measurement Model of REBT and Applying It to the Assessment of Well-Being and Happiness in Patients with Tension-Type Headaches

Journal of Rational-Emotive & Cognitive-Behavior Therapy - Depression, anxiety, stress (DAS) are triggers of tension-type headaches. The current research investigates how irrational cognitions,...