Problems in evaluating the real-world usability of digital voice communication systems

Digital voice communication systems are being used in a wide variety of applications. Human observers are used to measure the performance of computer voice systems. We also need to determine how losses in speech quality and intelligibility affect the performance of the communicator. This paper considers several situational variables that can affect the usability and acceptance of digital voice communication systems: task constraints, user experience, and communication environment. User experience and communication environment influence the acceptability of degraded voice systems; greater experience and field environments lead to higher acceptability ratings. However, performance measures, such as task completion time, are still adversely affected by lower voice quality.     

Body Mass Index and functional impairment: the explanatory role of anxiety sensitivity among treatment-seeking smokers

Obesity and smoking are highly prevalent public health concerns in the United States. Data indicate that elevated Body Mass Index (BMI) is related to functional impairment. However, there is limited understanding of mechanisms that may explain their comorbidity among smokers. The current study sought to test whether anxiety sensitivity explained the relation between BMI and functional impairment among 420 (46.9% females; M_age = 38 years, SD = 13.42) treatment-seeking, adult smokers. Results indicated that BMI yielded a significant indirect effect through anxiety sensitivity for functional impairment, b = 0.01, SE = .01, 95% CI = [.002, .021]. These findings remained significant after controlling for participant sex, negative affectivity, tobacco dependence, psychopathology, and medical conditions (i.e. hypertension, heart problems, respiratory disease, asthma). Such data provide novel empirical evidence that, among smokers, BMI may be a risk factor for functional impairment indirectly through anxiety sensitivity. Overall, such findings could potentially inform the development of personalized interventions among this particularly vulnerable segment of the smoking population.     

Q-sort assessment of attachment security during the preschool years: links from home to school

This study investigated relations among preschoolers' secure-base behavior with mother at home, stressful family conditions, and qualities of developing relationships with peers and teachers in preschool. Preschool-age children (N = 94; 51 boys and 43 girls) and their mothers were observed during multiple home visits, and their security of attachment was assessed with the Attachment Q-Set. Children in families with lower levels of stress had more secure attachment relationships with mothers. Both boys and girls who were less securely attached to their mothers expressed significantly more anger-aggression in preschool. For boys, higher levels of family stress were also significantly related to anger-aggression and to social competence in preschool. In addition, boys who were more securely attached to their mothers were more securely attached to their preschool teachers and were more popular with peers in preschool.     

Learning under anesthesia: Checking the light in the fridge? Commentary on Deeprose and Andrade (2006)

Research on learning under anesthesia has focused on showing that learning is possible in the absence of awareness. However, a simple dissociation between learning and awareness is conclusive only under strong additional assumptions, and the actual state of consciousness of an anesthetized person is difficult to determine. Instead of trying to establish complete unconsciousness, one might employ gradual anesthesia to experimentally vary the level of consciousness in a controlled fashion, checking whether cognitive processes exist that can change in opposite direction to measures of awareness.