3-D eye movement analysis

This paper presents a novel three-dimensional (3-D) eye movement analysis algorithm for binocular eye tracking within virtualreality (VR). The user’s gaze direction, head position, and orientation are tracked in order to allow recording of the user’s fixations within the environment. Although the linear signal analysis approach is itself not new, its application to eye movement analysis in three dimensions advances traditional two-dimensional approaches, since it takes into account the six degrees of freedom of head movements and is resolution independent. Results indicate that the 3-D eye movement analysis algorithm can successfully be used for analysis of visual process measures in VR. Process measures not only can corroborate performance measures, but also can lead to discoveries of the reasons for performance improvements. In particular, analysis of users’ eye movements in VR can potentially lead to further insights into the underlying cognitive processes of VR subjects.     

Facial expressions are more easily produced on the upper-lower compared to the right-left hemiface

Clinical research has concentrated on differences in intensity of expression between the right and left hemiface as a means to assess hemispheric differences in motor control. However, observations by social psychologists suggest that control of facial expression may be organized predominantly across the upper-lower hemiface because during social interactions individuals may produce brief facial blends of emotions, in which the upper and lower face display a different emotion. Full facial versus upper/lower and right/left facial blends of emotion were posed by 20 subjects, 10 men and 10 women ranging in age from 20 to 37 years. The subjects rated the difficulty of each pose on a 5-point Likert scale. Digital photographs of the poses were taken and the full and half-facial poses were shown in random order to four judges who indicated what pose was being performed. The results were very robust and confirmed that facial blends of emotion are more easily and accurately posed on the upper-lower than on the right-left hemiface. Our results are consistent with recent anatomical studies showing separate cortical areas for motor control of the upper versus lower face in primates. Based on recent research exploring hemispheric differences in perceiving facial blends of emotion, the left hemisphere may be more involved with modulating lower facial expressions and the right hemisphere more involved with modulating upper facial expressions.     

Economic implications of access to daylight and views in office buildings from improved productivity

Previous research has found significant impacts of daylight and views on the cognitive function of office workers. In this study, we use scores on decision-making performance to estimate the annual economic potential of optimizing daylighting and views in U.S. offices. Cognitive scores were compared against over 100,000 previous test scores to obtain the distributional shift in cognitive performance when working in an office with optimized daylighting and views as opposed to an office with traditional blinds. These changes in performance were then compared to compensation data from the Bureau of Labor Statistics. Office workers shifted on average from the 52nd percentile to 65th percentile, equivalent to a $11,809 difference in salary per person per year. When conservatively accounting for the number of employees working within 15 ft of a window with blinds, optimizing daylight and views in U.S. offices has the potential to generate $352B ($240B–$464B), or 1.7% of the 2018 U.S. gross domestic product (GDP), in additional productivity. These findings suggest that building developers, architects and tenants should give additional attention to daylight design and façade technology as they consider new building construction, renovation and leasing options.     

Measuring Executive Function Deficits Following Head Injury: An Application of SMS Simulation Technology

The Psychological Record - Neuropsychological tests have limited sensitivity in identifying subtle residual cognitive impairments in patients with good medical recovery from head injury and...     

Concurrent-schedule performance in dairy cows: persistent undermatching.

Performance of dairy cows responding under concurrent variable-interval variable-interval schedules of food delivery was examined, with results analyzed in terms of the generalized matching equation. In Experiment 1, bias measures indicated that crushed barley was preferred over meatmeal when these foods were available under the alternative schedules. For whole-session data, substantial undermatching of response and time-allocation ratios to obtained reinforcement ratios was evident. Postreinforcement pause time ratios approximately matched obtained reinforcement rates. Subtracting these times from total time-allocation values yielded net time-allocation ratios that undermatched obtained reinforcement ratios to a greater degree than did whole-session time-allocation ratios. In Experiment 2, substantial undermatching was evident when the same foods (hay for 2 cows, crushed barley for 2 others) were available under the alternative schedules. Food-related activities and other defined behavior not related to food were quantified by direct observation, and were found to occupy a substantial proportion (roughly 40% to 80%) of experimental sessions. Subtracting the time spent in these activities from the time allocated to each component schedule did not reduce the degree of undermatching obtained. Across all conditions in both experiments, slopes of regression lines relating behavioral outputs to environmental inputs characteristically were below 0.6, which agrees with prior findings and suggests that, contrary to suggestions in the literature, undermatching in dairy cows is not the result of using different foods under alternative schedules or differential pausing under those schedules.     

Effects of Alprazolam on Complex Human Functioning1

Benzodiazepines can reduce anxiety, can have favorable effects upon sleep, and may diminish problems that interfere with patients' quality of life. On the other hand, these drugs can generate transient anterograde amnesia and may diminish aspects of task performance. Research on the impact of alprazolam and other “tranquilizing” drugs has generally focused on tasks that remain below the complex efforts of managerial or professional personnel. Alprazolam-induced reduction of anxiety under challenging conditions might aid complex task performance, yet anterograde amnesia might interfere. In the present research, managers participated in validated complex simulation tasks. In a double-blind, dual crossover design, placebo, 0.5 mg, or 1.0 mg alprazolam was administered on 2 occasions during the task day. Drug treatment diminished performance on measures that require sequential actions but improved performance on measures less subject to short term memory but more determined by long-term style of functioning. Thus, depending on task requirements, positive or negative alteration of performance might occur.     

Building contexts that support effective community responses to HIV/AIDS: a South African case study

In this paper we discuss our conceptualisation of a 'health-enabling social environment', and some of the strategies we are currently using to build social contexts most likely to support effective HIV/AIDS management in southern Africa. In developing these ideas, we draw on our on-going collaboration with residents of Entabeni, a remote rural community in South Africa where 43% of pregnant women are HIV positive. The aim of this collaboration is to facilitate contextual changes that will enable more effective community-led HIV/AIDS management in an isolated area where people have little or no access to formal health or welfare support, and where HIV/AIDS is heavily stigmatised. We give an account of the three phases of collaboration to date. These include research; the dissemination of findings and community consultation about the way forward; preliminary project activities (skills training for volunteer health workers; partnership building and a youth rally) as a way of illustrating what we believe are six key strategies for facilitating the development of 'AIDS-competent' communities: building knowledge and basic skills; creating social spaces for dialogue and critical thinking; promoting a sense of local ownership of the problem and incentives for action; emphasising community strengths and resources; mobilising existing formal and informal local networks; and building partnerships between marginalized communities and more powerful outside actors and agencies, locally, nationally and internationally. We discuss some of the triumphs and trials of this work, concluding with a discussion of the need to set realistic goals when working at the community level in highly conservative patriarchal communities to tackle problems which may be shaped by economic and political processes over which local people have little control.     

Examining age differences in performance of a complex information search and retrieval task.

This study examined age differences in performance of a complex information search and retrieval task by using a simulated real-world task typical of those performed by customer service representatives. The study also investigated the influence of task experience and the relationships between cognitive abilities and task performance. One hundred seventeen participants from 3 age groups, younger (20-39 years). middle-aged (40-59 years), and older (60-75 years), performed the task for 3 days. Significant age differences were found for all measures of task performance with the exception of navigational efficiency and number of problems correctly navigated per attempt. There were also effects of task experience. The findings also indicated significant direct and indirect relations between component cognitive abilities and task performance.     

Effectiveness of cognitive-behavioral therapy for adolescent depression: a benchmarking investigation

In this study, we examined the effectiveness of cognitive-behavioral therapy (CBT) for adolescent depression. Outcomes of 80 youth treated with CBT in an outpatient depression specialty clinic, the Services for Teens at Risk Center (STAR), were compared to a "gold standard" CBT research benchmark. On average, youths treated with CBT in STAR experienced significantly slower symptom improvement than youths in the CBT benchmark. However, outcomes for STAR teens were more similar to the research benchmark when accounting for differences in referral source (clinical versus advertisement) between the datasets. Results support further efforts to test the effectiveness of CBT in clinically representative community practice settings and samples.