The Role of Visual Feedback about Motion of the Ground on Postural Sway

Abstract

We asked whether body sway would be influenced by visual information about motion of the ground surface. On a ship at sea, standing participants performed a demanding visual search task or a simple visual inspection task. Display content was stationary relative to the ship or relative to the Earth. Participants faced the ship’s bow or its port side. Performance on the visual search task was representative of terrestrial studies. Body sway was greater during viewing of the Earth Stationary displays than during viewing of the Ship Stationary displays. We discuss possible implications of these results for theoretical and applied issues.     

Feature representations and analytic/nonanalytic processing.

Lee Brooks' original formulation of instance theory embedded the notion of an instance within the larger conception of a distinction between analytic and nonanalytic processing. Brooks has recently argued that features can be represented either in terms of their specific feature appearance, or in terms of the abstract information some particular instantiation embodies. This work reviews some recent studies that link reliance on different types of feature representations to different decision-making processes, and to different patterns of categorization behaviour. This in turn complicates the analytic/nonanalytic distinction, suggesting a more precise reformulation.     

Suicide Attempts and Suicide among Marines: A Decade of Follow‐up

Suicidal behavior among military personnel is of paramount public health importance because of the increased risk of death from suicide in this population. Pre‐ and post‐Marine recruit training risk factors for suicide attempts among current and former Marines were examined in 10 years following recruit training. The characteristics of the subsample of current and former Marines who died by suicide during this time are also described. Stressful and traumatic life events (e.g., childhood physical, sexual, and emotional abuse, sexual harassment during recruit training) and pre‐recruit training suicide attempts emerged as having strong associations with post‐recruit training attempts. Half of those who died by suicide in the 10 years following recruit training endorsed at least one significant life stressor prior to joining the Marines. This study highlights the importance of screening for stressful and potentially traumatic experiences occurring both before and during military service as part of a comprehensive suicide risk assessment in military samples.     

Step by step: A microgenetic study of the development of strategy choice in infancy

To examine patterns of strategy choice and discovery during problem‐solving of a novel locomotor task, 13.5‐ and 18‐month‐old infants were placed at the top of a staircase and encouraged to descend. Spontaneous stair descent strategy choices were documented step by step and trial by trial to provide a microgenetic account of problem‐solving in action. Younger infants tended to begin each trial walking, were more likely to choose walking with each successive step, and were more likely to lose their balance and have to be rescued by an experimenter. Conversely, older infants tended to begin each trial scooting, were more likely to choose scooting with each successive step, and were more likely to use a handrail to augment balance on stairs. Documenting problem‐solving microgenetically across age groups revealed striking similarities between younger infants' strategy development and older children's behaviour on more traditionally cognitive tasks, including using alternative strategies, mapping prior experiences with strategies to a novel task, and strengthening new strategies. As cognitive resources are taxed during a challenging task, resources available for weighing alternatives or inhibiting a well‐used strategy are reduced. With increased motor experience, infants can more easily consider alternative strategies and maintain those solutions over the course of the trial.     

Long‐Term Effects of the Family Check‐Up in Early Adolescence on Risk of Suicide in Early Adulthood

The impact of the Family Check‐Up (FCU), a school‐based prevention program, as delivered in public secondary schools on suicide risk across adolescence, was examined. Students were randomly assigned to a family‐centered intervention (N = 998) in the sixth grade and offered a multilevel intervention that included (1) a universal classroom‐based intervention, (2) the FCU (Dishion, Stormshak, & Kavanagh, 2011), and (3) family management treatment. Engagement with the FCU predicted significant reductions in suicide risk across adolescence and early adulthood.     

Impact of the 2016 U.S. Presidential Election on Politically Divided Relationships

Political identity represents a salient component of counselor and client identity tied to one's values and beliefs. The 2016 U.S. presidential election has been viewed as an especially divisive political environment that may have heightened emotion and elevated personal and collective political identities to new levels of awareness. We present findings from a consensual qualitative research study exploring personal and relational impacts of the election and discuss participants' (N = 16) strategies for relationship maintenance.