Setting semantics: conceptual set can determine the physical properties that capture attention

The ability of a stimulus to capture visuospatial attention depends on the interplay between its bottom-up saliency and its relationship to an observer’s top-down control set, such that stimuli capture attention if they match the predefined properties that distinguish a searched-for target from distractors (Folk, Remington, & Johnston, Journal of Experimental Psychology: Human Perception & Performance, 18, 1030–1044 1992). Despite decades of research on this phenomenon, however, the vast majority has focused exclusively on matches based on low-level physical properties. Yet if contingent capture is indeed a “top-down” influence on attention, then semantic content should be accessible and able to determine which physical features capture attention. Here we tested this prediction by examining whether a semantically defined target could create a control set for particular features. To do this, we had participants search to identify a target that was differentiated from distractors by its meaning (e.g., the word “red” among color words all written in black). Before the target array, a cue was presented, and it was varied whether the cue appeared in the physical color implied by the target word. Across three experiments, we found that cues that embodied the meaning of the word produced greater cuing than cues that did not. This suggests that top-down control sets activate content that is semantically associated with the target-defining property, and this content in turn has the ability to exogenously orient attention.     

The Use of a Family History Risk Assessment Tool within a Community Health Care System: Views of Primary Care Providers

Primary care providers (PCPs) offered input regarding the incorporation of a family health history (FHH) risk assessment tool into a community health care system (CHCS). Sixteen PCPs participated in one of three focus groups. Perceived impediments included the lack of standard screening guidelines, effective screening tests, genetic counseling resources, and services for high-risk patients. The PCPs were concerned about their level of expertise, the cost of preventive health care, and genetic discrimination. They also were concerned about the use of a FHH tool by oncologists within the CHCS because of communication gaps between oncologists and PCPs, lack of clarity regarding follow-up and legal liability, and reimbursement issues. To integrate a FHH tool into a CHCS, PCPs will need consultation and referral services, evidence-based recommendations, and "just-in-time" educational resources. Oncologists who use the tool will need to develop a streamlined communication system with PCPs, establish clearly defined roles, and ensure patient follow-up.     

Examination of Negative Peer Contagion in a Residential Care Setting

There has been ongoing concern about the negative impact of residential treatment on youth in care. Research examining the impact of negative peer influence in juvenile justice, education, and residential care settings is reviewed. A study was conducted to examine the impact of negative peer contagion on the level of problem behavior in a residential care program, and the extent to which caregiver experience and youth time-in-program mediated that relationship. The study used archival data for 1,438 first-time admissions to a large Midwestern out-of-home residential program for youth with emotional and behavioral problems. Hierarchical Linear Modeling was used to examine the relationship between daily reports of conduct and oppositional defiant disorder (CD/ODD) behaviors and the percentage of conduct disorder youth living in a home. Greater exposure to conduct disordered peers was not related to increased rates of CD/ODD behavior. CD/ODD behavior was directly related to direct care staff level of experience and youth time in program. Implications for residential care are discussed.     

Visual working memory supports the inhibition of previously processed information: evidence from preview search

In four experiments we assessed whether visual working memory (VWM) maintains a record of previously processed visual information, allowing old information to be inhibited, and new information to be prioritized. Specifically, we evaluated whether VWM contributes to the inhibition (i.e., visual marking) of previewed distractors in a preview search. We evaluated this proposal by testing three predictions. First, Experiments 1 and 2 demonstrate that preview inhibition is more effective when the number of previewed distractors is below VWM capacity than above; an effect that can only be observed at small preview set sizes (Experiment 2A) and when observers are allowed to move their eyes freely (Experiment 2B). Second, Experiment 3 shows that, when quantified as the number of inhibited distractors, the magnitude of the preview effect is stable across different search difficulties. Third, Experiment 4 demonstrates that individual differences in preview inhibition are correlated with individual differences in VWM capacity. These findings provide converging evidence that VWM supports the inhibition of previewed distractors. More generally, these findings demonstrate how VWM contributes to the efficiency of human visual information processing--VWM prioritizes new information by inhibiting old information from being reselected for attention.     

Testing the role of response repetition in spatial priming in visual search

In common “attention” tasks, which require stimulus-identity processing prior to the formation of a speeded key-press response, spatial priming effects depend on response repetition. Typically, the repetition of a stimulus location is advantageous when the prior response repeats, but disadvantageous or inconsequential when the prior response changes. This link between responding and space makes it difficult to draw inferences about attentional bias from two-choice key-press tasks. Instead, the findings are accounted for by episodic retrieval theories, which argue that the response associated with a prior stimulus location is retrieved when a later stimulus occupies its space. This retrieval operation is advantageous if the prior response is needed but not otherwise, which explains typical patterns. This perspective motivated us to evaluate whether spatial priming effects in the visual-search literature depend critically on response repetition. To assess this, we reevaluated a series of experiments recently published by Tower-Richardi, Leber, and Golomb (Attention, Perception, & Psychophysics, 78(1), 114–132, 2016). Their goal was to determine the reference frame of spatial priming across visual search displays. Reassessment reveals that spatial priming was strongly dependent on response repetition when spatiotopic, retinotopic, and object-centered reference frames were perfectly confounded. However, when eye movements were made to dissociate the spatiotopic and object-centered reference frame from the retinotopic reference frame, spatial priming was positive and unaffected by response repetition. The findings demonstrate that at least two distinct processes factor into spatial priming across visual searches, which occur at different levels of representation.