Skilled Observation and Change Blindness: A Comparison of Law Enforcement and Student Samples

Some evidence suggests that expertise and observational skills training can reduce attentional errors, such as change blindness. Laypeople typically assume that law enforcement officers possess acute observational skills, but no research to date has compared law enforcement and lay samples on their susceptibility to change blindness. In the present study, student and law enforcement samples completed a change blindness task and attempted to identify the target(s) from four line‐ups. Law enforcement officers and students were equally susceptible to change blindness regarding the switch in the target's identity, but students were more likely than officers to detect changes in the target's clothing. Students also performed better on the line‐up task, overall, than officers. Additionally, whereas students' confidence was positively correlated with identification accuracy under some circumstances, officers' confidence was either uncorrelated or negatively correlated with accuracy. We discuss the implications of these findings and suggest some factors accounting for law enforcement officers' relatively poor performance on these tasks. Copyright © 2014 John Wiley & Sons, Ltd.     

The Role of Social and Cognitive Processes in the Relationship Between Fear Network and Psychological Distress Among Parents of Children Undergoing Hematopoietic Stem Cell Transplantation

The current study examined whether cognitive and social processing variables mediated the relationship between fear network and depression among parents of children undergoing hematopoietic stem cell transplant (HSCT). Parents whose children were initiating HSCT (N = 179) completed survey measures including fear network, Beck Depression Inventory, cognitive processing variables (positive reappraisal and self-blame) and social processing variables (emotional support and holding back from sharing concerns). Fear network was positively correlated with depression (p < .001). Self-blame and holding back emerged as individual partial mediators in the relationship between fear network and depression. Together they accounted for 34.3 % of the variance in the relationship between fear network and depression. Positive reappraisal and emotional support did not have significant mediating effects. Social and cognitive processes, specifically self-blame and holding back from sharing concerns, play a negative role in parents’ psychological adaptation to fears surrounding a child’s HSCT.     

Is eye gaze direction always determined without intent?

It is widely assumed that processing of gaze direction occurs “automatically,” in the sense that it is reflexive (unfolds in the absence of intention). We assessed this view in a task in which participants saw a schematic face in which the eyes were gazing left or right, along with a second directional target (an arrow in Experiment 1; a directional word in Experiment 2). The eyes and other directional target were sometimes congruent and other times incongruent. On each trial, participants were cued with a tone to respond to either the direction the eyes were gazing, or the direction the noneye target indicated. The time between the onset of the task cue and the onset of the face was manipulated so that on half the trials the face and the cue were presented at the same time. Regardless of the type of target, the congruency effect was the same size at the zero SOA as it was at the 750 SOA, suggesting that eyes were not processed until participants knew what task to perform. These results are consistent with the claim that processing of gaze direction is, at least some of the time, secondary to an intent (i.e., it is not reflexive).     

Domesticated dogs’ (Canis familiaris) use of the solidity principle

Organisms must often make predictions about the trajectories of moving objects. However, often these objects become hidden. To later locate such objects, the organism must maintain a representation of the object in memory and generate an expectation about where it will later appear. We explored adult dogs’ knowledge and use of the solidity principle (that one solid object cannot pass through another solid object) by evaluating search behavior. Subjects watched as a treat rolled down an inclined tube into a box. The box either did or did not contain a solid wall dividing it in half. To find the treat, subjects had to modify their search behavior based on the presence or absence of the wall, which either did or did not block the treat’s trajectory. Dogs correctly searched the near location when the barrier was present and the far location when the barrier was absent. They displayed this behavior from the first trial, as well as performed correctly when trial types were intermingled. These results suggest that dogs direct their searches in accordance with the solidity principle.     

How Adolescents’ Mental Health Predicts Their Physical Health: Unique Contributions of Indicators of Subjective Well-being and Psychopathology

Studies among youth have established a link between mental health and physical health, and highlight the importance of attending to these relationships to provide a more complete picture of functioning. However, most previous investigations have limited their focus to examining the relationship between physical health and either particular aspects of psychopathology or particular aspects of subjective well-being. The current study serves as a first examination that includes both positive (subjective well-being [SWB]) and negative (psychopathology) indicators of mental health in relation to physical health functioning, assessed via self-report measures completed by a sample of 401 early adolescents from the general population. Mental health indicators accounted for 30% of the variance in physical health ratings, and 4 of the 5 mental health indicators were unique predictors of physical health. Positive affect, a component of SWB, explained the most unique variance in physical health, followed by the other components of SWB. Results support the importance of attending to positive indicators of mental health when determining the link with physical health among youth. Implications for a research and practice focus on comprehensive wellness among youth are discussed.     

Dual-task effects of simulated lane navigation and story recall in older adults with and without memory impairment

ABSTRACT

While driving is a complex task, it becomes relatively automatic over time although unfamiliar situations require increased cognitive effort. Much research has examined driving risk in cognitively impaired elders and found little effect. This study assessed whether mildly memory impaired elders made disproportionate errors in driving or story recall, under simultaneous simulated driving and story recall. Forty-six healthy (61% women; mean age = 76.4) and 15 memory impaired (66% women, mean age = 79.4) elders participated. Cognitive status was determined by neuropsychological performance. Results showed that during dual-task conditions, participants stayed in lane more, and recalled stories more poorly, than when they did the tasks separately. Follow-up analysis revealed that verbatim recall, in particular, was reduced while driving for healthy participants. While memory impaired participants performed more poorly than healthy controls on both tasks, cognitive status was not associated with greater dual-task costs when driving and story recall were combined.     

Suppression of emotional stroop effects by fear-arousal

Abstract

Previous studies have suggested that subjects are slower to colour-name emotional words, when the meaning of these words is related to a fear or current concern. We carried out three experiments on subjects having either high or low fear of snakes, with the aim of replicating this finding, and of testing the effects of arousing fear in subjects at the same time. Unexpectedly, we could only replicate the predicted interference effect in the absence of threat, whether due to a snake or to another threatening stimulus. We conclude that emotional interference effects do depend on high levels of fearfulness or trait anxiety, and on a match between the content of the subjects' concerns and the meaning of the interfering material. However, this interference may be paradoxically obscured by fear arousal, or the presence of a real danger that alters processing priorities in highly fearful subjects.     

The Relationship Between Postdeployment Factors and PTSD Severity in Recent Combat Veterans

Combat traumas precipitate posttraumatic stress disorder (PTSD); however, nontraumatic deployment and postdeployment factors may also contribute to PTSD severity. The Deployment Risk and Resilience Inventory (DRRI) was used to investigate pre-, peri-, and postdeployment factors associated with current PTSD severity in 150 recent combat veterans with PTSD and hazardous alcohol use. Hierarchal linear regression analyzed what factors independently predicted PTSD severity when controlling for sociodemographic characteristics and combat specific variables. Four postdeployment factors independently predicted PTSD severity: unemployment, alcohol use, social support, and stressful (nontraumatic) life events. The centrality of trauma in the maintenance of PTSD and clinical implications for treatment providers are discussed.     

Concreteness and word production

Two experiments are reported that investigated the effect of concreteness on the ability to generate words to fit sentence contexts. When participants attempted to retrieve words from dictionary definitions in Experiment 1, abstract words were associated with more omissions and more alternates than were concrete words. These findings are consistent with the view that the semantic–lexical weights in the word production system are weaker for abstract than for concrete words. We found no evidence that greater competition from semantic neighbors was an additional reason why abstract words were harder to produce. Participants also reported more positive tip-of-the-tongue states (TOTs) when attempting to produce abstract words from their definitions, consistent with more phonological retrieval problems for abstract than for concrete words. In Experiment 2, participants attempted to generate words to fit into a sentence that described a specific event. The difference between the numbers of abstract and concrete words recalled was significantly smaller in the event condition than in the definition condition, and evidence no longer emerged of greater phonological retrieval failure for abstract words. Overall, the results are consistent with the view that the semantic–lexical weights, but not the lexical–phonological weights, are weaker for abstract than for concrete words in the word production system.     

Evaluation of stimulus control over a communication response as an intervention for stereotypical responding

Stereotypical behavior maintained by automatic reinforcement often does not result in harm but may be undesirable in some situations. In the current investigation, participants were 2 individuals who engaged in nonharmful stereotypical responses shown in an analogue functional analysis to be insensitive to social contingencies. After bringing these responses under stimulus control using differential punishment, both participants learned a mand to terminate punishment for stereotypy. We also assessed whether the mand could be brought under stimulus control.