Retrieval-induced forgetting after trauma: a study with victims of sexual assault

The Retrieval-Induced Forgetting (RIF) paradigm is used to study how the repeated retrieval practice of particular memories impairs the retrieval of related memory traces. A study is reported where this automatic form of forgetting was investigated in a group of sexual-assault victims and a control group. Using a recognition-cued RIF task, the present study examined RIF with neutral, positive, negative and trauma-specific stimuli. Response time data showed that irrespective of previous trauma exposure, a RIF effect was observed for neutral material, but not for emotional material. No differences in RIF between the trauma group and the control group were found. Inconsistencies with previous literature and the implications for emotional memory are discussed.     

Familiarity,Cued and Free Odor Identification and Their Association with Cognitive Functioning in Middle Aged and Older Adults

ABSTRACT

The aim of the present study was to examine the association between familiarity of odors, cued and free odor identification performance and cognitive function in elderly adults. It was further investigated how age affects performance on the various odor tasks. A third aim was to investigate the role of familiarity in explaining performance on the free identification task. One hundred and thirty-six participants (aged 45–79 years) with normal olfactory sensitivity were assessed with the Scandinavian Odor Identification Test (SOIT) and standardized tests of cognitive function. Familiarity did not correlate with any measure of cognitive function, while verbal identification performance was associated with several cognitive measures, although correlations were modest. In this sample, free odor identification was affected by increasing age to a marginally larger extent than cued identification performance and familiarity ratings. The results suggest that the different olfactory tasks involve different levels of cognitive processing.     

Latent classes of posttraumatic stress and growth

Background and Objectives: Potentially traumatic events may lead to different patterns of posttraumatic stress symptoms and posttraumatic growth. The objective of the present study was to identify subgroups with different patterns of posttraumatic reactions, and to determine whether these subgroups differed in terms of personal and social resources and indicators of adjustment. Design: This study used survey data collected 10 months after the 2011 Oslo bombing attack to investigate patterns of reactions among ministerial employees (N = 1970). Methods: We applied latent class analyses with covariates to extract subgroups of individuals. Results: Three classes of individual reactions were extracted, and these were similar among those who were and those who were not physically proximate to the bombing attack: “High stress/high growth” (27% and 11%, respectively), “Low stress/high growth” (74% and 42%, respectively), and “Low stress/low growth” (only among the not physically proximate: 47%). The classes differed in terms of gender, neuroticism, and social support as well as life satisfaction and daily functioning. Conclusions: Heterogeneous patterns of posttraumatic reactions were found. Physical proximity is not necessary to experience posttraumatic stress or growth after political violence. Among individuals with low stress, posttraumatic growth may not encompass higher life satisfaction or functioning.     

Habituation of exploratory activity to new stimuli, to the absence of a previously presented stimulus and to new contexts, in rats

Rats trained to run a shuttle-alleyway for food exhibited exploratory behaviour to a novel visual/tactual stimulus presented in a specific place of the alley. Intermittent presentation of the same stimulus in the same place resulted in reduction of the exploratory activity (habituation), both within and between sessions. The animals also directed exploratory activity to the absence of the previously presented stimulus at the place where the stimulus had been presented before; this latter response also habituated. The presentation (1) of the same stimulus to which the animals had already habituated in another place in the alleyway or when the animals were running in an opposite direction to the previous trials of stimulus presentation, or (2) of another stimulus, resulted, again, in the appearance of exploratory activity. These results lead to the conclusion that the animals code external events, store this information, and use it to detect spatial- and directional-contextual changes and to generate predictions about that specific environment.     

Coreferential Relations in Basque: The Annotation Process

In this paper we present the coreferential tagging of part of the EPEC Corpus of Basque. Although coreference is a pragmatic linguistic phenomenon highly dependent on the situational context, it shows some language-specific patterns that vary according to the features of each language. Due to the fact that Basque is not an Indo-European language, it differs considerably in grammar from the languages spoken in surrounding areas. We will explain these features and the decisions made in each case. After describing the criteria defined for coreferential tagging in Basque, the annotation process will be explained. Our annotation is based on a morphologically and syntactically annotated corpus that provides us with a manageable environment, in which the specific structures that are part of a reference chain can be more easily identified. A part of the corpus was tagged by two annotators who marked up the same text independently, and by another annotator that acted as judge, solving problems in case of disagreement. All this process has been automatized as a result of previous studies carried out in this field. The automatic detection of mentions (Soraluze et al., in: Proceedings of Konvens, 2012) has provided us with a better working environment, and given us the possibility to build a first significant corpus for a later computational treatment of automatic coreferential resolution.     

Perceptions of the cognitive compensation and interpersonal enjoyment functions of collaboration among middle-aged and older married couples

Perceptions of cognitive compensation and interpersonal enjoyment of collaboration were examined in three hundred middle-aged and older couples who completed measures of perceptions of collaboration, cognitive ability, marital satisfaction, an errand task and judged their spouse's affiliation. Older adults (especially men) endorsed cognitive compensation and interpersonal enjoyment and reported using collaboration more frequently than middle-aged adults. Greater need for cognitive compensation was related to lower cognitive ability only for older wives. Greater marital satisfaction was associated with greater interpersonal enjoyment. These two functions related to reports of more frequent use of collaboration and perceptions of spousal affiliation in a collaborative task.     

Mental time travel after trauma: the specificity and temporal distribution of autobiographical memories and future-directed thoughts

The present study investigated the relationship between trauma exposure and specificity and temporal distribution of autobiographical memories and future-directed thoughts. A group of sexual assault victims were compared with women without previous trauma exposure in relation to specificity of autobiographical memories, as measured by the Autobiographical Memory Task (AMT) and specificity of future-directed thoughts as measured by the Future Cueing Task (FCT). The temporal distribution of future-directed thoughts and autobiographical memories was studied by asking the participants to estimate when each memory reported on the AMT had occurred and when each future event reported on the FCT would occur. The results showed no difference between the trauma group and the controls on specificity of autobiographical memories and future-directed thoughts. In line with a review of Moore and Zoellner (2007), PTSD symptoms as measured by the Impact of Event Scale (IES) correlated negatively with specificity. Furthermore, we observed no difference in temporal distribution of future-directed thoughts or autobiographical memories between trauma exposed participants and controls.     

Prioritizing Patients for Surgery: Factors Affecting Allocation of Medical Resources for Kidney Transplantation,IVF, and Rhinoplasty1

The present study sought to investigate whether the factors that affect the allocation of scarce medical resources vary across different types of treatment and whether participants prioritize hypothetical patients based on patients' marital status, annual income, history of mental illness, and smoking habits. Study participants (N = 114) made prioritization decisions that were found to be very different across treatments. Repeated‐measure ANOVAs showed that single patients were favored for rhinoplasty, while married patients were favored for in vitro fertilization (IVF) and kidney transplant treatment. Nonsmoking patients were preferred over their smoking counterparts. Low‐income patients were favored for rhinoplasty and kidney transplant operations, but not for IVF. Mentally healthy patients were generally preferred over mentally ill patients.     

Horizontal and vertical pseudoneglect in peri- and extrapersonal space

The present study investigates the influence of depth on pseudoneglect in healthy young participants (n = 18) within three-dimensional virtual space, by presenting a variation of the greyscales task and a landmark task, which were specifically matched for stimulus–response compatibility, as well as perceptual factors within and across the tasks. Tasks were presented in different depth locations (peripersonal, extrapersonal) and different orientations (horizontal, vertical) within three-dimensional virtual space, using virtual reality technique. A horizontal leftward bias (pseudoneglect) for both tasks was found, which was stronger in peripersonal than in extrapersonal space. For the vertical condition, an upward bias was observed in the greyscales task, but not in the landmark task. These results support the hypotheses of right hemispheric dominance for visual spatial attention and our study is the first to examine horizontal and vertical orienting biases with the greyscales task in peri- and extrapersonal space. Furthermore, the differences in attentional asymmetries with respect to depth suggest dissociable neural mechanisms for visual attentional processing in near and far space and the lack of significant correlations implies independence of horizontal and vertical stimulus processing.     

Motor limitation in dual-task processing under ballistic movement conditions

The standard bottleneck model of the psychological refractory period (PRP) assumes that the selection of the second response is postponed until the first response has been selected. Accordingly, dual-task interference is attributed to a single central-processing bottleneck involving decision and response selection, but not the execution of the response itself. In order to critically examine the assumption that response execution is not part of this bottleneck, we systematically manipulated the temporal demand for executing the first response in a classical PRP paradigm. Contrary to the assumption of the standard bottleneck model, this manipulation affected the reaction time for Task 2. Specifically, reaction time for Task 2 increased with execution time for Task 1. This carryover effect from Task 1 to Task 2 provides evidence for the notion that response execution can be part of the processing bottleneck.