Tim Alexander

Factors Associated With Social Interactions Between Deaf Children and Their Hearing Peers: A Systematic Literature Review

Research indicates that deaf children can have marked social difficulties compared with their hearing peers. Factors that influence these social interactions need to be reviewed to inform interventions. A systematic search of 5 key databases and 3 specialized journals identified 14 papers that met the inclusion criteria. Methodological quality of the articles was assessed using an adapted checklist. There was a general lack of consensus across studies. The main factors investigated were the deaf childs communication competency, age, and level of mainstreaming, which overall were positively associated with peer interactions. Some studies also found that females were more likely to have positive social interactions. The majority of studies were cross-sectional. Some studies lacked appropriate control groups and did not recruit an appropriate range of informants. A wide range of factors were associated with social interactions between deaf and hearing children. The role of communication gained the highest consensus across studies. Other factors were involved in more complex interactions.

Blocking of spatial learning between enclosure geometry and a local landmark.

In a virtual environment, blocking of spatial learning to locate an invisible target was found reciprocally between a distinctively shaped enclosure and a local landmark within its walls. The blocking effect was significantly stronger when the shape of the enclosure rather than the landmark served as the blocking cue. However, the extent to which the landmark blocked enclosure-shape learning was not influenced by increasing the physical salience of the landmark. The outcomes are the first to suggest that cue-interaction effects, commonly found in human and animal contingency learning experiments, are also found in human spatial learning based on landmarks and enclosure walls. The data are discussed in terms of spatial reference frames.

The psychological impact of overactive bladder: A systematic review

This review aimed to provide an overview of the current research on the psychological impact of overactive bladder. A systematic search yielded 32 papers. It was found that people with overactive bladder tended to have greater levels of depression, anxiety and embarrassment/shame; difficulties with social life; impact on sleep and sexual relationships; and a lower quality of life than people without overactive bladder. A psychological impact on family members was also found. Psychological health should be considered an important aspect of managing overactive bladder and further research is required to determine how best to provide psychological care and support in this area.

Blocking of Goal-Location Learning Based on Shape.

Using desktop, computer-simulated virtual environments (VEs), the authors conducted 5 experiments to investigate blocking of learning about a goal location based on Shape B as a consequence of preliminary training to locate that goal using Shape A. The shapes were large 2-dimensional horizontal figures on the ground. Blocking of spatial learning was found when the initially trained Shape A was presented in the context of auxiliary shapes that were anticipated to be irrelevant to goal localization. When Shape A was initially presented in the absence of these auxiliary shapes, no evidence of blocking between shapes was apparent. The results are discussed in terms of the similarity between spatial and other forms of contingency learning, the operation of a specialized geometric module, and changes in attention as a consequence of discrimination learning.

Improving emotional prosody detection in the attending ear by cathodal tDCS suppression of the competing channel.

Currently it is assumed that cathodal stimulation (in transcranial direct current stimulation, tDCS) degrades the neural firing rate, and thus it is believed to degrade cognitive performance. Here we challenge this assumption by predicting that under high competition the cathodal stimulation might act as a noise filter, leading to an improved performance. We presented auditory targets with different emotional valence using a dichotic listening paradigm. We found that cathodal, but not anodal stimulation of the right IFG generated better prosody comprehension. Cathodal stimulation in competitive situations, such as the dichotic listening paradigm, can act like a noise filter, and may in fact enhance cognitive performance. This study contributes to understanding the way the IFG is engaged with prosody functions, and explains the cathodal effects of tDCS. This might lead to the development of more efficient brain stimulation protocols.

Enclosure shape influences cue competition effects and goal location learning

In virtual-environment spatial-learning procedures, Experiment 1 investigated blocking of learning about distal landmarks beyond the walls of an enclosure following preliminary training to find a goal using local landmarks within the enclosure. Separate sets of blocking and control groups searched within enclosures that, in plan view, formed either a square or a circle. Blocking was apparent when training and testing occurred in the circular but not the square enclosure. In Experiment 2, preliminary training to find a goal using local landmarks blocked spatial learning based on a circular enclosure divided into four differently coloured sections. The results are discussed in relation to theories of incidental versus error-correcting learning linked to different types of spatial cue.

Cognitive correlates of pragmatic language comprehension in adult traumatic brain injury : A systematic review and meta-analyses

ABSTRACT Effective pragmatic comprehension of language is critical for successful communication and interaction, but this ability is routinely impaired following Traumatic Brain Injury (TBI) (1,2). Individual studies have investigated the cognitive domains associated with impaired pragmatic comprehension, but there remains little understanding of the relative importance of these domains in contributing to pragmatic comprehension impairment following TBI. This paper presents a systematic meta-analytic review of the observed correlations between pragmatic comprehension and cognitive processes following TBI. Five meta-analyses were computed, which quantified the relationship between pragmatic comprehension and five key cognitive constructs (declarative memory; working memory; attention; executive functions; social cognition). Significant moderate-to-strong correlations were found between all cognitive measures and pragmatic comprehension, where declarative memory was the strongest correlate. Thus, our findings indicate that pragmatic comprehension in TBI is associated with an array of domain general cognitive processes, and as such deficits in these cognitive domains may underlie pragmatic comprehension difficulties following TBI. The clinical implications of these findings are discussed.

Word Recognition Processes Modulate the Naso-Temporal Asymmetry of the Human Visual Field

Many visual tasks display a well-documented naso-temporal asymmetry (NTA), where sensitivity is greater to stimuli presented in the temporal hemifield. Four-letter strings were presented at various eccentricities under monocular vision conditions, and observers were asked to classify the stimuli as ‘words’ or ‘non-words’ in a lexical decision task (experiment 1). In experiment 2, the same observers had to classify the stimuli as ‘darker’ or ‘lighter’ (contrast discrimination). Apart from the task, the visual conditions and stimuli were identical in both experiments. The typical temporal hemifield advantage was found for a contrast discrimination task in both English and Hebrew readers, but only for lexical decision judgments in Hebrew readers. The lack of the expected NTA in English readers that was observed only for a reading but not a low-level visual task indicates that language lateralisation and reading-related learning can override fundamental, anatomically based, visual asymmetries.

When is better really better? Individuals' experiences of treatment for OAB with anticholinergic medication

Overactive bladder (OAB) has been found to have a number of psychological consequences, including anxiety, depression and shame. However, there is little research on how drug treatment, which has been found to be effective at reducing physical symptoms, impacts on these psychological effects. This study aimed to examine patients’ experiences of anticholinergic treatment for OAB, and the impact of both OAB and its treatment on psychological well-being. A cross-sectional, qualitative interview design with a secondary care outpatient sample was used. The approach was idiographic and sought to understand the detailed complexities and nuances of patient experiences. This small-scale qualitative study found that, even where there had been symptom reduction, patients did not feel ‘better’, and found it difficult to let go of worries and fears around OAB. These findings suggest that a person with OAB may need support even after a ‘successful’ treatment, as OAB continues to be at the centre of patients’ lives.

The relationship between self-blame for the onset of a chronic physical health condition and emotional distress : a systematic literature review

OBJECTIVE Past literature presents contrasting perspectives regarding the potential influence of self-blame on adjustment to illness. This systematic literature review aimed to summarize findings from all investigations to date that have explored the relationship between self-blame for the onset of a chronic physical health condition and emotional distress. METHOD Between November 2014 and February 2015, electronic databases were searched for relevant literature. Only those studies which assessed self-blame directly and related specifically to illness onset were included within the review. The methodological and reporting quality of all eligible articles was assessed, and themes within the findings were discussed using a narrative synthesis approach. RESULTS The majority of studies found self-blame to be associated with increased distress. However, several concerns with the quality of the reviewed articles may undermine the validity of their conclusions. CONCLUSIONS It is important for professionals supporting people with chronic physical health conditions to have an understanding of how of self-critical causal attributions might relate to emotional distress. Further research is required to understand the concept of self-blame, the factors that may encourage this belief and to develop reliable and valid measures of this experience. Copyright