The road user behaviour of New Zealand adolescents

The present study aimed to describe the road user behaviour of New Zealand adolescents and to investigate the applicability of the Adolescent Road user Behaviour Questionnaire (ARBQ) to New Zealand adolescents. In total 944 adolescents were surveyed in the North and South islands of New Zealand. Factor analysis of the scale produced three factors which had acceptable internal reliability and were very similar to those found in the original research. The three factors were “unsafe crossing behaviour”, “playing on the road” and “planned protective behaviour”. This research also found that males and those who were at least part Maori were more likely to put themselves at risk by playing on the road. Furthermore, those who identified themselves as being part Maori also engaged in unsafe road crossing behaviour more often than Caucasian and Asian adolescents. Interestingly, only the interaction effect between age and sex was significantly related to engagement in planned protective behaviour. However, despite differences between New Zealand and England, and differences in the sample characteristics, the scale appeared to be measuring the same latent variables. Therefore, this research confirmed that the ARBQ is a useful tool for investigating the behaviour of adolescents on the road.     

Fluid intelligence is independently associated with all-cause mortality over 17 years in an elderly community sample: An investigation of potential mechanisms

The long-term relationship between lower intelligence and mortality risk in later life is well established, even when controlling for a range of health and sociodemographic measures. However, there is some evidence for differential effects in various domains of cognitive performance. Specifically, tests of fluid intelligence may have a stronger association with mortality than do tests of crystallized intelligence. The present study examines the relationship between intelligence and mortality in a sample of 896 Australian community-dwelling males and females, aged 70–97 at recruitment and followed for up to 17 years. There were 687 deaths during the follow-up period. Cox proportional hazard regression models examined whether the relationship between intelligence and mortality might be mediated by socioeconomic status, by health behaviors, by health status, or a combination of these. Higher fluid intelligence — as measured by the Symbol–Letter Modalities Test — was strongly associated with lower mortality rates (Hazard ratio = 0.80; 95% confidence interval = 0.72–0.88), even after accounting for any combination of potential mediators and confounders. A significant association between crystallized intelligence, as measured by the National Adult Reading Test, and mortality (HR = 0.89; 95% CI = 0.80–0.99) was attenuated by the inclusion of socioeconomic, health status measures, and health behavior measures and when deaths from the first four years of the study were excluded. The findings show little support for the hypothesized mechanisms of the intelligence–mortality relationship.     

Cultural differences in self-verification: The role of naïve dialecticism

This research presents the first evidence of cultural differences in self-verification and the role of naïve dialecticism in mediating these differences. Chinese, Asian-American, and non-Asian American students completed a series of personality tests, and were presented with bogus feedback that was either self-consistent or self-discrepant, and either positive or negative. Whereas non-Asians self-verified (i.e., tended to exhibit resistance), mainland Chinese and Asian-American participants tended to adjust their self-views when they received (either positive or negative) feedback that contradicted their prevailing self-conceptions. Mediated moderation analyses showed that naïve dialecticism, mediated cultural differences in self-verification.     

Verbal Fluency,Semantics, Context and Symptom Complexes in Schizophrenia

Lexical-semantic access and retrieval was examined in 15 adults diagnosed with schizophrenia and matched controls. This study extends the literature through the inclusion of multiple examinations of lexical-semantic production within the same patient group and through correlating performance on these tasks with various positive and negative clinical symptoms. On tasks of verbal fluency, meaning generation, sentence production using contextual information and confrontation naming, participants with schizophrenia made significantly more semantic errors on naming tasks; produced fewer meanings for homophones; produced fewer items on semantic, phonological, cued and switching fluency tasks; and produced more errors on sentence production tasks when compared to healthy controls. Significant correlations were also observed between ratings of psychomotor poverty and measures of semantic production and mental inflexibility. This study has provided additional evidence for deficits in lexical-semantic retrieval which are not due to underlying semantic store degradation, do not involve phonological based retrieval, and at the level of sentence generation appear to vary as a function of the contextual constraints provided.     

A steady state visually evoked potential investigation of memory and ageing

Old age is generally accompanied by a decline in memory performance. Specifically, neuroimaging and electrophysiological studies have revealed that there are age-related changes in the neural correlates of episodic and working memory. This study investigated age-associated changes in the steady state visually evoked potential (SSVEP) amplitude and latency associated with memory performance. Participants were 15 older (59–67 years) and 14 younger (20–30 years) adults who performed an object working memory (OWM) task and a contextual recognition memory (CRM) task, whilst the SSVEP was recorded from 64 electrode sites. Retention of a single object in the low demand OWM task was characterised by smaller frontal SSVEP amplitude and latency differences in older adults than in younger adults, indicative of an age-associated reduction in neural processes. Recognition of visual images in the more difficult CRM task was accompanied by larger, more sustained SSVEP amplitude and latency decreases over temporal parietal regions in older adults. In contrast, the more transient, frontally mediated pattern of activity demonstrated by younger adults suggests that younger and older adults utilize different neural resources to perform recognition judgements. The results provide support for compensatory processes in the aging brain; at lower task demands, older adults demonstrate reduced neural activity, whereas at greater task demands neural activity is increased.     

Client‐centred group therapy for survivors of interpersonal trauma: A pilot investigation

Group therapy for trauma survivors provides an opportunity to share experiences with others in a supportive environment. Client‐centred groups have received very little attention as a way of working with traumatised people. Such groups promise to promote psychological growth following trauma. In this paper we present pilot data from a client‐centred group of six survivors of interpersonal violence who were experiencing complex posttraumatic stress reactions. Results suggested that those who perceived the presence of empathic listening within the group therapy sessions benefited from the group, showing greater positive changes. Clinical implications for working with trauma survivors, methodological considerations and directions for future research are discussed.     

The effects of cognitive demand upon relationships between working memory and cognitive skills

The present study explored the effects of cognitive demand upon relationships between working memory and cognitive skills. Both children and adults were tested on a measure of short-term memory and three measures of counting span, which varied in cognitive demand. When statistically controlling for short-term memory and the speed of counting operations, the more demanding the counting-span task, the closer its relationship with cognitive skills. The results are discussed in terms of practical and theoretical implications for working memory research.     

Dynamic Social Impact: A Theory of the Origins and Evolution of Culture

Dynamic social impact theory suggests that culture is created and shaped by local social influence as defined by four phenomena: (i) clustering, or regional differences in cultural elements; (ii) correlation, or emergent associations between elements; (iii) consolidation, or a reduction in variance; and (iv) continuing diversity. This article describes dynamic social impact theory and its propositions and reviews research supporting its predictions using a variety of methodologies and several types of cultural elements. This research suggests that cultures can be created and changed from the bottom-up through everyday communication with neighbors, friends, and coworkers. Attributes that are more important, observable, and demonstrable and less heritable may be more likely to spread and differentiate cultures than others.     

The influence of strategies on relationships between working memory and cognitive skills

The aim of this study was to test the effect of administration method on relationships between working memory span tasks and cognitive skills. Participants completed both participant-administered and experimenter-administered working memory measures in both verbal and visuospatial domains. Although the tasks were equally reliable, the additional time taken to implement strategies in the participant-administered tasks in the verbal domain reduced the correlations between working memory and reading comprehension and arithmetic. These findings did not extend to a visuospatial working memory measure, for which there was no significant difference between the participant-administered and experimenter-administered tasks in terms of their relationships with comprehension and arithmetic. However, performance on experimenter-administered working memory tasks in both verbal and visuospatial domains predicted unique variance in comprehension and arithmetic while controlling for scores on the participant-administered tasks. The results are discussed in terms of theoretical and practical implications for working memory research.