Understanding Continuity to Recognize Discontinuity

In this paper the author comments on the contribution by António P. Ribeiro and Miguel M. Gonçalves (in this journal) that offer a creative and unique perspective on maintenance and transformation of problematic self-narrative. From here the author contributes to the topic through the exploration of some issues: a) the relation, in the dialogical process of self-narrative construction, between semiotic processes that give voice to the semantic opposition and semiotic processes that give voice to the contradictory; b) the relation between sameness and ipseity in the self-narrative process; c) the role of a pathemic axis of meaning in the generation process of self-narratives. A final reflection is done on narrative as a device of clinical intervention in which the author makes a distinction between methods based on the recognition and extension of variability and methods based on the recognition of permanency so to get to variability.     

A Model of Intrinsic and Extrinsic Motivations on Subjective Well-Being: The Experience of Overnight Visitors to a National Park

According to the Self-Determination Theory (SDT) (Deci and Ryan 1985), intrinsic and extrinsic motivations can be differentiated with levels along a continuum representing distinct self-regulatory styles for behavior. Behavioral regulations consider different degrees to which they represent autonomous or self-determined functioning and specifically intrinsic motivations are characterized by the highest level of self-determination. Past research into the SDT has highlighted correlations between reasons with high levels of autonomy or self-determination for engaging in a particular behavior and enhanced Subjective Well-Being (SWB), as well as positive behavioral outcomes. Little is known about the relationship between visitors’ reasons for visiting a national park, associated self-regulatory styles and their self-appraisals of SWB. Therefore, the present research investigates the relationship between intrinsic and extrinsic motivations for visiting the Kruger National Park (KNP), associated self-regulatory styles and self-evaluations of SWB among 389 overnight visitors. A structural equation model (SEM) is proposed to examine both the cognitive (life satisfaction) and affective (positive and negative feelings) components of SWB in association to motivations with different degrees of self-determination. Reflecting previous research, the results show that overnight visitors who are more intrinsically motivated have higher life satisfaction levels, higher positive feelings and lower negative feelings. In contrast, overnight visitors who are less intrinsically motivated have lower life satisfaction levels, lower positive feelings and higher negative feeling. The practical implications of these findings are highlighted.     

Visuospatial working memory and mental representation of spatial descriptions

The purpose of the present research is to investigate whether different components of working memory (WM) are involved in processing spatial and nonspatial texts. The interference effects of two concurrent tasks on comprehension and recall of two kinds of text were investigated in two experiments. Each participant listened to a spatial and a nonspatial text, with one of two concurrent tasks: articulatory suppression or spatial tapping. The dependent variables in Experiment 1 were accuracy of recall and verification of information inferred from the texts. In Experiment 2 response times in the verification task were also considered. Results support the hypothesis that verbal and spatial components of working memory are differentially involved in the comprehension and memory of spatial and nonspatial texts, with a selective interference effect of the spatial concurrent task on the spatial text and an interference effect of the verbal concurrent task on both the spatial and nonspatial texts. These effects emerged for recall, sentence verification, and response times. Our findings confirm previous results showing that the verbal component of working memory is involved in the process of text comprehension and memory. In addition, they show that visuospatial working memory is involved, in so far as the text conveys visuospatial information.     

The cost of a strategy

Abstract

Experiment 1 demonstrated a new kind of dual-task interference effect. The primary task was a speeded left-right discrimination of stimulus position (R1). The un speeded secondary task consisted of reporting verbally whether the stimuli were the same or different (R2). Stimulus exposure time was either 150 or 2000 msec. Two groups of subjects performed the primary task only, whereas two other groups performed both tasks and were instructed to emit R1 before R2. It was reasoned that the decision would be made to emit R1 before R2, and that this decision would produce a lengthening of R1. The results supported this prediction. Experiment 2 showed that the interference effect also occurred when the subjects were not explicitly instructed to emit R1 before R2, and was not due to either the mere presence of the second task or to response grouping. Experiments 3 and 4 compared two possible models for explaining the interference effect, i.e. the capacity-sharing model and the postponement model. As predicted by the postponement model, task difficulty did not interact, or interacted underadditively, with task overlap (Experiment 3), and the interference effect was not influenced by the amount of processing resources devoted to the primary task (Experiment 4). It was concluded that this new type of interference effect is best explained by the version of the postponement model that locates the bottleneck at the decision stage.     

The role of mental rotation and age in spatial perspective‐taking tasks: when age does not impair perspective‐taking performance

The relationship between self‐evaluation of sense of direction, mental rotation, and performance in map learning and pointing tasks has been investigated in a life‐span perspective. Study 1 compared younger and older people in the Mental Rotation Test (MRT) and on the Sense of Direction and Spatial Representation (SDSR) Scale. Older people achieved higher scores on the SDSR Scale, but a lower performance in MRT compared with younger participants. In Study 2, groups of younger and older adults, one of each, were matched in the MRT, and pointing tasks in aligned and counter‐aligned perspectives were administered. Our results showed that, when so matched, older participants performed better than the younger counterparts in perspective‐taking tasks, but their performance was worse in map learning. Aligned pointing was performed better than the counter‐aligned task in both age groups, showing an alignment effect. Furthermore the performance in the counter‐aligned pointing was significantly correlated with MRT scores. Copyright © 2006 John Wiley & Sons, Ltd.     

Holistic face processing can be independent of gaze behaviour: Evidence from the composite face illusion

People tend to perceive identical top halves (i.e. above the nose) of two face stimuli as being different when they are aligned with distinct bottom halves. This composite face illusion is generally considered as the most compelling evidence that facial features are integrated into a holistic representation. Here, we recorded eye‐movements during the composite face illusion in a delayed matching task of top halves of faces. Behavioural results showed a strong composite face effect, participants making more mistakes and taking longer time to match two identical top halves of faces when they were aligned (vs. misaligned) with different bottom halves. Importantly, fixation sites and eye‐movements were virtually identical when the top and bottom parts were aligned (composite illusion) or misaligned (no illusion), indicating that holistic face processing can be independent of gaze behaviour. These findings reinforce the view that holistic representations of individual faces can be extracted early on from information at a relatively coarse scale, independently of overt attention.     

Mirror-mediated string-pulling task in Eurasian jays (Garrulus glandarius)

Animal Cognition - Mirror tasks can be used to investigate whether animals can instrumentally use a mirror to solve problems and can understand the correspondence between reflections and the real...     

Executive function deficits in autism spectrum disorders and attention-deficit/hyperactivity disorder: examining profiles across domains and ages

Deficits in 'executive function' (EF) are characteristic of several clinical disorders, most notably Autism Spectrum Disorders (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD). In this study, age- and IQ-matched groups with ASD, ADHD, or typical development (TD) were compared on a battery of EF tasks tapping three core domains: response selection/inhibition, flexibility, and planning/working memory. Relations between EF, age and everyday difficulties (rated by parents and teachers) were also examined. Both clinical groups showed significant EF impairments compared with TD peers. The ADHD group showed greater inhibitory problems on a Go-no-Go task, while the ASD group was significantly worse on response selection/monitoring in a cognitive estimates task. Age-related improvements were clearer in ASD and TD than in ADHD. At older (but not younger) ages, the ASD group outperformed the ADHD group, performing as well as the TD group on many EF measures. EF scores were related to specific aspects of communicative and social adaptation, and negatively correlated with hyperactivity in ASD and TD. Within the present groups, the overall findings suggested less severe and persistent EF deficits in ASD (including Asperger Syndrome) than in ADHD.     

Resistance to the impact of interruptions during multitasking by healthy adults and dysexecutive patients

Two experiments (one with healthy adult volunteers and the other with controls and dysexecutive patients) assessed the impact of interruptions on a novel test of multitasking. The test involved switching repeatedly between four tasks (block construction, bead threading, paper folding, alphabetical searching) over a 10 min period. In Experiment 1, there were four groups of 20 healthy participants. One group attempted multitasking with no interruption, a second group was interrupted early in the test, a third group late in the test and a fourth group was interrupted both early and late. Interruption involved carrying out a fifth, unexpected task for a period of 1 min before returning to the four main tasks. There was no difference in multitasking performance between the groups. In Experiment 2 the participants were seven dysexecutive patients and 14 age-matched controls. A repeated measures approach was employed to assess the impact of two interruptions (early and late) for both groups. Contrary to predictions, the patients as well as controls were resistant to the effects of interruptions, despite their clearly impaired multitasking performance. These results suggest that the ability to deal with interruptions may be separable from the ability to organise and execute multiple tasks within a limited time frame.     

A microswitch program to foster simple foot and leg movements in adult wheelchair users with multiple disabilities

This study assessed a microswitch program to foster simple foot and leg movements in 2 adult wheelchair users with multiple disabilities. The participants' mood (indices of happiness) was recorded throughout the study. Data showed that participants rapidly increased the target foot and leg movements and maintained those movements during the course of the study, which lasted about 4.5 months. With regard to indices of happiness, 1 participant showed a fairly modest increase during the intervention while the other participant showed a substantial increase. Implications of the findings are discussed.