Influence of training on maintenance of equilibrium on a tilting platform

To assess the influence of training on the maintenance of equilibrium on a tilting platform, 13 young healthy male athletes aged 19 to 33 years were randomly divided into experimental (n=7) and control (n=6) groups. Two experimental sessions were performed before and after a specific 4-wk. training by the experimental group. Subjects stood upright on a tilting platform. The athletes were asked to maintain the platform as horizontal as possible during a 30-sec. test. The three-dimensional movements of the platform versus the ground were recorded by using a computerized optoelectronic digitiser. The platform plane was calculated and its directrix computed. The area of oscillation and instantaneous angular velocity of the directrix at standardized height were calculated. In both groups the area of oscillation and the angular velocity were reduced in Session 2, but the reduction was significant only in the experimental group. Specific training can significantly improve skill at maintaining equilibrium in young healthy sport performers.     

Measuring surface achromatic color: Toward a common measure for increments and decrements

Surface color is traditionally measured by matching methods. However, in some conditions, the color of certain surfaces cannot be measured: The surface simply looks brighter or darker than all the patches on a matching scale. We studied the reliability, validity, and range of application of three different types of simulated Munsell scales (white-, black-, and split-surrounded) as methods for measuring surface colors in simple disk-ring displays. All the scales were equally reliable for matching both increments and decrements, but about 20% of the increments were unmatchable on the white-surrounded scale, about 13% of the decrements were unmatchable on the black-surrounded scale, and about 9% of the increments were unmatchable on the split-surrounded scale. However, matches on all the scales were linearly related. Therefore, it is possible to convert them to common units, using regression parameters. These units provide an extended metric for measuring all increments and decrements in the stimulus space, effectively removing ceiling and floor effects, and providing measures even for surfaces that were perceived as out of range on some of the scales.     

Storage of verbal associations is sufficient to activate the left medial temporal lobe

Neuroimaging studies have shown that memory encoding activates the medial temporal lobe (MTL). Many believe that these activations are related to novelty but it remains unproven which is critical - novelty detection or the rich associative encoding it triggers. We examined MTL activation during verbal associative encoding using functional magnetic resonance imaging. First, associative encoding activated left posterior MTL more than single word encoding even though novelty detection was matched, indicating not only that associative encoding activates the MTL particularly strongly, but also that activation does not require novelty detection. Moreover, it remains to be convincingly shown that novelty detection alone does produce such activation. Second, repetitive associative encoding produced less MTL activation than initial associative encoding, indicating that priming of associative information reduces MTL activation. Third, re-encoding familiar associations in a well-established way had a minimal effect on both memory and MTL activation, indicating that MTL activation reflects storage of associations, not merely their initial representation.     

Gender and locus of control correlates of body image dissatisfaction

The study concerned sex and various locus of control correlates of body image satisfaction. The results indicated that men and women differ significantly in the degree and in the direction of dissatisfaction towards their bodies, which were consistent with the culturally defined ideals for men and women. Significant differences were also observed regarding self-perceptions, suggesting that women more than men are more likely to suffer from depression and have lower self-esteem which was itself associated with body image satisfaction. Individual beliefs about perceived control towards achieving an ‘ideal’ body shape were assessed using a new locus of control scale which correlated significantly with two scales measuring attitudes relating to body shape. The results from this new scale suggest that perceived locus of control beliefs are important predictors of the resulting behaviours and self-perceptions associated with body shape satisfaction and dissatisfaction.     

Very long-term retention of a novel

This study investigated the very long-term retention of a full-length novel originally studied as part of a university undergraduate course. One hundred and forty former students completed three tests designed to assess retention of Charles Dickens' Hard Times. Retention intervals ranged from 3 to 39 months. Subjects' responses when they were asked to report their most vivid and enduring memory of the novel were consistent with story grammar models which claim that components of a story which are higher in a hierarchy are remembered better than those lower in the hierarchy. A free recall test of the names and roles of the characters in the novel found that retention of both declined rapidly in the first few months following acquisition, that names were forgotten more quickly than roles, and that retention of both had stabilized above baseline before the longest retention interval. These data are interpreted in terms of a schema account of memory retention, in which retention of schematic knowledge (roles), but not non-schematic knowledge (names) can be mediated by abstract knowledge structures. The results of a fact verification test showed that memory for events of high importance in the novel was better than memory for events of low importance, consistent with models that suggest that texts and stories are represented hierarchically in memory. Confidence ratings also declined over time and showed that subjects generally assessed the accuracy of their responses correctly. The significant predictors of memory for the novel were retention interval and the mark obtained on a coursework essay on Hard Times.     

What are the relationship experiences of in which one member identifies as transgender? A systematic review and meta-ethnography

Transgender individuals and their partners may face unique challenges that other couples do not. These unique challenges merit investigation, understanding and consideration by systemic practitioners in order to provide a culturally attuned service for transgender clients. A systematic review of the literature into the experiences of couples in which one member is transgender identified 22 qualitative papers. A translation and synthesis of constructs from these papers utilising a meta-ethnographic approach generated a number of third order constructs organised into nine overarching themes. These themes included experiences of stigma and discrimination, issues of power, privilege, visibility and identity, and experiences of dissonance and dysphoria that required adjustments and negotiations on the personal and relationship levels. Implications for practice and avenues for future research are discussed.     

The role of the natural history museum in promoting word learning for young children

Although strong claims have been made about museums being ideal word learning environments, these are yet to be empirically supported. In the current study, 152 four- to five-year-olds children (81-M, 71-F) from minority backgrounds were taught six vocabulary items either in a museum, in their classroom with museum resources, or in their classroom with classroom resources. At test, children taught in their classroom with museum resources produced significantly more correct responses than children taught in the museum or in their classroom with classroom resources. Children were also significantly better at retaining the target vocabulary items than recalling them. These data demonstrate how context can impact word learning and point to the benefits of a collaborative relationship between schools and museums to support children's language development.     

Children's explanations for self‐presentational behaviour

Previous research has underestimated children's capacity to understand the self‐presentational behaviour of other people. We argue from recent research in mental‐state understanding that 8‐year‐olds should be able to attribute self‐presentational motives in order to explain others' behaviour. In the present study, children aged 6 to 11 years heard stories involving emotion‐masking displays and were then asked to explain the motivations for those displays. Results supported our prediction. Copyright © 1999 John Wiley & Sons, Ltd.     

Attention focusing instructions and coordination bias: Implications for learning a novel bimanual task

Four groups learnt a novel bimanual coordination movement pattern under instructions designed to manipulate focus of attention. It was predicted that instructions directing attention onto the effects of the action would facilitate learning. Three groups received demonstrations of the required 90° relative phase movement. Two of the demonstration groups also received instruction directing attention either towards the feedback (EXTERNAL), or the relationship between their arm movements and the feedback (RELATION). The third group received no attention directing instructions (DEMO). A final group was only provided with goal relevant feedback (NO DEMO). A scanning task enabled coordination bias to be assessed pre-practice. This was conducted to ensure task novelty and assign participants equally across groups based on strength of bias to in- and/or anti-phase. Acquisition rate was slower for the DEMO only group, especially compared to the EXTERNAL group. Additionally, participants biased to in-phase (as compared to anti-phase) during the scanning trial also showed high error early in practice. These differences remained in retention. Irrespective of feedback condition the DEMO group evidenced the most error in retention. However, all groups were affected by the removal of on-line feedback, although the attention-directing instructions provided during practice somewhat decreased the negative effects associated with feedback removal. Overall, the in-phase-biased participants were most affected by withdrawal of feedback. It was concluded that movement demonstrations alone do not facilitate learning of a novel coordination task, unless additional goal-directed instruction is provided. Additionally, individual differences in coordination bias pre-practice can be used to predict learning rate and quality.