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161.
McLeod (1980) reported some findings which showed that no phase of a movement was more attention-demanding than the other phases, contrary to all the results previously reported (e.g., Ells, 1973; Glencross, 1980). However, McLeod used a paradigm in which the two tasks were serial. Each task consisted of a series of 50 reaction time (RT) trials and/or 50 aiming movement trials. In addition to this, the interval of time between a response and the following signal within each series was constant. In order to try to replicate McLeod’s findings, two experiments were conducted in which the response-signal interval was manipulated. The hypothesis was that time certainty associated with a constant interval would facilitate the allocation of time and would thus artificially reduce the interference between tasks. In Experiment I, manual responses were used for the RT task; in Experiment II, they were vocal. Manipulation of the response-signal interval does not change one of the conclusions reached by McLeod: when the RT task involves vocal responses and the results on the RT task are analyzed in terms of response rather than stimulus arrival during the movement, then there is no phase of the movement which is more attention-demanding than the other phases. However, the results of Experiment II in which both the vocal RT task and the movement task significantly deteriorated in the dual-task condition were taken as an indication that the movement studied involved central attentional demands. 相似文献
162.
The authors investigated (a) whether the specificity of practice hypothesis is mediated by the importance of visual afferent information for the control of manual aiming movements and (b) how movement planning and online correction processes to the movement initial impulse are affected by the withdrawal of visual information in transfer. In acquisition, participants (N = 40) aimed at targets of different sizes in a full-vision or in a target-only condition before being transferred to a target-only condition without knowledge of results. The results supported the hypothesis that learning is specific to the source or sources of afferent information that are more likely to ensure optimal performance. The results also suggested that individuals will not always use visual afferent information more extensively when aiming at a small rather than at a large target. Instead, in a temporally constrained task, the relative efficiency of visually based corrections appears to mediate how exclusively an individual will rely on online visual afferent information for movement control. Finally, the detailed kinematic analysis performed in the present study clearly indicated that online modifications to the movement primary impulse are possible, arguing for a continuous or pseudo-continuous control of relatively slow aiming movements on the basis of visual afferent input. 相似文献
163.
Pablo Carbajosa Santiago Boira Lucía Tomás-Aragonés 《Aggression and violent behavior》2013,18(1):118-124
As a consequence of its coercive context, psychological interventions with men convicted of intimate partner violence in Spain involve a series of challenges in the design and development of the therapy program. This article reviews the main international contributions that have considered the difficulties produced by the context and analyzes the most important skills that the therapist can utilize in order to facilitate the therapeutic process. The difficulties have been grouped in accordance with origin: (a) difficulties derived from the context of the intervention; (b) the characteristics of the offender; (c) the therapist. The principal skills and strategies of the therapist seem to be related to the clear definition of the intervention context, the management of therapeutic relationship and the therapist's capacity for analysis and reflection. Finally, this work recognizes the need for research projects that focus on the therapist and aspects of the therapeutic process that could optimize the implementation of therapist training actions and improve treatment results. 相似文献
164.
Kyle F. Paradis Lisa M. Cooke Luc J. Martin Craig R. Hall 《Psychology of sport and exercise》2013,14(4):493-500
ObjectivesTo examine the relationship between passion (i.e., love for an activity that is valued for which and a great deal of time is invested) for exercise and exercise dependence symptoms.DesignA cross-sectional correlational survey design was utilised.MethodA total of 480 participants (n = 275 females, n = 205 males; Mage = 18.58, SD = 1.66) completed the Leisure Time Exercise Questionnaire (Godin, Jobin, & Bouillon, 1986), the Passion Scale (Vallerand et al., 2003), and the Exercise Dependence Scale-Revised (Hausenblas, Symons-Downs, & Nigg, 2004). Path analysis using structural equation modelling was used to assess the relationships between passion and exercise dependence.ResultsPath analysis using structural equation modelling via AMOS 20.0 (Arbuckle, 2011) revealed that harmonious passion (i.e., being in control of the activity and deciding when and when not to engage in it) was positively related to the exercise dependence dimensions of time and tolerance. On the other hand, obsessive passion (i.e., an internal compulsion to engage in the activity even when not appropriate to do so) was positively related to all seven exercise dependence dimensions: time, tolerance, withdrawal, continuance, intention effects, lack of control, and reduction in other activities (CFI = .91, RMSEA = .05, SRMR = .06).ConclusionAn empirical relationship has been established to support the proposed theoretical link between passion (harmonious and obsessive) for exercise and exercise dependence dimensions. 相似文献
165.
Luc Proteau Karine Boivin Stéphane Linossier Khémais Abahnini 《Journal of motor behavior》2013,45(3):277-286
The role played by peripheral visual information in the control of aiming movements is not fully understood, as is indicated by the conflicting results reported in the literature. In the present study, the authors tested and confirmed the hypothesis that the source of the conflict lies in the portion of the visual peripheral field that has been under scrutiny in the different studies. Participants (N = 60) moved a computer mouse from a fixed starting position to 1 of 3 targets under varied vision conditions. The portion of the peripheral visual field that best ensured directional accuracy of a sweeping movement was found to be located between 20° and 10° of visual angle, whereas the area found to favor directional accuracy of an aiming movement comprised 30° through 10° of visual angle. 相似文献
166.
In the 2 experiments reported in the present article, participants (N = 40, Experiment 1; N = 60, Experiment 2) learned to solve complex puzzles under different schedules of physical practice, observation, or a combination of the two. The results of both studies indicated that observation, in the absence of any physical practice, allows the development of an accurate but relatively nonfunctional cognitive representation. The data suggest that, even when the motor demands are minimal, the functional significance of the cognitive representation is not maximally realized until physical interaction with the task is possible. Thus, providing the participant with an interspersed practice schedule during acquisition enables that interaction to occur, thereby allowing the absolute number of physical practice trials to be reduced and replaced by observation trials, but leading to equivalent learning. 相似文献
167.
It has been found that emotional pictures are estimated to last longer than neutral ones. However, emotional and neutral stimuli often differ in their physical characteristics, too. Since this might also affect time perception, we present a method disentangling a possible confounding regarding the processing of physically different stimulus material. In the evaluative condition paradigm, participants, at first, learnt the association of neutral images with a certain Landolt ring and of emotional images with another Landolt ring with a different gap position. The conditioned Landolt rings were subsequently used in a temporal bisection task. In two experiments, the results revealed a temporal overestimation of Landolt rings conditioned with emotional pictures compared to neutral pictures showing that the temporal overestimation of emotional stimuli cannot be attributed to perceptual differences between neutral and emotional stimuli. The method provides the potential for investigating emotional effects on various perceptual processes. 相似文献
168.
Recent results indicate that adults modulate their initial movement impulse toward a stationary visual target by processing visual afferent information. The authors investigated whether the mechanisms responsible for those modulations are already in place in young children or develop as the children grow older. Adults (n = 10) and 6-, 8- and 10-year-old children (ns = 6, 7, and 7, respectively) performed a video-aiming task while vision of the cursor they were moving was (acquisition) or was not (transfer) visible. The results indicated that within-participant variability of the initial impulse trajectory of the children's aiming movement leveled-off in acquisition between peak extent deceleration and the end of the initial impulse, whereas it increased linearly as movement unfolded in transfer. The results also indicated that children modulate their initial movement impulse when visual afferent information is available, although to a lesser extent than adults do, and strongly imply that contrary to past suggestions, the initial impulse of an aiming movement is not ballistic. 相似文献
169.
With their eyes initially on either the home, midline, or final end position, 30 participants practiced a 2-target aiming movement. After 120 acquisition trials, participants performed a retention test and were then transferred to each of the other 2 eye conditions. During acquisition, all groups improved over practice, but the home group showed the greatest improvement. The temporal improvement was most pronounced in the times spent after peak velocity. Retention and transfer tests indicated that participants performed best under eye-movement conditions that were the same as the 1 they had practiced in. There was also positive transfer of training between conditions in which the oculomotor information was similar. Thus, to optimize learning, one should practice under the same afferent and oculomotor conditions that will be required for the final performance. 相似文献
170.
Amieva H Rouch-Leroyer I Letenneur L Dartigues JF Fabrigoule C 《Brain and cognition》2004,54(3):212-214
Alzheimer's disease produces a generalized slowing of cognitive processing increasing with the progression of dementia. However little is known about this phenomenon in the pre-demented stages. Our purpose was to investigate cognitive slowing in pre-demented subjects and their ability to develop target detection skills while performing a cancellation task. The results on 16 pre-demented subjects and 32 matched controls show that cognitive slowing is already present 3 years before subjects fulfill dementia criteria, at a stage where errors are still not different between pre-demented and control subjects. Additionally, the two groups significantly improved their time performances all along the test suggesting that both groups including the pre-demented group were able to progressively acquire a target detection skill. 相似文献