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11.
This study was designed to provide a detailed analysis of the parameters which interact to produce a field hockey drive. The drive was performed by an elite performer under two conditions of uncertainty (Blocked and Random). The subject was asked to drive a field hockey ball toward a specified target. In the Blocked condition the speed of the approaching ball remained constant (20, 30 and 40 m.p.h.) while in the Random condition these speeds were randomly assigned to each trial. Cine analysis of the subject's successful responses under the two experimental conditions led to an investigation of the kinematics, phasing, and timing of the stroke. The subject placed emphasis upon varying the initial phases of the stroke (i.e., backswing and preparatory phases) in order to produce a temporally consistent ballistic downswing to ball contact. It seemed likely that the subject appraised the ball speed that was being delivered and then incorporated additional stick movement to ‘mark time’ before initiating temporally consistent movement phases, as spatial uncertainty increased, the subject delayed her response initiation, but then tended to respond in intervals of one reaction time for each stroke phase. Consistency was evident for displacement and initiation point values, but to a lesser extent than existed for the other variables. However, as a result of this adjustment in spatial location and displacement of the stick end during the preliminary phases of the response, the subject was able to produce a consistent and accurate ballistic downswing. 相似文献
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13.
The more the deviation from a sex-and-grade, self-concept score norm (as indexed on a pair-comparisons, adjectival inventory), the greater the incidence of reported drug use. This assertion applies (a) to both sexes (teenagers) for beer and wine, cigarettes, hard liquor, and marijuana, and (b) to males alone for speed and LSD.The first-named author developed the deviancy scale; both authors processed data. In the latter task, they were assisted by Mrs. Edith P. Ferguson, wife of second-named author. 相似文献
14.
Previous research had indicated that there were differences in the kinds of stimulus information processed by concentrated and distributed attention in peripheral vision. Concentrated attention was necessary for perceiving line arrangement differences, while line slant differences could be detected with distributed attention. However, experiments with foveal presentation showed no facilitation by concentrating attention. Experiment I replicated these results. Experiment II showed that distributed attention did degrade foveal line arrangement discrimination if the attention system was overloaded by increasing the number of elements in the array. Experiment III demonstrated that high element density was not a sufficient condition for these effects to occur. Line arrangement discrimination was reduced as letter number increased even when maximum density was held constant. In Experim~ent IV, it was shown that concentrating attention facilitated line arrangement discrimination relative to line slant discrimination in foveal vision when element number and density were held constant. The results are discussed in terms of several models postulating a difference between spread-out and concentrated attention systems. 相似文献
15.
Randolph Blake John M. Camisa Dianne N. Antoinetti 《Attention, perception & psychophysics》1976,20(2):113-118
Using both the method of adjustment and forced-choice techniques, it was found that binocular depth thresholds depend on the orientation of the test targets, which in these experiments consisted of long, thin rods. Stereoacuity is greatest with vertical rods and decreases progressively as the angle of orientation approaches horizontal. The relationship between stereoacuity and orientation is governed by the orientation of the images of the targets on the retina, and is predicted fairly well by the sine of the angle of orientation, suggesting an equivalence between angular rotation and reductions in rod length. 相似文献
16.
This study used two measures of cohesion for the process analysis of 12 short-term, time-limited groups for complicated grief. The measures had similar theoretical definitions but differed in terms of rater source (member vs. observer), measurement score (mean of items vs. global rating), and rating unit (individual vs. group). We examined the relationship between the measures, assessed the development of cohesion over the life of the group, and evaluated each measure's relationship to outcome. A principal components analysis with each measure yielded one cohesion component, which supported a unidimensional model; however, the two cohesion components were independent of each other, which supported a multidimensional model. Repeated measures analyses indicated that observer-rated cohesion developed in a quadratic manner (v pattern) across sessions, while member-rated cohesion developed in a linear manner. The object focus (the group, other members, the therapist) of the members' ratings determined whether cohesion increased or decreased across sessions. No significant relationships between cohesion and outcome were identified. Implications of the findings for the understanding of group cohesion are considered. 相似文献
17.
Chambless DL Fauerbach JA Floyd FJ Wilson KA Remen AL Renneberg B 《Journal of abnormal psychology》2002,111(3):502-512
Married couples with a female agoraphobic spouse (n = 22) were compared with demographically similar community control couples (n = 21) on self-report and observational measures of marital interaction. Consistent with hypotheses, husbands of agoraphobic women were more critical of their wives than were control husbands, and clinical couples were less likely to engage in positive problem solution than control couples. Contrary to hypothesis, clinical husbands were not less supportive than control husbands. Where general measures of marital distress were concerned, clinical couples, relative to control couples, evinced more distress by self-report, by their higher rate of negative nonverbal behavior, and by their longer sequences of negative exchanges. 相似文献
18.
Thérèse Yuen John L Bradshaw Dianne Sheppard Paul Lee Nellie Georgiou-Karistianis 《Child neuropsychology》2005,11(5):393-411
BACKGROUND: This study investigated the nature and functioning of the visual-spatial inhibition of return (IOR) phenomenon in children with "pure" Tourette's syndrome (TS), and those with comorbid forms of TS. METHOD: Children with TS-only and "TS + comorbid" (TS + ADHD +/- OCD) and matched controls performed the inhibition of return (IOR) task, which involved responding to left and right visual targets appearing on a computer screen that were preceded by congruent or incongruent exogenous visual cues. RESULTS: The TS-only group performed similarly on the IOR task to the controls. When the TS-only group was subdivided into children with mild and severe TS symptoms, a post hoc comparison between the controls and severe TS symptom children revealed that these TS children had a reduced magnitude of IOR for targets appearing in the right visual field. The comparison between the TS + comorbid and controls revealed an atypical IOR pattern for the TS + comorbid group. They displayed a loss of normal facilitatory and inhibitory effects for right visual field targets. CONCLUSIONS: The findings suggest abnormalities in attentional "disengage" and "move" mechanisms in TS when directing attention to the right visual field, which may reflect left posterior parietal, superior colliculus, and midbrain pathology. 相似文献
19.
Kashima Y Kokubo T Kashima ES Boxall D Yamaguchi S Macrae K 《Personality & social psychology bulletin》2004,30(7):816-823
Although differences in self-conception across cultures have been well researched, regional differences within a culture have escaped attention. The present study examined individual, relational, and collective selves, which capture people's conceptions of themselves in relation to their goals, significant others, and in groups, comparing Australians and Japanese participants living in regional cities and metropolitan areas. Culture, gender, and urbanism were found to be related to individual, relational, and collective selves, respectively. Australians emphasized individual self more than Japanese, women stressed relational self more than men, and residents in regional cities regarded collective self as more important than their counterparts in metropolitan areas. These findings provide support for the tripartite division of the self and suggest a need to construct a culture theory that links self and societal processes. 相似文献
20.
Nada-Raja S Skegg K Langley J Morrison D Sowerby P 《Suicide & life-threatening behavior》2004,34(2):177-186
A birth cohort of 472 women and 494 men aged 26 years was interviewed about a range of self-harmful behaviors first and then asked about suicidal intent. Lifetime prevalence of self-harm using traditional methods of suicide (ICD [International Classification of Diseases] self-harm) was 13%, with 9% of the sample describing at least one such episode as "attempted suicide." Other self-harmful behaviors were common; 14% of women and 33% of men reported self-battery. ICD self-harm over the past year was reported by 3%, mostly without suicidal intent. ICD self-harm and even lesser behaviors were associated with high odds of reporting suicidal ideation. The findings suggest that studies of self-harm should include behaviors not necessarily associated with suicidal intent. 相似文献