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101.
Working memory span tasks: A methodological review and user’s guide   总被引:1,自引:0,他引:1  
Working memory (WM) span tasks—and in particular, counting span, operation span, and reading span tasks—are widely used measures of WM capacity. Despite their popularity, however, there has never been a comprehensive analysis of the merits of WM span tasks as measurement tools. Here, we review the genesis of these tasks and discuss how and why they came to be so influential. In so doing, we address the reliability and validity of the tasks, and we consider more technical aspects of the tasks, such as optimal administration and scoring procedures. Finally, we discuss statistical and methodological techniques that have commonly been used in conjunction with WM span tasks, such as latent variable analysis and extreme-groups designs.  相似文献   
102.
The apparel and clothing attributes important to persons with disabilities are poorly understood. The purpose of this study was to identify apparel attributes of personal value to persons using a wheelchair and used to evaluate clothing. Four focus group interviews on three categories of clothing, formal wear, casual wear, and undergarments, were conducted with 19 female wheelchair users. Participants discussed clothing generally and after viewing garments designed especially for people with disabilities. Analysis of the content of the interviews yielded 49 phrases or words that could be categorized into Physical Appearance, Physical Performance, Expressiveness, and Extrinsic Attributes. Participants were concerned most about Physical Appearance for which criteria are observable attributes of the garment. Attributes of value in order of importance are styling of garment, fabric, garment construction, and color. The Physical Performance criteria include in order of attention benefits of physical aspects such as convenience, performance of garment, fabric, and effect of care. Expressiveness criteria evoked participants' feelings and reaction to use. Extrinsic Attribute criteria are those used to evaluate and make purchase decisions and are of less importance. These 19 persons with disability value casual clothing which had regular features. Results describe useful information on the criteria disabled persons use to evaluate clothing for use.  相似文献   
103.
This article provides preliminary evaluation for a new and easy to use parental sensitivity scale, which is rated from a short videotaped play session with the parental figure. The five Tuned‐In Parent Rating Scales (TIP‐RS) have been developed for use with identified dyadic problems in infant–parent relationships and provide a window on the micro‐behaviours that may contribute to the dyadic disjunctions. A sample of 88 mothers who contacted a community early parenting unit was filmed in interaction with their infants and completed surveys including the Depression Anxiety and Stress Scale (DASS) and the Edinburgh Postnatal Depression Scale (EPDS). Six trained coders rated the videos. Confirmatory factor analysis supported the unidimensionality of the TIP‐RS. The TIP‐RS total score was negatively correlated with both the EPDS (r[N = 42] = ?.34, p = .024) and the DASS (r[N = 42] = ?.43, p = .029), providing evidence for its concurrent validity. Inter‐rater reliability across the six raters for each of the TIP‐RS sub‐scales and total score ranged from .68 to .83. The present results warrant continued investigation of the psychometric properties of the TIP‐RS as a tool for intervention with targeted parent–child relationships.  相似文献   
104.
We report a series of six single subject studies examining the effects of pharmacological blood pressure elevation on regional brain perfusion and language function. Previous reports indicate that hypoperfusion of specific brain regions, as delineated by magnetic resonance perfusion weighted imaging (PWI), is associated with disruption of selective lexical functions. On this basis, we hypothesized that reperfusion of the same regions, in the absence of infarct in that region, would restore the associated lexical function. We present five patients with impaired lexical-semantics associated with poor perfusion, but not infarction, of Brodmann's area 22 (BA 22), and one patient with impaired lexical-semantics and a superimposed deficit in retrieving the phonological representations of words, associated with poor perfusion Brodmann's area 37 (BA 37) as well as BA 22. Each patient was treated with induced blood pressure elevation to increase perfusion of the ischemic and dysfunctional tissue. Daily testing of naming and comprehension, with stimulus sets matched for frequency, familiarity, and length, showed improved lexical-semantics in the patients who showed reperfusion of BA 22 and improved oral naming (but not lexical-semantics) in the patient who showed reperfusion of BA 37. These cases illustrate that loss of function with hypoperfusion of a circumscribed area of the brain, and recovery of the same function with improved perfusion of that brain region, can reveal brain/language relationships prior to reorganization after brain injury.  相似文献   
105.
Most psychologists and educators assume that intelligence is a linear construct, meaning that smart people simply have more intelligence than their less gifted peers. Likewise, individuals with mental retardation are thought to have less intelligence. In contrast to this widely accepted belief, the authors posed an alternative hypothesis--that intelligence is qualitatively different in various populations. Using factor analysis of a standardization sample of the Woodcock-Johnson Test of Cognitive Ability (R. W. Woodcock & M. B. Johnson, 1989), the authors examined the nature of intellect across ability. Results indicated that the amount of variance attributable to Spearman's g declined as measured intellectual ability increased.  相似文献   
106.
The Sunny Days, Healthy Ways curriculum, which has been effective in previous trials, was disseminated to public elementary schools (n=2,030) and state-licensed child-care facilities (n=3,755) in 4 states. Two Web sites were created, varying in the amount and type of information. Mailings referred principals and directors to the sites. Overall 117 unique users made 172 visits to the sites. More repeat visits were made to the enhanced than to the basic site (p=.04). In a survey, 20.0% of principals and directors recalled receiving the mailings and 80.9% of these read them. Web-based strategies were weak, but the low response rate may be typical for such marketing. They will require supplementation by more personal approaches.  相似文献   
107.
Existing models of trauma suggest that for recovery to occur, trauma related cues and emotions require awareness and openness while survivors continue committing action toward valued life aims (other than regulating emotions). Based on this theoretical framework, an unwillingness to be in contact with distressing thoughts and feelings (experiential avoidance) might operate together with posttraumatic distress to predict when people find benefits and meaning in the aftermath of trauma. We hypothesized that people reporting posttraumatic distress and less reliance on experiential avoidance would report greater posttraumatic growth and meaning in life compared with other trauma survivors. We administered questionnaires to 176 college students reporting at least one traumatic event. Results supported these moderation models. This is the fourth study (with different samples, measures, and methodologies) to provide evidence that a combination of excessive anxiety and a heavy reliance on experiential avoidance leads to attenuated well-being. We discuss the implications for understanding heterogeneous trauma reactions.  相似文献   
108.
Whether recollection is a threshold or signal detection process is highly controversial, and the controversy has centered in part on the shape of receiver operating characteristics (ROCs) and z-transformed ROCs (zROCs). U-shaped zROCs observed in tests thought to rely heavily on recollection, such as source memory tests, have provided evidence in favor of the threshold assumption, but zROCs are not always as U-shaped as threshold theory predicts. Source zROCs have been shown to become more linear when the contribution of familiarity to source discriminations is increased, and this may account for the existing results. However, another way in which source zROCs may become more linear is if the recollection threshold begins to break down and recollection becomes more graded and Gaussian. We tested the "graded recollection" account in the current study. We found that increasing stimulus complexity (i.e., changing from single words to sentences) or increasing source complexity (i.e., changing the sources from audio to videos of speakers) resulted in flatter source zROCs. In addition, conditions expected to reduce recollection (i.e., divided attention and amnesia) had comparable effects on source memory in simple and complex conditions, suggesting that differences between simple and complex conditions were due to differences in the nature of recollection, rather than differences in the utility of familiarity. The results suggest that under conditions of high complexity, recollection can appear more graded, and it can produce curved ROCs. The results have implications for measurement models and for current theories of recognition memory.  相似文献   
109.
Do locomotor aftereffects depend specifically on visual feedback? In 7 experiments, 116 college students were tested, with closed eyes, at stationary running or at walking to a previewed target after adaptation, with closed eyes, to treadmill locomotion. Subjects showed faster inadvertent drift during stationary running and increased distance (overshoot) when walking to a target. Overshoot seemed to saturate (i.e., reach a ceiling) at 17% after as little as 1 min of adaptation. Sidestepping at test reduced overshoot, suggesting motor specificity. But inadvertent drift effects were decreased if the eyes were open and the treadmill was drawn through the environment during adaptation, indicating that these effects involve self-motion perception. Differences in expression of inadvertent drift and of overshoot after adaptation to treadmill locomotion may have been due to different sets of ancillary cues available for the 2 tasks. Self-motion perception is multimodal.  相似文献   
110.
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