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191.
The effect of syntactic structure upon speech initiation times of stuttering and nonstuttering speakers 总被引:2,自引:0,他引:2
Logan KJ 《Journal of Fluency Disorders》2003,28(1):17-35
Past research has shown that adults who stutter tend to be slower than adults who do not stutter at initiating various speech-like movements, nonsense syllables, words, short phrases, and simple sentences. The present study sought to extend this research by examining the effect that syntactic structure has upon stutterers' and nonstutterers' ability to initiate sentences. Eleven persons who stutter (mean age=22.2 years) and 11 nonstuttering controls (mean age=23.3 years) read, rehearsed, and then reproduced a series of 96 sentences within a simple reaction time paradigm. The sentences were presented in four blocks of 24 sentences, and each block contained one version of each of the 24 base sentences. Versions of the base sentences varied, from simple to complex, along four levels of syntactic complexity. Results indicated that speech initiation times (SITs) were significantly longer for participants who stutter than they were for nonstuttering controls for three of the four sentence types. There was no significant difference in SITs across the four sentence types for either group. Among the stuttering participants, there was no significant correlation between stuttering severity and overall initiation time for the sentences. Consistent with other studies, the present findings suggest that persons who stutter are slower than persons who do not stutter at planning and/or initiating motor movements associated with speech production. EDUCATIONAL OBJECTIVES: The reader will be able to (1). describe how persons who stutter typically perform during various reaction time tasks, (2). explain the rationale for examining the effect of syntactic complexity upon speech initiation time, (3). discuss how the speech initiation times of persons who stutter compare to those of persons who do not stutter during the production of various types of sentences, (4). identify future research needs in this area. 相似文献
192.
Bedard AC Ickowicz A Logan GD Hogg-Johnson S Schachar R Tannock R 《Journal of abnormal child psychology》2003,31(3):315-327
Selective inhibition requires discrimination between auditory signals and is assessed using a modification of the stop-signal task. Selective inhibition was assessed in a group of 59 clinic-referred, DSM-IV-diagnosed children with attention-deficit hyperactivity disorder (ADHD) and compared to that of a community sample of 59 children. Methylphenidate (MPH) effects on selective inhibition were assessed in a subset of the ADHD sample that participated in an acute, randomized, placebo-controlled, crossover trial with 3 fixed doses of MPH. Children with ADHD performed more poorly than controls on the majority of selective stop-signal task parameters: they exhibited more anticipatory (invalid) responses, with less accurate and more variable responses on the response execution task, as well as a slower selective inhibition process. MPH improved speed of both inhibition and response execution processes; it also reduced variability of response execution and decreased nonselective inhibition. On the one hand, findings are consistent with purported inhibition deficit in ADHD, but on the other hand, suggest that neither the impairment itself, nor MPH effects, were restricted to inhibition. 相似文献
193.
Lower level mediation in multilevel models 总被引:1,自引:0,他引:1
Multilevel models are increasingly used to estimate models for hierarchical and repeated measures data. The authors discuss a model in which there is mediation at the lower level and the mediational links vary randomly across upper level units. One repeated measures example is a case in which a person's daily stressors affect his or her coping efforts, which affect his or her mood, and both links vary randomly across persons. Where there is mediation at the lower level and the mediational links vary randomly across upper level units, the formulas for the indirect effect and its standard error must be modified to include the covariance between the random effects. Because no standard method can estimate such a model, the authors developed an ad hoc method that is illustrated with real and simulated data. Limitations of this method and characteristics of an ideal method are discussed. 相似文献
194.
195.
In the present study, the specificity of repetition priming between semantic classification tasks was examined using Osgood's (Osgood, Suci, & Tannenbaum, 1957) semantic space as a heuristic for determining the similarity between classifications. The classification tasks involved judging the meaning of words on semantic scales, such as pleasant/unpleasant. The amount of priming across classifications was hypothesized to decrease with increasing distance (decreasing similarity) between semantic scales in connotative semantic space. The results showed maximum repetition priming when the study and the test classifications were the same, intermediate degrees of priming when the study and the test classification scales shared loadings on semantic factors, and little priming when the study and the test classification scales loaded primarily on orthogonal semantic factors--that is, when the distance between scales was maximized. Consistent with the transfer-appropriate processing framework, repetition priming in semantic classifications was highly task specific, decreasing with increasing distance between classification scales. 相似文献
196.
The Rotter Incomplete Sentences Blank (RISB; Rotter, Lah, & Rafferty, 1992; Rotter & Rafferty, 1950) was administered to African American (n = 94) and White (n = 100) members of fraternal organizations at a large Midwestern university to explore possible influences of racial group and socially desirable response tendencies. The RISB protocols were reliably scored (interrater agreement = 92%) by 3 independent scorers blind to participant racial membership. The mean scores of the 2 racial groups were not significantly different (p > .05). However, using the traditional categorical placement scores resulted in a disproportionate assignment rate for African American scores to the maladjusted group than would be anticipated by mere chance. 相似文献
197.
A theory of executive control is presented that proposes that executive processes control subordinate processes by manipulating their parameters, reconfiguring them to respond in accord with the current task set. It adopts C. Bundesen's (1990) theory of visual attention (TVA) and R. M. Nosofsky and T. J. Palmeri's (1997) exemplar-based random walk (EBRW) as the theory of subordinate processes. It assumes that a task set is a set of TVA and EBRW parameters sufficient to perform a task and that set switching involves changing those parameters. The theory solves 2 computational problems that emerge in dual-task situations: the binding problem and the serial order problem. It can perform dual tasks in series or in parallel but prefers the serial strategy because it is faster and it solves the binding problem naturally. The theory accounts for concurrence cost, set-switching cost, crosstalk between tasks, and the modulation of crosstalk by task set. 相似文献
198.
Caitlin A. Kirkwood Melanie H. Bachmeyer‐Lee Connor M. Sheehan Courtney R. Mauzy Logan A. Gibson 《Journal of applied behavior analysis》2021,54(1):429-450
We systematically replicated Bachmeyer et al. (2009) by examining extinction procedures matched to each function, individually and in combination, to treat the food or liquid refusal of 4 children diagnosed with a feeding disorder whose inappropriate mealtime behavior was maintained by multiple functions (i.e., escape and attention). Previous research suggests that adding differential reinforcement to extinction procedures may result in better treatment outcomes. Therefore, we added differential reinforcement to extinction procedures matched to each function. Differential reinforcement and extinction matched only to escape or attention resulted in low rates of inappropriate mealtime behavior and high, stable levels of acceptance for only 1 child. Consistent with Bachmeyer et al., inappropriate mealtime behavior decreased, and acceptance increased for the remaining 3 children only after we matched differential reinforcement and extinction procedures to both escape and attention. 相似文献
199.
Megan R. Turner Logan L. Watts Logan M. Steele Tyler J. Mulhearn Brett S. Torrence E. Michelle Todd 《Ethics & behavior》2018,28(6):483-496
Ethics courses are most commonly evaluated using reaction measures. However, little is known about the specific types of reaction data being collected (e.g., content relevance, course satisfaction) and how these reaction data relate to improvements in trainee performance (e.g., knowledge, moral reasoning). Using a sample of 381 ethics training sessions, major reaction data categories were identified. Content and course satisfaction were the most frequently collected types of reaction criteria. Furthermore, content relevance (r = .84) and course satisfaction (r = .79) showed strong, positive relationships with performance criteria, whereas content satisfaction demonstrated a moderate, negative relationship (r = –.28). These results and future directions for ethics training evaluation are discussed. 相似文献
200.
Robert K. Logan 《Cognitive processing》2018,19(1):109-114
We will explore the nature of space from a media ecology/Marshall McLuhan point of view. We will examine both space and time as the origin or etymology of the term ‘space’ includes both the notion of 3-space and time. We show how various media of communication influence how we perceive space and time from the origin of language to today’s digital revolution. 相似文献