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81.
This paper deals with the question of how to best allocate a finite instructional resource among different students — specifically how to divide time on a computer-assisted instruction (CAI) system among a number of eligible students.First several possible objectives for a time allocation strategy are considered. Examples include maximizing the students' mean grade placement without increasing the variance and maximizing the number of students who make a particular gain. Then using operations research techniques, time-allocation strategies are described to optimize the chance of reaching each objective. Finally the outcomes of various allocation strategies are predicted by computer simulations that use learning curves estimated from observed data.The simulation models indicated that for the students and curriculum used, different time allocation strategies make very little difference in overall results when reasonable assumptions are made concerning the ways time can be allocated during a normal school day. A much more important variable is the total amount of CAI time used by students. For example, the school grade-placement average can be increased as much by increasing total CAI time by ten percent as by any allocation strategy tested.Also at Institute for Mathematical Studies in the Social Sciences, Stanford University. Please address reprint requests to Elizabeth Macken Raugh, Computer Curriculum Corporation, 700 Hansen Way, Palo Alto, CA 94304. The authors thank Mario Zanotti for helpful suggestions about the appendix of this article.  相似文献   
82.
Four naive pigeons were given six generalization tests in extinction after periods of pretraining in which S+ appeared with food reinforcement and S? appeared in extinction. An analysis of sequential effects among presentations of test stimuli showed that the overall gradient was influenced differently by stimuli at the extremes of the continuum of test stimuli and by S+ and adjacent stimuli. Gradients consisting of responding in each stimulus when it was preceded by an extreme stimulus tended to peak at S+, while gradients produced when each stimulus was preceded by S+ or an adjacent stimulus tended to show a peak shift. This was true whether the overall gradient showed a peak shift or not. Two naive subjects were added and four additional tests were given after pretraining in which unequal frequencies of reinforcement accompanied both S+ and S?. Results of all 10 tests show that sequential effects occur during generalization testing in extinction and that these “local dimensional effects” are unlike local contrast. These stimulus-specific sequential effects may greatly influence overall gradient form.  相似文献   
83.
84.
The purpose of this study was to compare the effects of two methods of instruction designed to teach preservice elementary teachers to acquire and retain integrated science process skills. In one section instruction was provided by the teacher, whereas in the other section, instruction was provided by written self-paced self-instructional materials. Results indicated that the self-instructional method was significantly more effective than the teacher-directed method. Both treatments produced long-lasting retention effects.  相似文献   
85.
The goal of this study was to investigate how adult English speakers, who are good readers, but who differ in spelling ability, remember word-specific spelling information. In the first experiment, participants learned the spellings of words they had previously misspelled, while thinking out loud. The main strategies observed in order of popularity were: letter rehearsal, overpronunciation, comparison of the remembered and the correct spelling, morphological analysis and visualisation. All strategies produced good learning success for the better spellers, but weaker spellers had less success with overpronunciation, comparison and morphological analysis. In a second experiment, when participants were shown their misspelling and the correct spelling, and instructed to use either overpronunciation or comparison to learn the correct spelling, learning success was independent of spelling ability. However, sequential verbal memory ability was associated with greater success in using overpronunciation, and sequential visual memory ability with greater success in using comparison. The findings provide new insight into the types of strategies that advanced learners use spontaneously to memorise arbitrary letter sequences, as well as revealing how effective the strategies are.  相似文献   
86.
This two-pronged study seeks to ascertain the research psychographic characteristics of a select group of nurse professoriate (n=37) in a comprehensive university in the Philippines. The quantitative part of the study had an adapted survey questionnaire, which profiled the demographic and psychographic characteristics of the respondents. Defining the qualitative aspect of the inquiry was an in-depth interview with five (5) of the respondents chosen purposively to triangulate the data yielded by the questionnaire. Data were treated statistically and interpretively to describe the phenomenon under inquiry. It is interesting to note that while the nurse professoriate had shown a positive attitude towards research, variables such as time constraints, lack of research knowledge, research support structure and motivation hinder them from doing research activities. Implications of the study to reculturing, restructuring and reformulating efforts in research are also discussed.  相似文献   
87.
Two measures of the quality of group care for infants and toddlers   总被引:2,自引:0,他引:2  
Two sets of quality measures of group care were used to assess their predictive power for two sets of measures of the development of infant and toddlers in group day care. One of the quality measures we investigated was the Early Childhood Environment Rating Scale (ECERS). We replicated the findings of Scarr, Eisenberg, & Dealer-Deckard (1994) which were that the total score of the ECERS represents a global index and that the 37 items making up the scale are redundant and could be shortened considerably without loss of the scale as a quality criterion of group care for young children. Neither Scarr, Eisenberg, and Dealer-Deckard (1994) nor our own Factor Analyses of the 37 items supported the a priori distinction of seven Subscales. However further findings indicate that regardless of the redundancy within ECERS, two Subscales, dealing mainly with adult-child, child-child and adult-adult interactions, predict the development of infants and toddlers, but only when the measures of development were based on participant observations of the children over a longer period of time and in the broad context of the natural daycare environment. None of the Subscales, nor the total ECERS predicted social development when it was based on precise time sampling observations, assessed by non participant observers, in interactions between a child and a specific caregiver. Such measures of development were well predicted in our study by caregiver behaviors assessed through Time Sampling Observations.  相似文献   
88.
Forty-five middle-school students with learning disabilities were randomly assigned to one of three reading-comprehension training conditions: (a) summarization training, (b) summarization training with a self-monitoring component, or (c) traditional instruction. All students were interviewed before and after training regarding the strategies they typically employ during reading comprehension; during one training session, "think aloud" protocols were collected. Results indicated that students with learning disabilities trained in summarization procedures performed statistically higher on all dependent measures. In addition, on some transfer measures, students who were trained in the monitoring component statistically outperformed those with only the summarization training.  相似文献   
89.
The successful inclusion of children with developmental concerns in general education classrooms is influenced by the participation of general educators on the teams that support these children. One hundred and forty-eight general education teachers who were serving on teams that support children with developmental concerns in schools were asked to complete the Attitudes About Teamwork Survey, the Team Characteristics Survey, and the Team Process Perception Survey. Respondents held a generally positive attitude about teamwork. Challenges related to scheduling and time for teaming were noted. Central themes emerged relative to perceptions about benefits (discipline collaboration, sharing of knowledge/ideas), limitations (time constraints), and supports (collaboration and supports of individual efforts). Respondents provided recommendations for the improvement of teamwork related to management, organization, and communication. Practical implications of the results and directions for further investigation in this area are discussed.  相似文献   
90.
This paper examines the category of "Woman" within the metastructure of a system of knowledge organization. We trace the subject scheme used to list books about women in a standard bibliographic guide over the first three-quarters of the twentieth century.Building on the feminist critique of subject representation, our analysis documents how the category was continually constructed over time, providing evidence of multiplication, isolation, and confusion in the process. The outcome is a framework that fails to capture the complex nature of knowledge about women and conceals relationships to the larger body of knowledge. The case of this legacy system exemplifies problems associated with representing the complexity and integration of knowledge and provides a basis for considering the potential residual impacts of current information organization and navigation systems.  相似文献   
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