The relation of multiple-schedule behavioral contrast to deprivation,time in session,and within-session changes in responding     

McSweeney FK  Swindell S  Murphy ES  Kowal BP 《Learning & behavior》2004,32(2):190-201

Pigeons' keypecking was reinforced by food on baseline schedules of multiple variable interval (VI) x VI x and on contrast schedules of multiple VI x VI y. Deprivation of food was varied by maintaining subjects at 75%, 85%, and 95% (+/- 2%) of their free-feeding weights. Positive and negative behavioral contrast were observed. The size of the contrast was not systematically altered by changes in deprivation. Positive and negative contrast were both larger later in the session than they were earlier. Within-session decreases in responding were steeper for the baseline than for the contrast schedules for positive contrast. Within-session decreases were steeper for the contrast than for the baseline schedules for negative contrast. These results were predicted by the idea that different amounts of habituation to the reinforcer during the baseline and contrast schedules contribute to behavioral contrast. The results show that contrast occurs under conditions that reduce the effect of the following component. The results support the assumption that positive and negative contrast are produced by symmetrical theoretical variables.  相似文献   

Naming speed deficits in adults with reading disabilities: a test of the double-deficit hypothesis     

Vukovic RK  Wilson AM  Nash KK 《Journal of learning disabilities》2004,37(5):440-450

The present study investigated the persistent nature of naming speed deficits within the context of the double-deficit hypothesis in a university sample of adults with reading disabilities (RD). Twenty-five university students with RD were compared to 28 typically achieving readers on measures of reading skill, phonological processing, and naming speed. The results indicated that both naming speed and phonological processing deficits characterized the RD group. In a regression analysis, neither naming speed nor phonological processing were important variables in explaining comprehension when reading rate was in the model. The results of the present study are mixed at best and are consistent with earlier conclusions that support for the double-deficit hypothesis of dyslexia remains limited.  相似文献   

Book reviews     

Roberts Braden  R. Scott Grabinger  Brent Wilson  David H. Jonassen 《Educational technology research and development : ETR & D》1988,36(1):35-42

  相似文献   

Youth and culture: A seventeen nation study of perceived problems and coping strategies     

Janice T. Gibson  Marvin J. Westwood  F. Ishu Ishiyama  William A. Borgen  Susan M. Showalter  Qasem Al-Sarraf  Semiha A. Atakan  Isaura R. F. Guimares  A. Lina Guisti-Ortiz  Margaret Robertson  Benjamin Shafrir  Peter De Weerdt  Gundelina A. Velazco  Carol E. Baker  Maria Dikaiou  Tatiana Gabay  Lina Kashyup  Ilona Lee  Maria E. Felce Di Paula  Hillman Ngunangwa  Nina F. Talyzina 《International journal for the advancement of counseling》1991,14(3):203-216

  相似文献   

The role of student-generated externalizations in strategic multimedia learning and how current (web-)technology fails to support learner engagement     

Rolf Ploetzner  Benjamin Fillisch  Patrick-André Gewald  Tatjana Ruf 《Interactive Learning Environments》2016,24(7):1610-1628

In two studies, we investigated how learning strategies can support learning from multimedia. In the first study, 112 students learned from a web-based learning environment. On the basis of a strategy, one group of students took typewritten notes. The second group of students wrote a summary. Producing typewritten notes did not benefit learning any more than writing a summary. In the second study, 100 students learned the same subject matter from print. On the basis of a strategy, the first group produced written notes, the second group highlighted, wrote notes, and produced sketches. The third group wrote a summary. The students who highlighted, wrote notes, and produced sketches outperformed the other students. The students who produced written notes only did not learn more successfully than those who wrote a summary. The results suggest that externalizations in general and sketches in particular may play an important role in multimedia learning.  相似文献   

Working memory for sign language: a window into the architecture of the working memory system     

Wilson M  Emmorey K 《Journal of deaf studies and deaf education》1997,2(3):121-130

Traditionally, working memory has been divided into two major domains: verbal and visuo-spatial. The verbal domain of working memory can be characterized either by its relationship to language or by its grounding in auditory processing. Because of this ambiguity, languages that are not auditory and vocal (i.e., signed languages) pose a challenge to this conception of working memory. We describe several experiments with deaf users of American Sign Language (ASL) that explore the extent to which the architecture of working memory is determined by the constraints of auditory and visual processing and the extent to which it is determined by the characteristics of language. Various working memory effects were investigated: phonological similarity, word length, and articulatory suppression. The pattern of evidence strongly supports the existence of a sign-based 'rehearsal loop' mechanism parallel to the speech-based rehearsal loop. However, we also discuss evidence pointing to differences between the speech loop and the sign loop from forward and backward digit span tasks with deaf and hearing subjects. Despite their similarities based on linguistic properties, the speech loop and the sign loop appear to diverge due to the differing processing demands of audition and vision. Overall, the results suggest that the architecture of working memory is shaped both by the properties of language structure and by the constraints imposed by sensorimotor modality.  相似文献   

The Louisville Twin Study: developmental synchronies in behavior   总被引：4，自引：0，他引：4  

R S Wilson 《Child development》1983,54(2):298-316

The Louisville Twin Study includes nearly 500 pairs of twins and their siblings who have participated in a longitudinal study of mental development, beginning in infancy and extending to adolescence. The results show that individual differences beginning in infancy and extending to adolescence. The results show that individual differences in intelligence progressively stabilized by school age, and each child followed a distinctive pattern of spurts and lags in mental development. Monozygotic twins became increasingly concordant over ages and matched each other closely for developmental trends. By contrast, dizygotic twins regressed to an intermediate level of concordance, comparable with that found for siblings and parent-offspring sets. A comprehensive home assessment was performed to identify the home/family variables that contributed to mental development. The overall results pointed to a strong developmental thrust in the growth of intelligence, which was principally guided by an intrinsic genetic ground plan. Qualitative features of home and family did, however, add significantly to prediction of offspring IQ. The results are interpreted in the context of Waddington's developmental model, and some recent advances in neurobiology and genetics are surveyed for their implications for developmental behavior genetics.  相似文献   

A healthy investment?     

Wilson C 《New scientist (1971)》2003,178(2394):25

  相似文献   

Extending children's reading skills in the primary school     

Margaret Mary Wilson 《Literacy》1985,19(3):167-171

  相似文献   

Quality Control for Teachers Designing Materials     

G. V. Wilson 《British journal of educational technology : journal of the Council for Educational Technology》1974,5(3):73-74

  相似文献