Infants' reasoning about opaque and transparent occluders in an individuation task

There has been some debate about whether infants 10 months and younger can use featural information to individuate objects. The present research tested the hypothesis that negative results obtained with younger infants reflect limitations in information processing capacities rather than the inability to individuate objects based on featural differences. Infants aged 9.5 months saw one object (i.e. a ball) or two objects (i.e. a box and a ball) emerge successively to opposite sides of an opaque occluder. Infants then saw a single ball either behind a transparent occluder or without an occluder. Only the infants who saw the ball behind the transparent occluder correctly judged that the one-ball display was inconsistent with the box-ball sequence. These results suggest that: (a) infants categorize events involving opaque and transparent occluders as the same kind of physical situation (i.e. occlusion) and (b) support the notion that infants are more likely to give evidence of object individuation when they need to reason about one kind of event (i.e. occlusion) than when they must retrieve and compare categorically distinct events (i.e. occlusion and no-occlusion).     

Mind over matter: internalization of the thinness norm as a moderator of responsiveness to norm misperception education in college women.

The authors examine the effectiveness of norm misperception education in decreasing disordered eating. One hundred seven 1st-year college women completed questionnaires assessing their own and others' actual and ideal body size as well as their own disordered eating and were then randomly assigned to read either a norm misperception or a control brochure. Participants completed questionnaires immediately after reading the brochures and again 3 months later. Although there were no main effects of brochure condition at the follow-up, participants who primarily compared themselves with other college women and who read the norm misperception brochure had higher actual and ideal weight as well as less frequent disordered eating. The discussion focuses on the theoretical and applied implications of these findings.     

Using Technology to Deliver Immediate Corrective Feedback to Preservice Teachers

Teacher preparation programs are under scrutiny for their role in the troubled American educational system. If American education is to improve, teacher educators must identify and encourage teachers to use effective teaching practices. A promising technique for increasing use of teaching practices is providing feedback to teachers on newly acquired behaviors. The focus of this study was to examine the effects of immediate corrective feedback on one specific teaching behavior, use of three-term contingencies, to preservice teachers. A multiple baseline design across participants was used to evaluate the effects of immediate corrective feedback, delivered via a wireless FM listening system. Immediate corrective feedback (as compared with delayed feedback) was shown to be an effective way to increase preservice teacher completion of three-term contingency trials by all participants. These findings and other considerations for additional research using feedback are addressed.     

A multimodal data collection tool using REALbasic and Mac OS X

This project uses REALbasic 3.5 in the Mac OS X environment for development of a configuration tool that builds a data collection procedure for investigating the effectiveness of sonified graphs. The advantage of using REALbasic with the Mac OS X system is that it provides rapid development of stimulus presentation, direct recording of data to files, and control over other procedural issues. The program can be made to run natively on the new Mac OS X system, older Mac OS systems, and Windows (98SE, ME, 2000 PRO). With modification, similar programs could be used to present any number of visual/auditory stimulus combinations, complete with questions for each stimulus.     

中国香港双语儿童初步阅读能力与语音、文字加工关系的研究

采用音节检测、短时言语记忆、快速命名等语音加工任务和汉字、字母、数字等方向加工任务,探讨语音和文字加工在儿童初步阅读中的作用,116名6岁左右的香港双语儿童参加了测试。结果表明：语音加工能力是跨语言的比较稳定的因素,是预测汉语和英语阅读的较好指标;文字加工具有特异性．即汉字方向加工只能预测汉语阅读,字母方向加工则预测英语阅读。     

Chronometric comparisons of imagery to action: visualizing versus physically performing springboard dives

Motor imagery research emphasizes similarities between the mental imagery of an action and its physical execution. In this study, temporal differences between motor imagery and its physical performance as a function of performer expertise, skill complexity, and spatial ability were investigated. Physical execution times for springboard dives were compared with visualized execution times. Results indicate that physical and visualized performance times were not identical: Their relation is a function of dive complexity and diver expertise, but not their interaction. Relative to physical time, visualization time increased with increased complexity, suggesting the involvement of capacity-limited working memory. A nonmonotonic relation was found for expertise: Unlike experts or novices, visualization time for intermediates was significantly slower than physical time. These temporal differences are most consistent with schematic differences in skill representation. Intermediates may be relatively slowed by greater amounts of nonautomatized knowledge, as compared with the automatized knowledge of experts or the sparse knowledge of novices.     

Searching for a two-factor model of marriage duration: commentary on Gottman and Levenson

Gottman and Levenson (2002) report a number of post hoc ordinary least squares regressions to "predict" the length of marriage, given that divorce has occurred. We argue that the type of statistical model they use is inappropriate for answering clinically relevant questions about the causes and timing of divorce, and present several reasons why an alternative family of models called duration models would be more appropriate. The distribution of marriage length is not bimodal, as Gottman and Levenson suggest, and their search for a two-factor model for explaining marriage length is misguided. Their regression models omit many variables known to affect marriage length, and instead use variables that were pre-screened for their predictive ability. Their final model is based on data for only 15 cases, including one unusual case that has undue influence on the results. For these and other technical reasons presented in the text, we believe that Gottman and Levenson's results are not replicable, and that they should not be used to guide interventions for couples in clinical settings.     

The improved name game: better use of expanding retrieval practice

Morris and Fritz (2000) demonstrated the effectiveness of the name game as a retrieval-practice based technique for learning the names of group members. We hypothesised that a reversed version of the name game would be even more effective. Performance was contrasted with a no-retrieval condition that mimicked the name game in every way except for the retrieval of the names, allowing an estimate of the specific contribution of retrieval practice. The benefit of a few refresher rounds of the game after 2 weeks was also examined. The reversed name game was superior to the original name game and the refresher rounds benefited all groups. The very considerable superiority of the name game over the no-retrieval condition demonstrated the magnitude of the benefit of expanding retrieval practice.     

Repetition blindness occurs in nonwords

Theorists have predicted that repetition blindness (RB) should be absent for nonwords because they do not activate preexisting mental types. The authors hypothesized that RB would be observed for nonwords because RB can occur at a sublexical level. Four experiments showed that RB is observed for word-nonword pairs (noon noof), orthographically similar nonwords (glome glame), and identical repetitions (plass plass). More RB was found for words than for nonwords. Prior researchers may have failed to find RB for nonwords because display conditions that allow 2 words to be reliably encoded are insufficient for nonwords, or because observers coped with low ability to encode nonwords by using guessing strategies that do not require creating a mental type or tokenizing it.