Deafness and mother–child interaction: Scaffolded instruction and the learning of problem-solving skills

This study examines the effects of maternal teaching style on the developing problem-solving abilities of deaf and hearing pre-school children. Mothers and children from three matched groups, hearing mother-deaf child, hearing mother-hearing child, and deaf mother-deaf child, were videotaped while the mother instructed the child on a block construction task and again when the child attempted the task independently. Dependent measures were maternal instructional style and child performance. The mothers in the deaf mother-deaf child and hearing mother-hearing child dyads used appropriate scaffolding behaviour and their children were more likely to exhibit adept and independent problem-solving abilities than the deaf children of hearing mothers. The findings of this study support Vygotsky's notion of the ‘zone of proximal development’ and the concept of adult scaffolding of children's learning.     

Picture Naming Deficits in Developmental Dyslexia: The Phonological Representations Hypothesis

The picture and word naming performance of developmental dyslexics was compared to the picture and word naming performance of non-dyslexic (“garden variety”) poor readers, reading age, and chronological age-matched controls. The stimulus list used for both tasks was systematically manipulated for word length and word frequency. In order to examine picture naming errors in more depth, an object name recognition test assessed each subject's vocabulary knowledge of those names which they were unable to spontaneously label in the picture naming task. Findings indicated that the dyslexic and the garden variety poor readers exhibited a picture naming deficit relative to both chronological and reading age-matched controls. Findings also indicated that both groups of impaired readers obtained superior scores in the word naming task than in the picture naming task, while both groups of controls showed no difference in performance across tasks. The dyslexics' picture naming errors, but not those of the garden variety poor readers, were particularly marked on polysyllabic and/or low frequency words, indicating a possible phonological basis to the picture naming deficit of the dyslexic children. These children also recognized significantly more unnamed target words than all comparison groups, suggesting a particular difficulty inretrievingthe phonological codes of known picture names rather than a vocabulary deficit. Results are discussed in terms of dyslexics' difficulty in encoding full segmental phonological representations of names in long-term memory and/or in processing these representations in order to generate required names on demand.     

Phonological and motoric demands in handwriting: evidence for discrete transmission of information

In an experiment with handwriting tasks effects of phonological and motoric task factors upon reaction time and movement time were measured to test implications of a discrete information processing account of the task. The model is built up of serially organized stages, each of which monitors one specific type of operation, necessary to generate a message. The serial structure of the model is defined as the limitation that higher levels of the model provide their output to the next lower processor in the hierarchy, and receive their input from the next higher stage. The parallel character of the model is exemplified through the assumption that all processors are active at the same time and concurrently with the real time production of writing movements. The study adds evidence that a serial architecture of processors can be compatible with the parallel processing of a message as long as more abstract operations are prepared more in advance to real-time movements than operations lower in the hierarchy. In the experiment the prediction was tested that the time course of the manifestation of phonological and motoric task demands reflects the discrete and serial structure of the model.     

Preschool Children's Collaborative Problem-Solving Interactions: The Role of Gender,Pair Type,and Task

The purpose of this study was to investigate gender differences in problem-solving and conflict-resolution skills in preschool children. Children between 4 and 5 years of age completed 3 problem-solving tasks with either a same-sex or a different-sex peer. Children's verbal and nonverbal interactions were analyzed. Girls used mitigation more often than did boys. Mixed-sex dyads engaged in controlling verbal interactions more often than same-sex dyads. There were relationships between verbal and nonverbal behaviors and task success; these relationships also differed across pair types. The results of the study demonstrate that the gender differences in types of verbal interactions previously observed in preschool children's free play are also present in their problem-solving interactions and that children are able to alter the types of behaviors they use depending upon both partner gender and the type of task involved.     

Learning letter names and sounds: Effects of instruction, letter type, and phonological processing skill

Preschool-age children (N = 58) were randomly assigned to receive instruction in letter names and sounds, letter sounds only, or numbers (control). Multilevel modeling was used to examine letter name and sound learning as a function of instructional condition and characteristics of both letters and children. Specifically, learning was examined in light of letter name structure, whether letter names included cues to their respective sounds, and children’s phonological processing skills. Consistent with past research, children receiving letter name and sound instruction were most likely to learn the sounds of letters whose names included cues to their sounds regardless of phonological processing skills. Only children with higher phonological skills showed a similar effect in the control condition. Practical implications are discussed.     

Cross‐Linguistic Differences in Digit Memory Span

This study investigated whether the better performance of the Chinese in digit memory span tasks was due only to the shorter pronunciation duration of Chinese digit names, or to enhanced visuospatial sketchpad abilities, or to both. Results of the experiment showed that the Chinese outperformed their Malay counterparts in digit memory span tasks because Chinese digit names had shorter pronunciation durations than Malay digit names and not because the Chinese had better visuospatial sketchpad abilities than the Malays. The results thus support Baddeley's phonological loop hypothesis as an account for cross‐linguistic differences in digit memory spans. Because memory traces are subject to decay and the phonological store is temporally limited, the shorter the pronunciation duration of digit names in a language, the more digits one can rehearse within a limited time period, and therefore the larger is one's short‐term digit span in that language.     

New Insights into the role of the phonological loop in task switching: evidence from three different age groups

ABSTRACT

The phonological loop plays an important role in task switching. Until now, however, it has been unclear whether it is the maintenance of the task sequence or the retrieval of the task goal that requires phonological processing. In the present study, 60 participants (20 children, 20 adolescents, 20 young adults) performed three phonological working-memory tests before they switched between two tasks in a cue-present condition (random task sequence) and in a cue-absent condition (predictable task sequence). Results revealed that better phonological and central-executive working-memory performance predicted lower switch costs. In line with age-differentiation of cognitive abilities switching was less coupled with working memory in adults compared to children and adolescents. Interestingly, however, relations were only demonstrated in the cue-present but not in the cue-absent condition, indicating that it is more the retrieval of the task goal than the maintenance of the task sequence that requires the involvement of phonological processing.     

Subliminal repetition primes help detection of phonemes in a picture: Evidence for a phonological level of the priming effects

In this research, we combine a cross-form word–picture visual masked priming procedure with an internal phoneme monitoring task to examine repetition priming effects. In this paradigm, participants have to respond to pictures whose names begin with a prespecified target phoneme. This task unambiguously requires retrieving the word-form of the target picture's name and implicitly orients participants' attention towards a phonological level of representation. The experiments were conducted within Spanish, whose highly transparent orthography presumably promotes fast and automatic phonological recoding of subliminal, masked visual word primes. Experiments 1 and 2 show that repetition primes speed up internal phoneme monitoring in the target, compared to primes beginning with a different phoneme from the target, or sharing only their first phoneme with the target. This suggests that repetition primes preactivate the phonological code of the entire target picture's name, hereby speeding up internal monitoring, which is necessarily based on such a code. To further qualify the nature of the phonological code underlying internal phoneme monitoring, a concurrent articulation task was used in Experiment 3. This task did not affect the repetition priming effect. We propose that internal phoneme monitoring is based on an abstract phonological code, prior to its translation into articulation.     

言语产生中的词长效应

采用图片命名方法考察言语产生中的词长效应,并进而分析语音计划的单位和序列性。选取能同时用单音节(如“羊”)和双音节(“山羊”)命名的图片作刺激材料,发现双音节命名明显慢于单音节命名,这种效应既表现在首音节型(如“花”与“花朵”),也表现在尾音节型(如“羊”与“山羊”)刺激材料上。研究结果支持语音编码从左到右、系列提取和双音节词的词音计划单位大于单音节词的观点。该文还对图片命名中的频率效应进行了事后分析。     

Effects of Instructional Style on Problem-Solving Creativity

This study sought to determine the impact of 2 differing instructional approaches on creative problem-solving performance. Eighty-two college students completed a novel structure-building task after receiving algorithmic instruction (providing a rote, step-by-step algorithm for building a sample structure), heuristic instruction (demonstrating the same techniques in a more flexible form), or no instruction. All participants viewed the same sample structure before beginning the task. It was hypothesized that algorithmically instructed students would exhibit less exploratory behavior and lower levels of creativity than students receiving heuristic instruction. No specific hypotheses were made concerning the problem-solving creativity of students in the no-instruction condition. Results suggest that the type of instruction that students received influenced their perceptions of the task, their behaviors during the task, and their final solution to the structure problem. Students receiving algorithmic instruction exhibited greater confidence and speed when building their structures than did other students. However, they were significantly less likely to engage in exploratory behavior or to deviate from the sample structure than were students receiving heuristic instruction. Although there was no main effect of instruction condition on the judge-rated creativity of these structures, a significant interaction between instruction type and participants' attempts to replicate the sample structure was predictive of the structure's creativity. Theoretical and practical implications of these and other results are discussed.     

Fostering Creativity in the Classroom: Effects of Teachers' Epistemological Beliefs,Motivation, and Goal Orientation

The relationships of teachers' epistemological beliefs, motivation, and goal orientation to their instructional practices that foster student creativity were examined. Teachers' perceived instructional practices that facilitate the development of multiple perspectives in problem solving, transfer, task commitment, creative skill use, and collaboration were measured as indicators of their effort to foster creative thinking in students. Participants were 178 elementary‐school teachers of third‐, fourth‐, and fifth‐graders. Teachers' learning goal orientation was the most significant teacher attribute that demonstrated significant impacts on all five creativity‐fostering instructional practices. Teachers with sophisticated beliefs about knowledge and with high intrinsic motivation for creative work also reported supporting student creativity through some of their instructional practices. However, teachers' motivation for challenging work, beliefs about learning, or performance goals did not significantly predict most of the creativity‐fostering instructional practices. Educational implications of the current findings are offered.     

Remembering computer command names: Effects of subject generation versus experimenter imposition

Two experiments analyzed the effectiveness of goal statements in aiding recall of self-generated as opposed to experimenter-imposed command names. Subjects were presented with a series of before-after pairs representing the computer states before and after a command was executed. In Experiment 1, during study, one group of subjects generated a command name in response to each pair; a second group generated a goal statement describing the goal to be accomplished in addition to generating a command name. During recall, half of each group was required to recall the name, whereas the other half was required to describe the goal before attempting to recall the name. In Experiment 2, during study, command names (and goals for those subjects in the goal condition) were imposed by the experimenter rather than generated by the subject. Subjects who generated goals and names recalled more command names than did those who generated only names or who received imposed goals and/or names. Generation of an appropriate goal at study improved encoding by helping subjects to select more appropriate command names; generation of an appropriate goal at test improved retrieval for appropriate names only, presumably by activating a relevant subset of names. Even in the relatively simple task of naming and remembering command names, having an appropriate model of the domain through the use of specific goal statements substantially improved performance.     

From print to sound in mature readers as a function of reader ability and two forms of orthographic regularity

Four experiments using college students as subjects provide evidence that both highly skilled and less skilled mature readers derive the names of printed words from visual access of the lexicon rather than by phonological recoding. Regularity of pronunciation (regular vs. exception words) as a variable of orthographic regularity effectiveafter visual code formation had no effect either between or within reading ability groups. Less skilled readers made more errors and were slower than highly skilled readers on both types of words. Sing-letter spatial redundancy, as a variable of orthographic regularity that influences the formation of visual codes, served to differentiate the two groups only in naming nonwords. Highly skilled readers used spatial redundancy to offset the effect of array length, whereas less skilled readers did not. Except for high-frequency words, visual access and retrieval of the pronunciation of words was significantly faster for highly skilled readers. Less skilled readers were most disadvantaged in naming nonwords, a task that requires phonological recoding. Overall results support the hypothesis that reading ability in mature readers is related to the speed of word recognition. Highly skilled readers may make more use of variables of orthographic regularity effective in the formation of visual codes.     

Quality of phonological representations, verbal learning, and phoneme awareness in dyslexic and normal readers

This study of dyslexia was concerned with the quality of phonological representations of lexical items. It extended the studies of verbal learning in dyslexia from learning new vocabulary items (pseudo-names) to the learning of more well-specified variants of known words. The participants were 19 dyslexic adolescents in grades 4 to 6 and 19 younger normal readers in grade 2 matched on single word decoding. The dyslexics were significantly outperformed by the reading-age controls in non-word reading and in phoneme awareness. The dyslexics also took longer time to learn to associate a set of pseudo-names with pictures of persons although the dyslexics learned to associate familiar names with pictures as quickly as the controls did. The acquisition of new phonological representations of words was studied in an imitation task with maximally distinct pronunciations of long, familiar words. The dyslexics gained less than the controls in this task. They also gained less on one measure taken from a phoneme substitution task with the same words as in the distinctness task. The results are interpreted in the light of the hypothesis that poorly specified phonological representations may be an underlying problem in dyslexia.     

Memory development in Libyan and Dutch school children

Cross-cultural similarities and differences in memory were examined in two studies with Libyan and Dutch school children of two different grades. The first study analysed effects of word length and pronunciation speed on recall. Baddeley's phonological loop hypothesis could fully account for the somewhat larger digit span of the Dutch children. The second study investigated effects of rehearsal training on recall. Experimental groups showed a higher performance increase after training than did control groups; Libyan children with the same pretest scores as Dutch children showed higher posttest scores, which could be a consequence of sample differences in age or test-wiseness. The studies demonstrated that current theories provide more precise explanations of cross-cultural differences in structural memory features than in control processes. Implications for instructional practice are discussed.     

Visual and phonological components of working memory in children

Previous studies have shown that young children's immediate memory for a short series of drawings of objects is mediated by a visual component of working memory, whereas older children rely chiefly upon a phonological component. Three experiments investigated the hypothesis that older children rely also, but to a lesser extent, on visual working memory. Experiment 1 confirmed previous evidence that 11-year-olds' memory is disrupted by phonemic similarity of object names, but is unaffected by visual similarity of the objects themselves. However, when articulatory suppression was used to prevent phonological coding, levels of recall were sensitive to visual rather than phonemic similarity. Experiment 2 compared the effects of interpolating an auditory-verbal or a visual postlist task on memory for drawings viewed either with or without suppression. The visual task had a clear disruptive effect only in the suppression condition, where it interfered selectively with recall of the most recent item. Experiment 3 compared the effects of interpolating an auditory-verbal or a mixed-modality (visual-auditory) postlist task when subjects were not required to suppress. There was greater interference from the mixed-modality task, and this effect was confined to the last item presented. These experiments are taken as confirming the presence of a small but reliable contribution from visual memory in 11-year-old children's recall. As in younger children, visual working memory in 11-year-olds is sensitive to visual similarity and is responsible for a final-item visual recency effect. The results also show that older children's use of visual working memory is usually masked by the more pervasive phonological component of recall. Some implications for the structure of working memory and its development are discussed.     

4~8岁儿童认知风格的发展及其对问题解决的影响

认知风格是个体获取和加工信息的一贯模式,影响诸多认知活动。本研究测量了98名4-8岁儿童的认知风格和积木拼图中的问题解决行为,主要发现:（1）4-8岁儿童总体上表现为整体型认知风格,但分析型认知风格随着年龄增长在逐渐发展;（2）认知风格影响问题解决策略：越偏整体型认知风格的儿童越多使用主体参照策略（即先拼主体图形再补充其他部分）,并且越少使用线索推断策略（按照行/列的线索顺序依次拼图）和局部定位策略（根据某一局部图案的具体位置摆放积木）。本实验首次探索了低龄儿童认知风格的年龄差异,发现认知风格在发展早期就已影响问题解决行为。研究结果有助于理解儿童认知风格的发展及其作用,为儿童问题解决能力的培养实践提供一定的理论依据。     

Working memory capacity predicts the beneficial effect of selective memory retrieval

Selective retrieval of some studied items can both impair and improve recall of the other items. This study examined the role of working memory capacity (WMC) for the two effects of memory retrieval. Participants studied an item list consisting of predefined target and nontarget items. After study of the list, half of the participants performed an imagination task supposed to induce a change in mental context, whereas the other half performed a counting task which does not induce such context change. Following presentation of a second list, memory for the original list's target items was tested, either with or without preceding retrieval of the list's nontarget items. Consistent with previous work, preceding nontarget retrieval impaired target recall in the absence of the context change, but improved target recall in its presence. In particular, there was a positive relationship between WMC and the beneficial, but not the detrimental effect of memory retrieval. On the basis of the view that the beneficial effect of memory retrieval reflects context-reactivation processes, the results indicate that individuals with higher WMC are better able to capitalise on retrieval-induced context reactivation than individuals with lower WMC.     

Counting knowledge and skill in cognitive addition: a comparison of normal and mathematically disabled children.

The relationship between counting knowledge and computational skills (i.e., skill at counting to solve addition problems) was assessed for groups of first-grade normal and mathematically disabled (MD) children. Twenty-four normal and 13 MD children were administered a series of counting tasks and solved 40 computer-administered addition problems. For the addition task, problem-solving strategies were recorded on a trial-by-trial basis. Performance on the counting tasks suggested that the MD children were developmentally delayed in the understanding of essential and unessential features of counting and were relatively unskilled in the detection of certain forms of counting error. On the addition task, the MD children committed many more computational errors and tended to use developmentally immature counting procedures. The immature counting knowledge of the MD children, combined with their relatively poor skills at detecting counting errors, appeared to underlie their poor computational skills on the addition task. Suggestions for future research are presented.     

Verbal and visual instruction with mental retardation: The role of subject characteristics and task factors

Past research and theory presents an inconsistent picture concerning the relative value of verbal versus visual instructional programs for individuals with mental retardation. From an empirical perspective, there is evidence that this inconsistency may be due to the differences in the type of tasks and the specific abilities of the subjects employed across studies. In this research, the effects of three instructional procedures (verbal, visual, and verbal plus visual) were evaluated with mentally retarded persons who varied in verbal and visual ability. Performance was examined on a visual task which incorporated stimuli of varying degrees of familiarity to the subjects. The results indicated that the use of the combined verbal-visual instruction procedure was more effective than the other two training programs when task stimuli were familiar to the subjects. When task stimuli were unfamiliar, instructional procedures which had a visual component were found to be superior to a procedure which employed only the use of verbal component. The subjects' visual ability was most strongly associated with performance outcome when visual instruction was employed and unfamiliar task stimuli were sorted. In contrast, subjects' verbal ability appeared to be equally important across instructional and task conditions. The implications of the results for the design of instructional programs and for future research are discussed.