Children and adults' distance estimations in a large-scale environment: effects of time and clutter

In two experiments adults (mean age = 19-5), sixth graders (mean age = 11-8), fourth graders (mean age = 9-8), and second graders (mean age = 7-8) walked a straight line distance through a large-scale environment. Subjects were then asked to estimate the time taken to traverse each half of the walk and to estimate the distance between objects seen along the walk. In Experiment 1 each half of the walk was traversed in the same amount of time but contained a different number of objects (clutter). Time and distance estimates were related, but were not affected by the number of intervening objects encountered between locations. In Experiment 2 subjects again encountered a different number of objects along each half of the walk but each half was traversed in varying amounts of time. Again, time and distance estimates were related, and there was no clutter effect. There were no consistent developmental differences across the two experiments. It was concluded that (1) Thorndyke's clutter effect does not occur across all types of spatial cognition tasks, and (2) children and adults tend to relate time and distance across a variety of distance estimation tasks.     

Self-directed attention and the comparison of self with standards

Several theorists have assumed that self-directed attention causes a comparison between one's present behavior or state and whatever is salient and relevant as a standard of comparison. Indirect evidence bearing on this assumption was gathered in a series of four studies by monitoring subjects' tendencies to access concrete information needed to make such behavior-standard comparisons. Self-focus was varied in two of these studies by experimental manipulations: a mirrored surface, and a live observer. In the other two studies, self-focus was operationalized in terms of subjects' dispositional tendencies to direct attention to themselves (self-consciousness). Consistent with expectations, in Experiments 1 and 2, self-directed attention led to increased frequency of referring to drawings of geometric figures when attempting to reproduce them. In Experiments 3 and 4, self-focused attention increased subjects' tendencies to seek out information about ostensible performance norms reflecting the behavior of other subjects, also as predicted.     

Hierarchical planning disability in the drawings and constructions of a special group of severely aphasic children

A small group of severely receptive aphasic children who appear to be suffering from a rare aphasic syndrome that has been referred to in the literature as "acquired aphasia with convulsive disorder in children" was tested on drawing and construction tasks which tap hierarchical planning abilities. Although they could draw and construct a complex figure when using a serial method, they could not do so when required to use hierarchical planning in building up the model in terms of its subunits. Their scores reflecting hierarchical ability were significantly lower than those of age-matched profoundly deaf and normal children. The nature of this disability is discussed and its effects noted on tasks in other modalities. It is argued that neither an auditory deficit theory nor a short-term memory deficit theory is adequate to account for the observed disabilities. Individual differences in the group were noted. It was also found that a smaller percentage of developmentally expressive aphasic children evidenced the hierarchical planning disability. It is concluded that a primary hierarchical planning disability in some aphasic children can account for some aspects of their linguistic disabilities and for disabilities on other nonlanguage and nonauditory tasks.     

Conditional reasoning and the competence-performance issue: A developmental analysis of a training task

Empirical investigations of conditional reasoning have generally found that both children and young adults perform poorly on tasks that require the selection or evaluation of those propositions that test the truth status of conditional statements (if p then q). Earlier work (D. O'Brien & W. F. Overton, Journal of Experimental Child Psychology 1980, 30, 44–60) suggested that poor performances with these tasks by young adults show improvement following the introduction of evidence that contradicts earlier faulty inferences, and this improvement generalizes to other conditional reasoning tasks. The effects of the contradiction training were not found with younger subjects. The present research is an extension of the contradiction training paradigm. Ten-, fourteen-, and eighteen-year-olds were tested to assess developmental differences in improvement with an evaluation and a conditional syllogism task. Significant improvement in performance was found for the twelfth grade students following the contradiction training, and this generalized across tasks. This effect was not found for the two younger groups. The usual poor performance of the oldest group is considered to be a false negative assessment of their conditional reasoning competency. Further, it is suggested that several correct performances of younger reasoners are false positive assessments of their conditional reasoning competency.     

Distraction,amnesia, and the next-in-line effect

Two studies use a free recall task to track, moment by moment, cognitive repercussions of an upcoming performance. As in earlier research, subjects display impaired recall for events which immediately precede an anticipated public performance. This “next-in-line effect” occurs even if the “performance” consists of reading a word to oneself. However, subjects show no memory deficit if their performance is not anticipated, and they have generally poor recall if they know they will be performing—but not when. Distraction and amnesia accounts of these recall deficits are discussed. Ancillary findings illuminate the organization of memory in social settings.     

Surface dyslexia: A case report and some theoretical implications to reading models

This paper reports on the psycholinguistic investigation of a surface dyslexic aphasic patient's abilities to handle written material. The analysis of paralexic errors produced in reading aloud single words and nonwords classically suggested that the patient was using an analytical strategy parsing the letter string stimulus, from left to right, into graphemes, and assigning phonemic values to graphemes. The patient's results were found to be sensitive to irregularities in correspondence between graphemes and phonemes not only in reading aloud but in lexical decisions, writing on dictation, rhyming, and written-word comprehension. Moreover, the patient's linguistic behavior brought out the reverse pattern observed in deep-dyslexic performances within word/nonword and content/function word dimensions. It was found that some semantic information about written words could be retrieved from both phonological and nonphonological processes presumably operating concurrently and both providing converging or conflicting pieces of meaning to the understanding of written words. Some considerations derived from the observation of this pathological reading behavior are discussed, contributing to a psycholinguistic model of normal reading.     

Necessary versus sufficient causal schemata: Attributions for achievement in difficult and easy tasks

Previous research on Kelley's schemata for multiple sufficient and multiple necessary causes has failed to examine the hypothesis that a schema influences both predictions of an event and attributions of its causes. This research examined the effects of the difficulty of a hypothetical exam on predictions of exam grades, and on attributions of ability and effort. Exam difficulty influenced both the pattern of judgments of grades and reported beliefs in multiple necessary versus multiple sufficient causes. Contrary to the predictions of the schema theory, exam difficulty had little influence on the pattern of attributions of ability and effort. Kelley's concept of a causal schema is reinterpreted in terms of current views of human judgment, and the possible implications of the data for the interpretations of a causal schema are examined. The results question the assumption that attributions are based on beliefs about how causes combine to determine an effect, and suggest further research on the relationship between predictions and attributions.     

Rule learning in children: Multiple-set training and intermediate-size transposition

Two experiments were conducted in which the subjects were trained to choose the middle-size stimulus in either a single stimulus set or in each of two nonoverlapping stimulus sets. Following criterion, each subject was presented with a series of 12 test trials involving a new stimulus set. In Experiment 1, kindergarten children tended to choose the middle-size test stimulus if the test set consisted of stimuli intermediate in size to the stimuli in the smaller and larger training sets. When the test stimuli were all larger than any of the training stimuli, the probability of choosing the middle-size stimulus increased as the distance between the two training sets increased. Three groups of children participated in Experiment 2: a kindergarten group, a first-grade group, and a first-grade group that experienced middle-size training a year earlier. The distance between training sets and two training procedures affected the three groups in a similar manner during acquisition, but several interactions were obtained during the test. The findings were discussed in terms of the Lane and Rabinowitz (D. M. Lane & F. M. Rabinowitz, Child Development, 1977, 48, 412–426) rule based theory of intermediate-size transposition and suggestions were made as to how children acquire the concept of middle.