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1.
An information-processing analysis of children's accuracy in predicting the appearance of rotated stimuli 总被引：2，自引：0，他引：2
Children's ability to discriminate reflections and rotations of visual stimuli was examined using a kinetic imagery task. It was hypothesized that success would be related to the number and placement of orientation markers on the stimuli, as well as whether or not reflections had to be discriminated from simple rotations. 40 4- and 5-year-old children were directed to imagine how a stimulus would look if rotated to a specified location and asked to indicate the appearance of the reoriented stimulus by selecting the correct option from a number of foils. 48 of the items required only discrimination of a reoriented stimulus. The other 48 also required discrimination of a reflection of the reoriented stimulus. Stimuli differed in the number of orientation cues on the edges of the figures. Results revealed that prediction accuracy was associated with the existence of orientation markers on the stimuli, as well as age, sex, type of discrimination, and several interactions among the variables. Findings were discussed in comparison to a priori predictions based on an analysis of how children might use orientation information when performing mental rotation tasks. 相似文献
2.
C B Fisher 《Child development》1979,50(4):1088-1092
Some have interpreted children's reliance on external visual cues as evidence that they are unable to use internal cues for orientation. This hypothesis was examined in experiment 1, where 24 preschoolers were tested on left-right, vertical-horizontal, and mirror-image oblique discriminations under essentially context-free conditions. Subjects succeeded on all discrimination problems and performed equally well on vertical-horizontal and mirror-image oblique discriminations. Thus, preschoolers can use an internal frame of reference to code orientation. Experiment 2 contrasted children's performance under context-free conditions with their ability to discriminate orientation in the presence of external visual cues. Children who had discriminated left-right oblique and nonoblique mirror-image forms in experiment 1 failed to so discriminate in experiment 2. This result is discussed in terms of a breakdown in the ability to use internal cues when external visual cues are available. 相似文献
3.
Color discrimination ability can be determined through anatomy or perceptual ability. In this study we tested perceptual ability. Three Asian small-clawed otters (Aonyx cinerea), one male and two females, were trained via operant conditioning to discriminate stimuli within a training task. If they passed criteria for this task, they were tested on as many as six delayed matching-to-sample experimental tasks. These experimental tasks involved comparing varying saturations of the colors blue, green, and red against varying shades of gray, as well as against each other. The male reached criterion on five of the experimental tasks, indicating an ability to discriminate the stimuli. One female participated in only two tasks and did not achieve the criteria as set. The second female did not pass the training task, and thus was not experimentally tested. This study overall showed some early evidence that Asian small-clawed otters may have the ability to learn to discriminate different stimuli on the basis of color cues. Sensory studies conducted on two other otter species and the results of this study indicate that color vision may be a common trait across Lutrinae species. 相似文献
4.
We trained 7 pigeons to discriminate visual displays of 16same items from displays of 16different items. The specific stimulus features of the items and the relations among the items could serve as discriminative stimuli.
Unlike in most studies of same-different discrimination behavior, we gave a small number of probe tests during each session
of acquisition to measure the time-course of control by the learning of specific stimulus features and relational cues. Both
the specific stimulus features and relational cues exerted reliable stimulus control, with the specific stimulus features
exerting more control during the final three fourths of same-different learning. These findings replicate research suggesting
that pigeons encode both the specific stimulus features and relational cues, and for the first time document the time-course
of control by each kind of cue. 相似文献
5.
These experiments examined one way in which the allocation of attentional resources can change performance during a visual discrimination task. Pigeons were trained to discriminate visual forms under conditions that produced dimensional contrast. In three experiments, negative training stimuli differed from positive stimuli either along a primary physical dimension alone or along both a primary dimension and an orthogonal dimension. When a negative stimulus differed from positive stimuli along two dimensions, discrimination of that negative stimulus improved. For one type of visual form, discrimination of the positive stimuli declined with orthogonal variation in a negative stimulus, whereas for other visual forms, there was no decline in performance. These results are consistent with a model of dimensional contrast that suggests that differences in the allocation of attentional resources determine discrimination performance. The results also indicate that the organization of stimulus dimensions plays a crucial role in the allocation of attentional resources in these settings. 相似文献
6.
Six experiments examined children's ability to make inferences using temporal order information. Children completed versions of a task involving a toy zoo; one version required reasoning about past events (search task) and the other required reasoning about future events (planning task). Children younger than 5 years failed both the search and the planning tasks, whereas 5-year-olds passed both (Experiments 1 and 2). However, when the number of events in the sequence was reduced (Experiment 3), 4-year-olds were successful on the search task but not the planning task. Planning difficulties persisted even when relevant cues were provided (Experiments 4 and 5). Experiment 6 showed that improved performance on the search task found in Experiment 3 was not due to the removal of response ambiguity. 相似文献
7.
Barry J. Zimmerman 《Contemporary educational psychology》1978,3(1):11-19
A social learning explanation for children's conceptual development is proposed. Recent training research on conservation is discussed, and it is concluded that it fails to support three key assumptions underlying Piaget's theory (a) Children are able to learn to conserve without being “in transition,” (b) nonconservation experiences are successful in promoting developmentally immature cognitive functioning, and (c) there is evidence of inconsistencies in children's cognitive functioning across tasks assessing the same cognitive stage. Two aspects of children's conservation responding are explained according to a social learning position: decalages and the shift from perceptual cues to quantitative cues. This explanation involves consideration of cognitive factors such as prior rule learning as well as impinging social experience. 相似文献
8.
Dave G. Mumby Tom J. Kornecook Emma R. Wood John P. J. Pinel 《Learning & behavior》1995,23(4):447-453
Two experiments assessed whether odors left on stimulus objects by experimenters who handle them might confound the interpretation of ostensibly visually guided object-memory tasks for rats. In Experiment 1, rats were able to discriminate the relative recency with which an experimenter touched two otherwise identical objects (intertouch interval = 4 sec), presumably on the basis of an odorintensity discrimination. However, after the rats mastered the odor discrimination with no delay between when the second of the two stimulus objects was last touched by the experimenter and when the rats were permitted to attempt the discrimination, their performance dropped to chance levels when this delay was increased to 15 sec. In Experiment 2, rats were trained in two slightly different ways to perform a delayed-nonmatching-to-sample (DNMS) task, one that involved systematic differences in the temporal order in which the experimenter handled the sample and novel stimulus objects and one that did not. There were no significant differences in the rate at which rats mastered the DNMS task with these two procedures, and the performance of rats that were trained according to the former procedure was unaffected when they were switched to the latter procedure. Moreover, rats required considerably fewer trials to master the DNMS task than the rats in Experiment 1 required to master the odor discrimination. These findings demonstrate that, under certain circumstances, rats can discriminate the relative recency with which two objects are handled by an experimenter, but that this ability contributes little to their performance of conventional object-based DNMS tasks. 相似文献
9.
Rosemary A. Rosser John Mazzeo Patricia F. Horan 《Contemporary educational psychology》1984,9(2):135-145
In this examination of young children's acquisition of geometric skills, spatial performances were conceptualized as specific combinations of actions applied within stimulus contexts. Since both actions and context can vary, a number of different combinations can be specified. In this study, the relationships among eight such combinations were examined and predicted patterns compared with observed ones. Fifty-four 3-, 4-, and 5-year-old children were presented with 24 geometric displays depicting a variety of geometric relations. Subjects were required to either match or recall the displays in both a reconstruction and a recognition task format thereby responding across different types of action demands. The geometric displays depicted information organized either around a single axis (horizontal or vertical) or around both axes, the variation in context. The results of a mixed design ANOVA revealed a good fit with the hypothesized predictions. The findings are discussed in terms of the development of spatial skills, information theory, and of skill generalization. 相似文献
10.
We investigated the effect of associating unique contextual cues with an interpolated learning task on retroactive interference in long-term memory. Rats were originally trained in a two-bar operant chamber with an auditory conditional discrimination stimulus. During interpolated learning, which occurred in either the original or a new context, some rats were trained on a probability learning task that did not include the auditory stimuli present during original learning. Subsequent retraining on the original conditional discrimination task in the original context showed that (1) significant retroactive interference occurs in rats, and (2) the presence of unique contextual cues during interpolated learning significantly reduces this interference. These results extend the conditions under which the susceptibility to retroactive interference can be altered by contextual cues. 相似文献
11.
We investigated whether pigeons are able to discriminate color photographs of male and female pigeons, using a categorical
discrimination procedure. In Experiments 1 and 2B, 10 out of 14 pigeons learned the discrimination. Of these, 5 pigeons showed
transfer to novel stimuli, demonstrating the categorical nature of the trained discrimination. Experiment 3 showed that the
discriminative behavior was based primarily on the body, as opposed to the head and the neck region. In 1 out of 3 pigeons,
the discriminative behavior was maintained by the black-and-white photographs. The results suggest that some pigeons have
the ability to discriminate the sex of conspecifics without behavioral cues. 相似文献
12.
Pamela M. Smith 《教育心理学》1993,13(2):107-118
Children aged 4 to 10 years old were asked to draw a person standing absolutely still and a person walking very fast so that someone not present would know from the pictures alone what had been depicted. Even at four some children were able to convey the difference to a viewer and there was increasing success with age. The number of differentiating cues increased with age and there was an age‐related trend in the order in which specific cues appeared in the drawings. The ability of the children to respond flexibly to the task gives no support to notions of rigid mental representations determining what young children can draw. It is argued that contrast tasks are a useful tool for investigating problem solving skills in the domain of drawing and could be used to extend children's skill by providing an occasion for explicit dialogue about how representational information is conveyed to a viewer. 相似文献
13.
A bottlenose dolphin was trained to discriminate two simultaneously presented stimuli differing in numerosity (defined by
the number of constituent elements). After responding correctly to stimuli consisting of three-dimensional objects, the dolphin
transferred to two-dimensional stimuli. Initially, a variety of stimulus parameters covaried with the numerosity feature.
By systematically controlling for these stimulus parameters, it was demonstrated that some of these attributes, such as element
configuration and overall brightness, affected the animal’s discrimination performance. However, after all the confounding
parameters were under control, the dolphin was able to discriminate the stimuli exclusively on the basis of the numerosity
feature. The animal then achieved a successful transfer to novel numerosities, both intervening numerosities and numerosities
outside the former range. These findings provide substantial evidence that the dolphin could base his behavior on the numerosity
of a set independently of its other attributes and that he represented ordinal relations among numerosities. 相似文献
14.
Experiments were designed in which some properties of spatial representations in rats could be examined. Adult subjects were trained to escape through a hole at a fixed position in a large circular arena (see Schenk, 1989). The experiments were conducted in the dark, with a limited number of controlled visual light cues, in order to assess the minimal cue requirement for place learning. Three light cues identical in shape, height, and distance from the table were used. Depending on the condition, they were either permanently on or alternatively on or off, contingent on the position of the rat in the field. Two questions were asked: (1) How many identical visual cues were necessary for spatial discrimination in the dark, and (2) could rats integrate the relative positions of separate cues, under conditions in which the rat was never allowed to perceive all three cues simultaneously. The results suggest that rats are able to achieve a place discrimination task even if the three cues necessary for efficient orientation can never be seen simultaneously. A dissociation between the discrimination of the spatial position of the goal and the capacity to reach it by a direct path suggests that, with a reduced number of cues, prolonged locomotion might be required for accurate orientation in the environment. 相似文献
15.
Advocates of modality preference posit that individuals have a dominant sense and that when new material is presented in this preferred modality, learning is enhanced. Despite the widespread belief in this position, there is little supporting evidence. In the present study, the authors implemented a Morse code–like recall task to examine whether visual and auditory recall is moderated by modality preference. When the perceptual discriminability of visual and auditory stimuli was controlled for, there was no significant relation between (a) modality preference and (b) visual and auditory recall. The nature of the task did however effect performance. When a temporal discrimination between stimuli was required, recall for auditory stimuli was superior to recall of visual stimuli. In contrast, when the task involved a spatial discrimination, the opposite effect was observed. It is not surprising that in each recall task, sequences with a discernible pattern were recalled more accurately than were sequences that lacked any obvious pattern. The authors concluded that the ability to recall simple material is determined more by the type of stimulus than by the preferences of the individual. 相似文献
16.
There is evidence that humans' perception of time is affected by the activity in which they are engaged while they are timing. The more demanding the task, the faster time appears to pass. A similar effect has been found in pigeons. Pigeons trained to discriminate between a short-duration (2-sec) and a long-duration (10-sec) stimulus were required to peck when the stimulus was one color and to refrain from pecking when it was a different color. On probe trials of intermediate durations, the bisection point (50% choice of the stimulus associated with both long and short stimuli) for trials in which the pigeons were required to peck was almost 1 sec longer than on trials in which the pigeons were required to refrain from pecking (Zentall, Friedrich, & Clement, 2006). In the present research, we replicated this effect and determined the relation between this effect and the typical bisection point that occurs when pecking is permitted but not required. Results indicated that the typical procedure results in a bisection point that is between required pecking and refraining from pecking. Furthermore, the rate of pecking when pecking is allowed but not required also falls between the rate of pecking for the required-pecking and refrain-from-pecking conditions. This result suggests that, similar to humans, pigeons underestimate the passage of time when they are active or when attention to time-related cues has to be shared with attention to satisfying the response requirement. 相似文献
17.
Thomas R. Kratochwill Roger A. Severson Dennis M. Demuth 《Contemporary educational psychology》1978,3(2):144-153
Results of two artificial letter learning experiments are reported. In Experiment 1, 229 preschool children were randomly assigned to one of five conditions: Two-dimensional small print size (2DS), two-dimensional large print size (2DL), two-dimensional large where subject traced stimuli mounted on cards (3DL), or three-dimensional large stimuli where subject was directed to manipulate stimuli during the first study trial (3DLM). Errors in the 3DLM condition were significantly less than in 2DS, 2DLT, and 3DL. Also, errors in the 2DL condition were significantly less than in 2DS. A replication experiment with kindergarten children failed to show any differences among the treatments. Results are discussed in terms of stimulus dimensions and motor involvement in children's letter learning. Implications for instruction and future research are noted. 相似文献
18.
K A Loveland 《Child development》1987,58(4):928-936
Children with Down syndrome (DS) and normally developing (ND) children of comparable mental age (16-32 months) were compared in their ability to find things seen in the mirror. Tasks included finding a rouge mark on the face, finding the mother, finding a toy, as well as free play before the mirror. The 2 groups were found to be equally likely to solve each task and did not differ in pattern of tasks solved or amount of prompting to notice the stimulus. With increasing mental age, both groups required less prompting and were more likely to locate the stimulus. Children with and without DS were not equally interested in particular tasks, and children with DS were more attentive to the mirror overall, whereas ND children tended to lose interest more rapidly in some task situations. The significance of incorrect strategies in searching for the reflected mother or toy was also examined. It was concluded that the ability of children with DS to solve different kinds of mirror tasks paralleled that of ND children, but that motivational, attentional, and exploratory differences may exist. 相似文献
19.
Three extrinsic factors were manipulated in a problem-solving task performed by 80 10-year-old children of IQ 90–110. The factors were: The presence or absence of the name of the concept given in feedback, specific instructions, and whether the child was allowed to verbalize. The task was a modification of Vygotsky's experiment on concept formation using concrete material. The performance criteria were: time taken to solution, number of moves, and amount of verbalization. The presence of the name of the concept given in feedback speeded the time to solution and reduced the number of moves required. Specific instruction speeded the solution but did not reduce the number of moves; whereas verbalization reduced the number of moves but increased the time of solution. 相似文献
20.
Dale H. Schunk 《Contemporary educational psychology》1983,8(1):76-86
How social comparative information and specific, proximal goals influence children's skillful performance and percepts of self-efficacy in the context of arithmetic competency development was explored. Low-achieving children in arithmetic received instruction in division and practice opportunities. One group was provided with social comparative information indicating the average number of problems solved by other children. A second group worked under conditions involving a goal of completing a given number of problems. A third group received both treatments, and a fourth group received neither treatment. Results yielded a significant main effect on perceived efficacy due to proximal goals. Children who received both goals and comparative information demonstrated the highest level of division skill. Results suggest exploring in greater detail how children weight and combine multiple sources of efficacy information. 相似文献