A connectionist account of asymmetric category learning in early infancy

Young infants show unexplained asymmetries in the exclusivity of categories formed on the basis of visually presented stimuli. A connectionist model is described that shows similar exclusivity asymmetries when categorizing the same stimuli presented to infants. The asymmetries can be explained in terms of an associative learning mechanism, distributed internal representations, and the statistics of the feature distributions in the stimuli. The model was used to explore the robustness of this asymmetry. The model predicts that the asymmetry will persist when a category is acquired in the presence of mixed category exemplars. An experiment with 3-4-month-olds showed that asymmetric exclusivity persisted in the presence of mixed-exemplar familiarization, thereby confirming the model's prediction.     

Explanation-based learning in infancy

In explanation-based learning (EBL), domain knowledge is leveraged in order to learn general rules from few examples. An explanation is constructed for initial exemplars and is then generalized into a candidate rule that uses only the relevant features specified in the explanation; if the rule proves accurate for a few additional exemplars, it is adopted. EBL is thus highly efficient because it combines both analytic and empirical evidence. EBL has been proposed as one of the mechanisms that help infants acquire and revise their physical rules. To evaluate this proposal, 11- and 12-month-olds (n?=?260) were taught to replace their current support rule (that an object is stable when half or more of its bottom surface is supported) with a more sophisticated rule (that an object is stable when half or more of the entire object is supported). Infants saw teaching events in which asymmetrical objects were placed on a base, followed by static test displays involving a novel asymmetrical object and a novel base. When the teaching events were designed to facilitate EBL, infants learned the new rule with as few as two (12-month-olds) or three (11-month-olds) exemplars. When the teaching events were designed to impede EBL, however, infants failed to learn the rule. Together, these results demonstrate that even infants, with their limited knowledge about the world, benefit from the knowledge-based approach of EBL.     

Unconscious perception and reverie: an intersubjective connection*

This paper discusses an intriguing topic for psychoanalysis: the concept of unconscious communication. Beginning with the concept of unconscious perception, it moves on to figurability and culminates with reverie. Auxiliary concepts, such as receptive unconscious, intersubjectivtiy, countertransferrence and empathy, are discussed in order to articulate the conceptual network on which theoretical arguments are based.     

Beyond doer and done to: an intersubjective view of thirdness

Analytic work based on the intersubjective view of two participating subjectivities requires discipline rooted in an orientation to the structural conditions of thirdness. The author proposes a theory that includes an early form of thirdness involving union experiences and accommodation, called the one in the third, as well as later moral and symbolic forms of thirdness that introduce differentiation, the third in the one. Clinically, the concept of a co-created or shared intersubjective thirdness helps to elucidate the breakdown into the twoness of complementarity in impasses and enactments and suggests how recognition is restored through surrender.     

Interventions in early infancy

Infants of high-risk pregnancies and deliveries may need early intervention to facilitate attachment both to and from their caregivers. Three early interventions are described: (1) giving high-risk pregnant women video feedback during prenatal ultrasound, which reduced maternal anxiety, obstetric complications, and fetal activity and improved neonatal outcome (increased weight gain, better performance on the Brazelton, and decreased irritability); (2) providing preterm neonates nonnutritive sucking opportunities to reduce stress during heelsticks and gavage feedings; and (3) providing preterm neonates and preterm cocaine-exposed neonates massage therapy, which facilitated weight gain and better performance on the Brazelton scale. Following improved neonatal behavior, infants would be expected to have better interactions with their caregivers.     

Visual statistical learning in infancy: evidence for a domain general learning mechanism

The rapidity with which infants come to understand language and events in their surroundings has prompted speculation concerning innate knowledge structures that guide language acquisition and object knowledge. Recently, however, evidence has emerged that by 8 months, infants can extract statistical patterns in auditory input that are based on transitional probabilities defining the sequencing of the input's components (Science 274 (1996) 1926). This finding suggests powerful learning mechanisms that are functional in infancy, and raises questions about the domain generality of such mechanisms. We habituated 2-, 5-, and 8-month-old infants to sequences of discrete visual stimuli whose ordering followed a statistically predictable pattern. The infants subsequently viewed the familiar pattern alternating with a novel sequence of identical stimulus components, and exhibited significantly greater interest in the novel sequence at all ages. These results provide support for the likelihood of domain general statistical learning in infancy, and imply that mechanisms designed to detect structure inherent in the environment may play an important role in cognitive development.     

From object to subject: pastoral supervision as an intersubjective activity

The author sketches the development of psychoanalysis in terms of its trends from notions of objectivity to intersubjectivity and how this movement can inform contemporary pastoral supervision. The article argues that these same trends may be noted in the development of contemporary educational and theological theories.     

Visual feature binding in early infancy

How does the developing brain of the human infant solve the feature-binding problem when visual stimuli consisting of multiple colored objects are presented? A habituation--dishabituation procedure revealed that 1-month-old infants have the ability to discriminate changes in the conjunction of a familiar shape and color in two objects. However, this good earlier performance was followed by poorer performance at 2 months of age. The performance improved again at 3 months of age. Detailed analysis of the oculomotor behaviors revealed that the age of 2 months was a period of drastic transition when the tendency to stay with the fixated objects disappeared and repetitive saccades between the two objects emerged. Our findings suggest that the ability to perceive conjunctions of features is available to infants very early, that the perceptual/neural basis at 1 and at 3 months of age may be fundamentally different, and that feature integration by vigorous eye movements or selective attention may be the key functional difference between the age groups.     

A componential analysis of an early learning deficit in mathematics

This study was designed to assess strategy choice and information-processing differences in normal and mathematically disabled first and second grade children. Twenty-three normal and 29 learning disabled (LD) children solved 40 computer-presented simple addition problems. Strategies, and their associated solution times, used in problem solving were recorded on a trial-by-trial basis and each was classified in accordance with the distributions of associations model of strategy choices. Based on performance in a remedial education course, as indexed by achievement test scores, the LD sample was reclassified into a LD-improved group and an LD-no-change group. No substantive differences comparing the normal and LD-improved groups occurred in the distribution of strategy choices, strategy characteristics (e.g., error rates), or rate of information processing. The performance characteristics of the LD-no-change group, as compared to the two remaining groups, included frequent counting and memory retrieval errors, frequent use of an immature computational strategy, poor strategy choices, and a variable rate of information processing. These performance characteristics were discussed in terms of the strategy choice model and in terms of potential long-term memory and working memory capacity deficits. In addition, implications for remedial education in mathematics were discussed.     

Medical family therapy: an emerging arena for family therapy

This paper describes an important recent development in American family therapy. Medical family therapy uses a biopsychosocial systems model to work with families who have a member with a chronic illness or disability. The authors maintain that family therapy has tended to embrace the mind–body split and to view itself too narrowly as a mental health specialty. Medical family therapists work collaboratively with physicians and other health professionals to help families achieve a sense of agency and communion in facing some of the greatest challenges that life brings.     

Isolated words enhance statistical language learning in infancy

Infants are adept at tracking statistical regularities to identify word boundaries in pause-free speech. However, researchers have questioned the relevance of statistical learning mechanisms to language acquisition, since previous studies have used simplified artificial languages that ignore the variability of real language input. The experiments reported here embraced a key dimension of variability in infant-directed speech. English-learning infants (8-10 months) listened briefly to natural Italian speech that contained either fluent speech only or a combination of fluent speech and single-word utterances. Listening times revealed successful learning of the statistical properties of target words only when words appeared both in fluent speech and in isolation; brief exposure to fluent speech alone was not sufficient to facilitate detection of the words' statistical properties. This investigation suggests that statistical learning mechanisms actually benefit from variability in utterance length, and provides the first evidence that isolated words and longer utterances act in concert to support infant word segmentation.     

Central and peripheral vision in early infancy

The size of the effective visual field during the first weeks of life is found to depend on two factors: It increases with age, but it contracts in the face of competition from ongoing activity such as fixation of a central stimulus or non-nutritive sucking.     

Changes in imitative behavior during early infancy

Changes in imitative behavior and attentiveness were observed in 40 infants when they were 2 to 6 months of age. The facial expressions happy, sad, and surprised were modeled in a trials-to-criterion procedure, and the infants' looking time and mouth movements were recorded by an observer who was unaware of the face being modeled. In addition, the observer recorded her guess as to the expression being modeled by the corresponding expression on the infant's face and rated the infant's expressivity. The results suggested that looking time, correspondence between the mouth expression of the infant and the mouth expression modeled, accuracy of the observer's guess, and expressivity ratings decreased from 2 to 3 and 4 to 6 months. Although matching of mouth movements with the modeled mouth movements and accuracy of guesses were greater than chance over the 2 to 6 month-period, the decreases in these measures suggest that imitative behavior declined across early infancy. The decrease in looking time suggests that imitative behavior and attentiveness may be related and highlights the limitation of this paradigm for assessing the development of imitation during early infancy.     

How objectivity undermines the study of personhood: Toward an intersubjective epistemology for psychological science

As a science, psychology embraces the value of objectivity. An objective observation is one that is (a) based upon publically observable phenomena (i.e., overt behavior); (b) unbiased, in the sense that it records only what was observed, without either adding or taking away from the observation, and (c) an accurate representation of the world as it truly is. To understand the person, however, it is necessary to come to grips with seemingly elusive concepts such as agency, symbolism, experience, meaning, inter-subjectivity, and morality. Such concepts make reference to phenomena that are not observable in way that one can observe objects in the physical world of space and time. In this paper, I examine how psychology's commitment to objectivity obscures our ability to understand persons. A remnant of the Cartesian distinction between a mind and body, the principle of objectivity forces psychologists to seek “objective” indicators of “subjective” processes. Following Wittgenstein and recent research on the mirror resonance system, I argue that psychological knowledge arises neither from within (subjectively) nor from without (objectively), but instead from between (intersubjectively). To understand what it means to be a person, we must abandon the false distinction between objectivity and subjectivity, and embrace an epistemology based on intersubjectivity.     

Communication in collaborative discovery learning

Background. Constructivist approaches to learning focus on learning environments in which students have the opportunity to construct knowledge themselves, and negotiate this knowledge with others. Discovery learning and collaborative learning are examples of learning contexts that cater for knowledge construction processes. We introduce a computer‐based learning environment in which the two forms of learning are implemented simultaneously. We focus on the interaction between discovery learning and collaborative learning. Aim. We aim to investigate which communicative activities are frequently used in the discovery learning process and which communicative and discovery activities co‐occur. Sample. The study involved 21 pairs of 10th‐grade students enrolled in pre‐university education, ranging from 15 to 17 years of age. Method. Participants worked in dyads on separate screens in a shared discovery learning environment. They communicated using a chat box. In order to find a possible relationship between communicative activities and discovery learning processes, correlational analysis and principal component analysis were performed. Result. Significant relationships were found between communicative and discovery activities, as well as five factors combining the communicative process and the discovery learning processes. Communicative activities are performed most frequently during the activities in generating hypotheses, experimental design, and conclusion construction. Argumentation occurs less than expected, and is associated with the construction of conclusions, rather than generating hypotheses. Conclusion. Communicative activities co‐occur with discovery activities most of the time, as we expected. Further research should concentrate on means to augment communicative and discovery activities that are related to positive learning outcomes.