Behavioral and associative effects of differential outcomes in discrimination learning

The role of the reinforcer in instrumental discriminations has often been viewed as that of facilitating associative learning between a reinforced response and the discriminative stimulus that occasions it. The differential-outcome paradigm introduced by Trapold (1970), however, has provided compelling evidence that reinforcers are also part of what is learned in discrimination tasks. Specifically, when the availability of different reinforcing outcomes is signaled by different discriminative stimuli, the conditioned anticipation of those outcomes can provide another source of stimulus control over responding. This article reviews how such control develops and how it can be revealed, its impact on behavior, and different possible mechanisms that could mediate the behavioral effects. The main conclusion is that differential-outcome effects are almost entirely explicable in terms of the cue properties of outcome expectancies—namely, that conditioned expectancies acquire discriminative control just like any other discriminative or conditional stimulus in instrumental learning.     

Social transmission of courtship behavior and mating preferences in brown-headed cowbirds,<Emphasis Type="Italic">Molothrus ater</Emphasis>

Studies of the social learning of courtship behaviors and mating preferences of brown-headed cowbirds (Molothrus ater) are reviewed. Earlier work has suggested that cowbirds from behaviorally distinct populations mate preferentially with others from the same population. Studies are described which indicate that patterns of courtship behavior that differ by population can be socially transmitted across generations are described. Social background affects male songs, female preferences for males as mates, and courtship interactions between females and males. Thus, social traditions influence mating decisions and may, ultimately, impact reproductive success in this species. Recent work on possible social mechanisms involved in the ontogeny of courtship behavior is described. The implications of these findings are discussed, and future research directions are suggested.     

Modeling imitation and emulation in constrained search spaces

Social transmission of behavior can be realized through distinct mechanisms. Research on primate social learning typically distinguishes two forms of information that a learner can extract from a demonstrator: copying actions (defined as imitation) or copying only the consequential results (defined as emulation). We propose a decomposition of these learning mechanisms (plus pure individual learning) that incorporates the core idea that social learning can be represented as a search for an optimal behavior that is constrained by different kinds of information. We illustrate our approach with an individual-based model in which individuals solve tasks in abstract “spaces” that represent behavioral actions, results, and benefits of those results. Depending on the learning mechanisms at their disposal, individuals have differential access to the information conveyed in these spaces. We show how different classes of tasks may provide distinct advantages to individuals with different learning mechanisms and discuss how our approach contributes to current empirical and theoretical research on social learning and culture.     

Positive Approaches to Learning in the Context of Preschool Classroom Activities

Positive approaches to learning are considered essential for young children’s school readiness and early school success. Researchers have reported that positive learning approaches, such as attentiveness and goal orientation, are associated with higher levels of early school achievement in math and reading. The present study extends this research by examining children’s learning approaches in the context of classroom activities from a range of curricular areas. Ninety-two children from pre-kindergarten and kindergarten classrooms took part in the study. Four approaches to learning were rated during children’s participation in seven classroom learning activities. Results showed that positive learning approaches were a significant contributor to children’s performance, but they were not equally effective in all activities. The effectiveness of a learning approach depends, in part, on the characteristics of the activity in which the child is engaged. We discuss the implications of these results for understanding the study of learning approaches, and for classroom practices designed to promote their development.     

What is Intended,What is Realized,and What is Learned? Teaching and Learning Biology in the Primary School Classroom

Within the framework of variation theory, 7- to 12-year-old students’ ways of understanding cellular respiration and photosynthesis were investigated against the background of their teachers’ teaching. Eighteen students were selected by the teachers and interviewed by the researcher. Lessons were observed and video recorded, and stimulated-recall interviews with the teachers were conducted. The students’ understanding of the function of oxygen and sugar in plants was described in four categories. The study concludes that young students can develop complex understanding if opportunities to learn are presented. The opportunities depended mainly on the language used by the teachers, such as metaphors, pointing out critical aspects of the object of learning. The study has implications for the relationship between teachers’ competence and students’ learning.     

Interaction of words and nonwordal stimuli in programed sequences of concept-formation tasks

Summary This study suggests that nonwordal sequences can be employed advantageously in teaching certain concepts; trials to criterion, time, and accuracy all favor nonwordal sequences and, in some cases, successive treatment as well. This study indicates the feasibility of replicating aspects of basic concept-formation research in applied subject-matter areas and suggests that terminology from such research is relevant. This study implies that small-group program-development studies which emphasize experimental analysis of behavior can be given an experimental-design emphasis without going to prohibitively high “N’s”; however, results from such a study should be taken as suggestive for more rigorous investigations by others who concentrate on experimental design and comparisons of treatments. Finally, this study demonstrates that research in curriculum design involving the experimental use of new approaches to teaching, stemming from advanced subject-matter frames of reference, can be carried on in conjunction with research in learning; indeed, in the opinion of the investigators, it is unrealistic to separate these dimensions. The need to draft nonwordal stimuli produced a learning sequence which has powerful implications for the teaching of algebra. The research reported herein was supported by a grant from the Office of Education, U.S. Department of Health, Education, and Welfare.     

Evolution of an elemental theory of Pavlovian conditioning

Kenneth Spence (1936, 1937) formalized a quantitative, elemental approach to association theory that has had a broad and dominating influence on learning theory for many years. A set of challenges to the basic approach has spurred the subsequent evolution of elemental theory in various ways. Four of the challenges and some resulting theoretical accommodations are described in the context of Pavlovian conditioning. The evolution involves departures from important specifics of Spence’s theory, but is viewed as demonstrating the utility of the basic, elemental approach that is one of his legacies.     

On the nature of CS and US representations in Pavlovian learning

A significant problem in the study of Pavlovian conditioning is characterizing the nature of the representations of events that enter into learning. This issue has been explored extensively with regard to the question of what features of the unconditioned stimulus enter into learning, but considerably less work has been directed to the question of characterizing the nature of the conditioned stimulus. This article introduces a multilayered connectionist network approach to understanding how “perceptual” or “conceptual” representations of the conditioned stimulus might emerge from conditioning and participate in various learning phenomena. The model is applied to acquired equivalence/distinctiveness of cue effects, as well as a variety of conditional discrimination learning tasks (patterning, biconditional, ambiguous occasion setting, feature discriminations). In addition, studies that have examined what aspects of the unconditioned stimulus enter into learning are also reviewed. Ultimately, it is concluded that adopting a multilayered connectionist network perspective of Pavlovian learning provides us with a richer way in which to view basic learning processes, but a number of key theoretical problems remain to be solved, particularly as they relate to the integration of what we know about the nature of the representations of conditioned and unconditioned stimuli.     

Real-time factors in the rabbit’s nictitating membrane response to pulsed and serial conditioned stimuli

Conditioning theories and recent real-time models commonly postulate that a reinforcer is signaled by a series of stimuli. In both Pavlovian and operant procedures, serial stimuli have been shown to control the likelihood and timing of responses over intervals of seconds and minutes. The present experiments were conducted to determine whether serial stimuli exercise similar effects over stimulus-reinforcer intervals in the order of hundreds of milliseconds. Such intervals typify those used in conditioning of the rabbit nictitating membrane response. A sequence of four tone pulses (50–100 msec) was used as the CS to assess the effectiveness of serial stimuli. After training with this CS, tests were conducted in which one or more of the pulses were removed. These perturbations of the sequence of stimuli over a 400-msec interval produced large deficits in CR likelihood and smaller alterations in CR timing. The results are discussed with respect to their implications for current real-time models of conditioning, and particularly with respect to their assumptions about the source of internal stimuli, rules for learning, and rules for generating CRs.     

Changing roles and identities in the construction of a community of mathematical inquiry

In the current shifts in mathematics classrooms, teachers are challenged to use effective pedagogy to develop inquiry communities in which all participants are offered opportunities to engage in the reasoning discourse of proficient mathematical practices. The challenge for teachers is to know how to implement these pedagogical changes. This article outlines how a teacher and researcher worked together in a collaborative partnership using a purposely designed communication and participation framework as a tool to scaffold development of collective reasoning in the inquiry community. The findings illustrate the interconnections between the teacher’s beliefs, past experiences, and current, and future expectations for her diverse students. Explanations are provided of how different, often conflicting, voices emerged including one that drew on the teacher’s cultural knowledge. This provided many learning opportunities for the researcher as the teacher developed her students’ voices in culturally appropriate ways.     

Perceptual learning with tactile stimuli in rodents: Shaping the somatosensory system

The animal kingdom contains species with a wide variety of sensory systems that have been selected to function in different environmental niches, but that are also subject to modification by experience during an organism’s lifetime. The modification of such systems by experience is often called perceptual learning. In rodents, the classic example of perceptual learning is the observation that simple preexposure to two visual stimuli facilitates a subsequent (reinforced) discrimination between them. However, until recently very little behavioral research had investigated perceptual learning with tactile stimuli in rodents, in marked contrast to the wealth of information about plasticity in the rodent somatosensory system. Here we present a selective review of behavioral analyses of perceptual learning with tactile stimuli, alongside evidence concerning the potential bases of such effects within the somatosensory system.     

Personalizing e-Learning. The Social Effects of Pedagogical Agents

Numerous studies have evaluated the effects of pedagogical agents on students’ learning outcomes, but so far, beneficial effects have not been consistently demonstrated. The ambiguous results might partly be due to the strong emphasis on cognitive outcomes, which is characteristic for research in teaching and learning. The paper suggests a shift of attention to socio-emotional and relational variables, which might be considered as relevant moderator variables in learning or even as learning outcomes per se, for example, in social learning. In order to achieve this goal, we suggest a systematic account of the results from social psychology and in particular from nonverbal communication research, and findings from studies on the social effects of embodied agents in general. This perspective will include (1) a distinction between static and dynamic aspects of embodiment, such as the visual appearance of agents and their nonverbal behavior, and (2) a more systematic approach concerning the functions of embodiment and nonverbal behavior, such as modeling, discourse and dialogue functions, and socio-emotional effects. A further argument addresses the necessity of complementing outcome measures by process measures, which are sensitive to the tasks and the changing situational demands that occur during learning processes and tutor-learner interaction.     

An interdisciplinary theory of behavior

This paper combines biological, biochemical and psychological data toward the construction of a bio-psychological theory of behavior. The fundamental assumptions are that the environment favored the evolution of organisms possessing receptors sensitive to periodic or repetitive stimuli. Moreover the presence of periodic stimuli in space and time have induced, through natural selection, the appearance of highly advanced forms of living organisms capable of exploiting the environment by utilizing information in periodic stimuli. Indeed, this dependency on periodic stimulation, such as light energy and movement of surrounding matter, has induced a psychological, perceptual bias to readily assimilate repetitive stimuli thereby producing changes in behavior. This perceptual bias favored by organic evolution and reinforced by stimulation of the organism during development produces communication patterns in higher animals characterized by repetitive sounds. The relationship of this theory to current learning models is discussed and applications are made to human learning.     

Maternal Attitudes and Parent Education: How Immigrant Mothers Support Their Child’s Education Despite Their Own Low Levels of Education

A study of Mexican immigrant mothers of young children in the AVANCE-Dallas early childhood intervention program demonstrates that low-educational parents often exhibit ambitious attitudes about educational achievement for their children. Though they lack an extensive academic background, which places their children at risk for low education, their positive attitude manifested in daily pro-educational behaviors overcomes their low education level because they both motivate their children to pursue academic success and participate in their children’s learning. The best way to capitalize on immigrant parents’ educational drive for their children is to partner with them—either through an intervention program or through early childhood educators’ interaction with parents—by showing them how their participation in their children’s learning through concrete activities (such as regular mother–child conversation, daily reading, and playtime activities that teach developmental skills) may increase their chances of achieving academic success.     

Agents control in intelligent learning systems: The case of reactive characteristics

Intelligent learning systems (ILSs) have evolved in the last few years basically because of influences received from multi-agent architectures (MAs). Conflict resolution among agents has been a very important problem for multi-agent systems, with specific features in the case of ILSs. The literature shows that ILSs with cognitive or pedagogical agents are prone to arbitration methods, where as ILSs with reactive agents are much in favor of control mechanisms. For these kind of systems, different control types are proposed based on the different stimuli that these agents will receive. These stimuli are aspects to be evaluated during the teaching/learning process such as: (1) error analysis, (2) learning styles, (3) analogies, (4) social aspects, etc.

The paper reviews several ILSs, related to our work; different control mechanisms are proposed to solve the agents' intervention conflicts. Finally, the use of several mechanisms is exemplified by the results of a specific ILS.     

Epistemological beliefs and epistemic strategies in self-regulated learning

How do epistemological attitudes and beliefs influence learning from text? We conceptualize epistemological attitudes and beliefs as components of metacognitive knowledge. As such, they serve an important function in regulating the use of epistemic strategies such as knowledge-based validation of information and checking arguments for internal consistency. We report results from two studies that investigated the effects epistemological attitudes and beliefs on the use of epistemic strategies in academic learning and the motivational states that mediate these effects. Study 1 (N = 289) tested a mediation model with epistemological attitudes (separate vs. connected knowing) and textual characteristics as distal predictors, and learning goals (learning factual knowledge vs. developing an own standpoint) as mediator variables. Separate knowing had large indirect effects on the use of epistemic strategies via the goal to develop an own point of view. In addition, learners adapted their learning goals and epistemic strategies depending on objective characteristics and the perceived familiarity of the texts they read. In Study 2 (N = 124), epistemological beliefs concerning the uncertainty of knowledge increased the use of epistemic strategies only when extrinsic study motivation was low. A mediated moderation model established this effect to be mediated by specific epistemic curiosity. These results illuminate the mechanisms of how epistemological attitudes and beliefs affect self-regulated learning. In contrast to other types of learning strategies, the use of epistemic strategies seems to be strongly and consistently linked to epistemological attitudes and beliefs.     

The nature of the response in simon discriminations by pigeons

Spence (1952) postulated that under some conditions, responding in simple discriminations is controlled by compounds or patterns consisting of the nominal discriminative cue, plus its spatial position. Stimulus control by such compounds was said to develop when no single cue or element was systematically reinforced more than any other. This analysis has been applied to good effect in understanding some peculiar accuracy results obtained from pigeons performing Simon discrimination tasks. This article describes how Spence's cue-position analysis provides a better account of pigeons' performance in this task than do nominal cue-only and configurational views of the functional discriminative stimuli. Adding a value transfer assumption improves the ability of the cue-position hypothesis to account for the accuracy data.     

Programme guidelines: effective and ineffective school-based sex and HIV / AIDS education programmes

In several countries, despite considerable opposition to sex and HIV/AIDS education programs, school-based reproductive and sexual health education is gradually gaining ground. It has expanded to include adolescent and sexual health. There exist positive trends and evident changes in the delivery of school-based reproductive and sexual health education. Among these are the following: 1) systemic and deliberate incorporation of adolescent reproductive and sexual health issues in the school curriculum in countries that have UN Population Fund population programs; 2) inclusion of reproductive and sexual health issues in different subjects, which paves the way for their incorporation into the curriculum; 3) continuous improvement in the delivery, content, methodologies and activities of population education, particularly the inclusion of topics concerned with reproductive and sexual health and greater emphasis on the behavioral and skills development; and 4) the growing nongovernmental organization involvement in the provision of reproductive and sexual health education and training. Numerous factors ensure the success of the programs; they are the use of social learning and cognitive behavioral theory and clear mission statements, communication and negotiation practical exercises, values formation, interactive strategy development, effective training, behavior change--particularly with regard to risk-taking behavior, and provision of a supportive environment.     

The nature of discrimination learning in pigeons

The results from five experiments are considered in relation to two of Spence's (1937, 1938) proposals concerning discrimination learning. In Experiments 1 and 2, we investigated whether his ideas about the interaction between excitatory and inhibitory generalization gradients can be used to understand how animals solve a complex patterning discrimination. The results supported a development of his proposals as put forward by Pearce (1994), provided a modification was made to Pearce's rulefor determining the shape ofthe generalization gradient. In Experiments 3, 4, and 5, we examined whether animals would pay more attention to stimuli that are relevant, rather than irrelevant, to the solution of a discrimination. The results supported this proposal for stimuli comprising visual patterns, but not for those comprising plain colors. The results also indicated that change of attention was a consequence of preliminary receptor-exposure acts, as envisaged by Spence, and not of more central changes in attention.     

The Effects of Modeling and Ambiguity Tolerance on Interview Behavior

Ambiguity tolerance is a learner characteristic that can affect the processing of stimuli in a wide range of learning situations, including modeling. It has also been shown to be related to effective counselor interview behavior. This study investigated the influence of differences in ambiguity tolerance and the effects of exposure to a videotape model on the interview behavior of counselor trainees. A two-way analysis of variance gave limited support to the hypothesis that counselor trainees would exhibit significantly more effective interview behaviors as a result of the interaction of high ambiguity tolerance and exposure to a model. It may be that video models can be used to diminish differences in counseling performance among high and low ambiguity tolerant counselors. The potential of creating a variety of learning strategies, such as video modeling, to override the detrimental effects of certain personality characteristics is discussed.