Experimental analysis of human vocal behavior: applications of speech-recognition technology.

Recent developments in speech recognition make it feasible to apply the technology to study vocal behavior. The present study illustrates the use of this technology to establish functional stimulus classes. Eight students were taught to say nonsense words in the presence of arbitrarily assigned sets of symbols consistent with three three-member experimenter-defined stimulus classes. Computer-controlled speech-recognition software was used to record, analyze, and differentially reinforce vocal responses. When the stimulus classes were established, students were taught to say a new nonsense word in the presence of one member of each stimulus class. Transfer of function was tested subsequently to determine if the novel stimulus names transferred to the remaining stimulus class members. Most subjects required two iterations of the training and testing procedures before transfer occurred. The data illustrate the usefulness of recording vocal behavior during stimulus control procedures and demonstrate the use of speech-recognition technology. The paper also describes the current state of speech-recognition technology and suggests several other areas of research that might benefit from using vocal behavior as its primary datum.

Making sense of sensitivity in the human operant literature.

Human operant behavior is often said to be controlled by different variables or governed by different processes than nonhuman operant behavior. Support for this claim within the operant literature comes from data suggesting that human behavior is often insensitive to schedules of reinforcement to which nonhuman behavior has been sensitive. The data that evoke the use of the terms sensitivity and insensitivity, however, result from both between-species and within-subject comparisons. We argue that because sensitivity is synonymous with experimental control, conclusions about sensitivity are best demonstrated through within-subject comparisons. Further, we argue that even when sensitivity is assessed using within-subject comparisons of performance on different schedules of reinforcement, procedural differences between studies of different species may affect schedule performance in important ways. We extend this argument to age differences as well. We conclude that differences across populations are an occasion for more precise experimental analyses and that it is premature to conclude that human behavior is controlled by different processes than nonhuman behavior.

A behavior analytic interpretation of attributions in the context of behavior therapy.

Clients often provide reasons, justifications, and explanations (i.e., attributions) about the causes of their problems and what they believe needs to be done to ameliorate them. Behavior therapists also frequently generate hypotheses about causal factors contributing to client behavior problems. We discuss the function of attributing in the context of behavior therapy and interpret the cognitive construct of attributions from a behavior analytic perspective as a verbal act of relating otherwise arbitrary events with origins in a social-verbal community. The applied implications of our interpretive analysis of attributions and their role in client problems suggest different therapeutic strategies.

Environment-behavior relations, behavior therapy and the process of persuasion and attitude change.

The phenomena described by the cognitive dissonance literature, especially to explain attitude change, have important relevance to understanding certain aspects of therapy. Contrary to popular beliefs, these phenomena can be described in behavior-analytic terms. To do so requires an analysis of learning histories that select and maintain consistency in what individuals say and do. An understanding of the environmental variables that produce consistency can then be applied to the kinds of attitude change and stability found in the cognitive dissonance literature that have therapeutic importance.

Vicarious learning revisited: a contemporary behavior analytic interpretation.

Beginning in the 1960s, social learning theorists argued that behavioral learning principles could not account for behavior acquired through observation. Such a viewpoint is still widely held today. This rejection of behavioral principles in explaining vicarious learning was based on three phenomena: (1) imitation that occurred without direct reinforcement of the observer's behavior; (2) imitation that occurred after a long delay following modeling; and (3) a greater probability of imitation of the model's reinforced behavior than of the model's nonreinforced or punished behavior. These observations convinced social learning theorists that cognitive variables were required to explain behavior. Such a viewpoint has progressed aggressively, as evidenced by the change in name from social learning theory to social cognitive theory, and has been accompanied by the inclusion of information-processing theory. Many criticisms of operant theory, however, have ignored the full range of behavioral concepts and principles that have been derived to account for complex behavior. This paper will discuss some problems with the social learning theory explanation of vicarious learning and provide an interpretation of vicarious learning from a contemporary behavior analytic viewpoint.

Speed analyses of stimulus equivalence.

The functional substitutability of stimuli in equivalence classes was examined through analyses of the speed of college students' accurate responding. After training subjects to respond to 18 conditional relations, subjects' accuracy and speed of accurate responding were compared across trial types (baseline, symmetry, transitivity, and combined transitivity and symmetry) and nodal distance (one- through five-node transitive and combined transitive and symmetric relations). Differences in accuracy across nodal distance and trial type were significant only on the first tests of equivalence, whereas differences in speed were significant even after extended testing. Response speed was inversely related to the number of nodes on which the tested relations were based. Significant differences in response speed were also found across trial types, except between transitivity and combined trials. To determine the generality of these comparisons, three groups of subjects were included: An instructed group was given an instruction that specified the interchangeability of stimuli related through training; a queried group was queried about the basis for test-trial responding: and a standard group was neither instructed nor queried. There were no significant differences among groups. These results suggest the use of response speed and response accuracy to measure the strength of matching relations.

Applied behavior analysis at West Virginia University: A brief history.

The development of an emphasis on applied behavior analysis in the Department of Psychology at West Virginia University is traced. The emphasis began primarily in the early 1970s, under the leadership of Roger Maley and Jon Krapfl, and has continued to expand and evolve with the participation of numerous behavior analysts and behavior therapists, both inside and outside the department. The development has been facilitated by several factors: establishment of a strong behavioral emphasis in the three Clinical graduate programs; change of the graduate program in Experimental Psychology to a program in basic Behavior Analysis; development of nonclinical applied behavior analysis within the Behavior Analysis program; establishment of a joint graduate program with Educational Psychology; establishment of a Community/Systems graduate program; and organization of numerous conferences. Several factors are described that seem to assure a stable role for behavior analysis in the department: a stable and supportive "culture" within the department; American Psychological Association accreditation of the clinical training; a good reputation both within the university and in psychology; and a broader community of behavior analysts and behavior therapists.

The relationship between stimulus equivalence and verbal behavior.

Despite the apparent similarity between stimulus equivalence and verbal behavior, these phenomena have been described in different terms. With different terminologies for each phenomenon, the precise nature of their relationship is difficult to determine. To explore this relationship, this paper first defines stimulus equivalence using a synthesis of the mathematical definition of the equivalence relation and Sidman and Tailby's (1982) definition. Selected examples of stimulus equivalence are then described as verbal behavior using Skinner's (1957) terminology. The paper then cites instances of verbal behavior that cannot be described as stimulus equivalence and considers whether there are instances of stimulus equivalence that cannot be described as verbal behavior.

Effects of response variability on the sensitivity of rule-governed behavior.

Two experiments examined the relation between response variability and sensitivity to changes in reinforcement contingencies. In Experiment 1, two groups of college students were provided complete instructions regarding a button-pressing task; the instructions stated "press the button 40 times for each point" (exchangeable for money). Two additional groups received incomplete instructions that omitted the pattern of responding required for reinforcement under the same schedule. Sensitivity was tested in one completely instructed and one incompletely instructed group after responding had met a stability criterion, and for the remaining two groups after a short exposure to the original schedule. The three groups of subjects whose responding was completely instructed or who had met the stability criterion showed little variability at the moment of change in the reinforcement schedule. The responding of these three groups also was insensitive to the contingency change. Incompletely instructed short-exposure responding was more variable at the moment of schedule change and was sensitive to the new contingency in four of six cases. In Experiment 2, completely and incompletely instructed responding first met a stability criterion. This was followed by a test that showed no sensitivity to a contingency change. A strategic instruction was then presented that stated variable responding would work best. Five of 6 subjects showed increased variability after this instruction, and all 6 showed sensitivity to contingency change. The findings are discussed from a selectionist perspective that describes response acquisition as a process of variation, selection, and maintenance. From this perspective, sensitivity to contingency changes is described as a function of variables that produce response variability.

The establishment of stimulus control by instructions and by differential reinforcement.

A repeated acquisition design was used to study the effects of instructions and differential reinforcement on the performance of complex chains by undergraduates. The chains required responding on a series of keys that corresponded to characters that appeared on a monitor. Each day, subjects performed a new chain in a learning session and later relearned the same chain in a test session. Experiment 1 replicated previous research by showing that instructional stimuli paired with the correct responses in the learning sessions, combined with differential reinforcement in both learning and test sessions, resulted in stimulus control by the characters in each link. Experiment 2 separated the effects of instructional stimuli and differential reinforcement, and showed that stimulus control by the characters could be established solely by differential reinforcement during the test sessions. Experiment 3 showed that when a rule specified the relation between learning and test sessions, some subjects performed accurately in the test sessions without exposure to any differential consequences. This rule apparently altered the stimulus control properties of the characters much as did differential reinforcement during testing. However, compared to differential reinforcement, the rule established stimulus control more quickly.

The effects of a variety of instructions on human fixed-interval performance.

College students were instructed to press a button for points under a single reinforcement schedule or under a variety of reinforcement schedules. Instructions for a single schedule were either specific or minimal. Instructions on a variety of schedules involved specific instructions on eight different schedules of reinforcement. Subsequent to the varied training, responding under a fixed-interval schedule occurred at a low rate. Both the minimal and specific instruction training led to fixed-interval responding that was similar to the responding exhibited during training. These findings suggest that under certain conditions instructed behavior is sensitive to changes in contingencies.

Verbal relations within instruction: Are there subclasses of the intraverbal?

Six college undergraduates received programmed concept training on three kinds of intraverbal relations. These relations involved definition, exemplification, and example identification questions. The experimenter presented the questions, the subject answered them in writing, and the experimenter provided specific corrective consequences. After completing the training on a concept, the subject immediately received a test on the concept. The test included novel questions similar to the kind used in training (extension tasks) and question types that were not used in training but which were also considered intraverbal relations (transfer tasks). Training results indicated rapid, errorful responding on example identification tasks and slow, accurate responding on exemplification and definition tasks. Test results indicated rapid, errorful responding on example identification extension tasks; slow, accurate responding on exemplification extension tasks; and slow, errorful responding on definition extension tasks. In testing, differential responding occurred on transfer tasks as a function of the kind of intraverbal training received, and substantially lower levels of performance were obtained on transfer tasks than on extension tasks. It appears that the intraverbal can be subdivided into more specific categories of operants.

Designing courseware: Prompts from behavioral instruction.

Behavior analysis has been at the forefront of instructional design for many years. However, this leadership position is rapidly eroding as teachers, trainers and other educators insist that behavioral instruction is good only for meeting simplistic educational goals. I argue that in order for behavior analysis to continue to influence the field of instructional design, behavior analysts need to help people develop instructional programs that use advanced interactive computer systems and that are based on all the components of behavioral instruction. Therefore, this paper suggests the following strategy. First, it teaches people to select authoring systems that will enable them to design interactive computer programs. Second, in order to improve current authoring systems it provides a set of prompts that integrate the features of behavioral instruction. I claim that the integration of these prompts with an advanced authoring system will facilitate the development of complex, conceptual learning programs and minimize current criticisms of behavioral instruction.

Doctoral training in behavior analysis: Training generalized problem-solving skills.

This essay provides guidelines for designing a doctoral program in behavior analysis. First, we propose a general accomplishment for all behavior analytic doctoral students: that they be able to solve problems concerning individual behavior within a range of environments. Second, in order to achieve this goal, we propose that students be trained in conceptual and experimental analysis of behavior, the application of behavioral principles and the administration of behavioral programs. This training should include class work, but it should emphasize the immersion of students in a variety of environments in which they are required to use behavior analytic strategies. Third, we provide an example of a hypothetical graduate program that involves the proposed training. Finally, an evaluation plan is suggested for determining whether a training program is in fact producing students who are generalized problem-solvers. At each step, we justify our point of view from a perspective that combines principles from behavior analysis and educational systems design.

Behavior analysis in instructional design: A functional typology of verbal tasks.

This paper describes and illustrates a typology of verbal instructional tasks for advanced classroom instruction and inservice training. The typology is based upon functional definitions of elementary and conceptual behavior, and incorporates the kinds of goals and objectives that surveys and research have shown to be important for experienced learners. The typology's metastructure is B. F. Skinner's (1957) verbal behavior classification system. This paper describes Skinner's system as a context for understanding and selecting instructional tasks for experienced learners. This paper also discusses rate of response as an important dimension of proficiency or mastery, and procedures for selecting proficiency criteria of tasks in the typology are also described. Results of the first of a series of validation studies indicated that high agreement between typology designer and subjects' classification of tasks can be attained after a short training session. The typology is discussed as a vehicle for standardizing instructional research and practice, and as a basis for research on transfer of control across classes of verbal behavior. Implications for research on building fluency of adult performance, and efficiency in instructional design are also discussed.