Although researchers are exploring animals' capacity for monitoring their states of uncertainty, the use of some paradigms allows the criticism that animals map avoidance responses to error-causing stimuli not because of uncertainty monitored but because of feedback signals and stimulus aversion. The authors addressed this criticism with an…

The purpose of this experiment was to compare components of the human and rat auditory event-related potential (ERP) in a serial feature-positive discrimination task. Subjects learned to respond to an auditory target stimulus when it followed a visual feature (X [right arrow] A+), but to not respond when it was presented alone (A-). Upon solving…

This paper examines concepts in information-processing theory which are likely to be relevant to development and characterizes the methods and data upon which the concepts are based. Among the concepts examined are those which have slight empirical grounds. Other concepts examined are those which seem to have empirical bases but which are…

Discusses current learning theories, indicating that though many psychologists and ethologists now agree on using a mechanistic approach, some linguists doubt its adequacy. Implications of research on the mollusk "Aplasia" to understand the learning process are included. (JN)

Various examples of communication in species ranging from bumble bees to dolphins are examined in this paper. Focus is directed to indications of the cognitive ability of each species. The signals of cognition include evidence of: adaptability to a new situation; long term memory; and the property of displacement. Most of the sources reviewed…

Reviews research on influences on children's symbolic play. Finds little support for the effects of child-adult symbolic play interactions on child solitary play. Discusses three theoretical perspectives that should support these effects: attachment, ethological, and scaffolding theories. Reconsiders the essence of specific variables affecting…

Response to article by Bornstein and Tamis-LeMonda in this same issue. Delimits the faults of the ethological, scaffolding, and attachment theories in assessing maternal effects on children's symbolic play. Concludes that environmental influences are important to, but are not necessarily the sole cause of, child behavior. (JW)