Introduction.

Theoretical and Empirical Issues in the Study of Discrimination Learning.

Infants’ Mediation Processes During Learning.

The Nature and Processes Involved in Infants’ Learning.

General Discussion: Implications for the Development of Attention and Learning.

References.

Acknowledgments..

Commentary.

Cognitive Processes Explain Learning Across the Life Span: Infants and Toddlers are People Too. (Barry Gholson).

Reply.

On the Development of the Processes Underlying Learning Across the Life Span. (Jeffrey T. Coldren and John Colombo).

Contributors.

Statement of Editorial Policy.