Categories are fundamental to everyday life and the ability to learn new categories is relevant across the lifespan. Categories are ubiquitous across modalities, supporting complex processes such as object recognition and speech perception. Prior work has proposed that different categories may engage learning systems with unique developmental…

In the two major sections of this paper the influence of John B. Carroll and Robert Lado on the teaching and testing of listening comprehension since 1961 is examined. The first section reviews the literature of that field and outlines four major periods roughly corresponding to the methodological orientation dominating professional thinking at…

Nineteen moderately/severely retarded students (ages 9-22) completed ten 15-minute computer-assisted instruction sessions and seven basic cognitive tasks measuring simple learning, choice reaction time, relearning, probed recall, stimulus discrimination, tachictoscopic threshold, and recognition memory. Stimulus discrimination, probed recall, and…