The development of the concept of seriation was studied for 415 children, ranging in age from 3 to 9 years. The subjects were required to learn to identify the larger or smaller object in a two stimulus series, the smallest or middle-sized object in a three stimulus series, and the largest or next to the smallest in a four stimulus series. The end…

This study examined the relationship between witness age, narrative features in testimony, and the perceived credibility of witnesses. Ninety older and young adult witnesses to a staged theft were videotaped as they freely recalled crime events. Later, participant-jurors viewed the videos and assessed the witnesses' credibility. Operational…

Seventy two first, second and third grade boys and girls were administered seriation problems involving different combinations of shape and color variation. Success rates and latency scores were influenced by shape variation, but not by color variation or grade level. (BD)