Background: Understanding the different factors that determine vocabulary development in young children is essential for the diagnosis and rehabilitation of language disorders in children. Language development is closely related to other cognitive processes such as auditory verbal learning and memory. This research focuses on the development of a…

The interference effect of subsequent learning on the retention of material already learned is investigated employing difficult prose passages and a recall test. (PR)

Subjects learned one, two, or three verbal lists simultaneously. Recall of the common list after 24 hours increased directly as the number of lists learned simultaneously increased. Assuming that simultaneous learning reduced interference, the interference was from extraexperimental sources of a proactive nature. (Author/CP)

The effects of semantic (S), orthographic (O), and unrelated (U) verbal stimuli on word retrieval were examined. S stimuli inhibited locating items within categories, whereas U stimuli inhibited locating the appropriate category. The discrepancy between the present outcome and the previous finding of S prime retrieval facilitation is discussed.…

The fan effect (the difficulty in retrieving any one fact after learning many about a concept) occurs only when the facts with repeated concepts are stored as independent episodes. It tells us nothing about the code formed by a pattern of interconnected concepts. (Author/CP)