A Study of Blocking and Overshadowing in Filial Imprinting

The occurrence of blocking and overshadowing in filial imprinting was investigated in junglefowl chicks (Gallus gallus spadiceus). When subjects were exposed to a novel object in the presence of a familiar one, imprinting on the novel object was impaired in one of two experimental groups (Experiment 1). When subjects were exposed to two objects from the beginning, imprinting on each object was impaired (Experiment 2). These results suggest that phenomena resembling blocking and overshadowing in conditioning may occur in imprinting. The fact that overshadowing was much more prevalent and convincing than blocking is discussed by referring to processes involved in the formation of internal representations. It is suggested that processes connecting these representations to the executive system of filial behaviour may follow the rules of associative learning.     

The Effect of Fiction on Religious Studies Display Shelves in an Academic Library

Abstract

The religious studies librarians at Brigham Young University (BYU) began a book display research project to examine the circulation rates of religious studies titles placed on display and to specifically evaluate the impact of religious fiction on that display in an academic library. Student employees were tasked with curating the displays over several years and maintaining a spreadsheet with the titles displayed and resulting checkout rates. Religious fiction (from The Church of Jesus Christ of Latter-day Saint tradition) circulated over 80% the first three years, higher than the religious nonfiction on display and the same genre in the stacks. In the final year of study when almost no fiction was displayed and a higher quantity of items were placed on the shelves, the display circulation rates fell sharply. All books on the display circulated better when there was a portion of both nonfiction and fiction and when the shelves held fewer items. The data clearly showed that religious fiction is an important genre to display in an academic library.