Lane, David M.2018-12-182018-12-181984Kleiss, James Alan. "The effect of specific practice on the capacity demands of detecting a target letter among two types of distractors." (1984) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104760">https://hdl.handle.net/1911/104760</a>.https://hdl.handle.net/1911/104760Although there is considerable evidence that visual stimuli are processed in a parallel and capacity-free manner, recent data suggest that letter perception is a limited capacity process in at least some situations. Research on practice effects in perception has been interpreted as indicating that perceptual tasks that initially demand attentional capacity can be performed in an automatic and capacity-free manner after much consistent practice. The present research investigated the effect of practice on the attentional demands of processing a multi-stimulus letter display. The results showed that practice did not eliminate capacity limitations although there was evidence of a decline in the capacity demands of the feature integration stage of perception early in practice. The fact that capacity limitations generally persisted throughout the experiment suggests that there is at least one other source of limited capacity processing in letter perception and that this source is much less affected by practice.47 ppengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ThesisRICE2397reformatted digitalThesis Psych. 1984 Kleiss