When too much visual stimuli is present, the phenomenon of clutter is known to degrade an individual's perception across a variety of domains, ranging from completing search tasks incorrectly, to decreasing reading speed when letters are too close together. However, research is lacking as to whether the negative effects of clutter impact learning…

The purpose of this experiment was to examine lag function developmental parameters and to test a related developmental hypothesis and the predictions it generated. Fourth and eighth graders and adults were shown a series of words, one at a time, with some words presented twice. Between the two presentations of each repeated word there was one of…

A theoretical situation-person-interactions model of learning and performance is presented, and applications of the model through the Instrumental Language Functions (ILF) approach with preschool normal and older variously handicapped children and adults are described. The model is graphically depicted and discussed according to such aspects as…

The research reported here examines the influence of knowledge of two languages on the organization of semantic information in long-term memory. Eight English-French bilingual adults were presented pairs of letter strings and had to decide whether both strings were words. Half of the trials contained English-French word pairs which required a…

The nature and magnitude of practice effects on the Wechsler Memory Scale-Revised (D. Wechsler, 1987) were studied with 64 adult college students. The clinically meaningful increase observed across the four test sessions highlights the importance of controlling for practice effects on repeated administration of neuropsychological measures. (SLD)

A framework is proposed in which on-line activities occurring during comprehension are explicitly tied to the memory representation of a story. The framework, referred to as the "landscape" framework, is used to implement a process model that assumes that readers attempt to explain story events in terms of their causal antecedents. An…

The study was designed to evaluate a hypothesis derived from recent trends in cognitive theory. The hypothesis concerned whether spatial environment information stored in memory is primarily analog or propositional. A related question concerned whether differences between analog and propositional processes underlie individual differences in the…

Recent investigations of the cognitive components of human-environmental interactions owe much to the work of city planner Kevin Lynch, who hypothesized cognitive mapping as a two-way interactive process between individuals and their environment. Lynch identified five elements which individuals used in the construction of cognitive maps,…

Memory studies involving older adults have typically been conducted in laboratory settings and have usually employed experimental tasks. Most results support cognitive decline. Most naturalistic experimental studies relate to spatial memory and test younger respondents. When older respondents are tested, the old sometimes outperform and sometimes…

Research has suggested that memory performance may be related to the extent of stimulus processing during acquisition. To examine processing efficiency and processing deficiency differences between younger and older adults, four studies were conducted. In the first study, young and old adults rated word lists, manipulated for generation specific…

This study is concerned with how much children remember about a salient event in their life, how much is forgotten over time, and whether age at the time of the event affects how much is remembered. Thirty-six children (ages 4, 8, and 12) and 26 college students, all of whom had a sibling born when they were age 4, were either interviewed or given…

Semantic priming is the process by which a subject performing a lexical decision task is prepared for a target word through the presentation of a semantically related word. Repetition of a given word at specific intervals is one form of priming that has been shown to reduce subject reaction time in word recognition tasks. A study was conducted to…

The availability and application of particular memory strategies by deaf children and adults was examined. In the first study, 20 younger (mean age, 6 years, 3 months) and 20 older (8 years, 8 months) children's use of rehearsal strategies was examined with a serial probe task. All four types of stimuli (animals, nonsense shapes, hands, print)…

In this study, developmental changes in duration of the icon (visual sensory store) were investigated with three converging tachistoscopic tasks. (1) Stimulus interuption detection (SID), a variation of the two-flash threshold method, was performed by 29 first- and 32 fifth-graders, and 32 undergraduates. Icon duration was estimated by stimulus…

Two studies compared the effects of spontaneous and controlled imagery on reality monitoring decisions. Reality monitoring refers to the decision processes involved in discriminating perceptual memories from imaginal ones. In Experiment 1, 6-year-olds and adults were shown pictures and words and they responded to one of two questions: (1)…