In four experiments, we explored the capacity for spatial mental imagery in patients with hippocampal lesions, using tasks that minimized the role of learning and memory. On all four tasks, patients with hippocampal lesions performed as well as controls. Nonetheless, in separate tests, the patients were impaired at remembering the materials that…

Verbal overshadowing reflects the impairment in memory performance following verbalization of nonverbal stimuli. However, it is not clear whether the same mechanisms are responsible for verbal overshadowing effects observed with different stimuli and task demands. In the present article, we propose a multiprocess view that reconciles the main…

Recent literature has argued that whereas remembering the past and imagining the future make use of shared cognitive substrates, simulating future events places heavier demands on executive resources. These propositions were explored in 3 experiments comparing the impact of imagery and concurrent task demands on speed and accuracy of past event…

The authors examined an activity-based listening strategy with first- and third-grade children in mixed-grade dyads. On the basis of theories of cognitive development and previous research, the authors predicted the following: (a) children in an activity-based strategy would recall more story events compared with those in a repetition strategy and…

The present study examined the activation of imaginal information on true and false memories. Participants studied a series of concrete objects in pictures or words. The imagery group (n = 96) was instructed to form images and the control group (n = 96) was not instructed to do so. Both groups were then given a standard recognition memory test and…

Tested use of visual imagery for overcoming memory loss in community-living older people with evidence of senile dementia. Patients and caregivers were randomly assigned into one of three training conditions: didactic, problem-solving, or wait list. Recall performance was somewhat improved for subjects in the didactic group. (Author)

Compared verbal and visual encoding using the picture superiority effect. One experiment found an interaction between age and type of material. In other experiments, the picture superiority effect was found in both age groups with no interaction. Performing a semantic-orienting task had no effect on recall. (Author/RC)

This study of 96 high school biology students investigates the effectiveness of visual instruction composed of simple line drawings and printed words as compared to printed-words-only instruction, visual tests, and the interaction between visual or non-visual mode of instruction and mode of testing. The subjects were randomly assigned to be given…

An experiment designed to test the generality of Paivio's two factor theory of meaning to sentence comprehension was carried out, and two scoring procedures were investigated: a verbatim score in which sentence elements had to be recalled exactly as they appeared in the original, and a substance score in which synonyms were accepted. The subjects…

Two studies explored conditions in which preschoolers can understand and apply effective elaboration mnemonics. In the first experiment, 24 preschoolers ranging in age from 3 years, 10 months, to 5 years, 5 months were randomly assigned to interaction, no interaction, and control conditions. The experiment was designed to determine whether…

A program of research was conducted to study transitions from preoperational to concrete operational forms of spatial imagery (area 1), to compare results from spatial imagery studies based on open-ended measures (such as drawings) with results based on reaction time measures (area 2), and to study anticipatory imagery in the contexts of memory…

Two instructional variables, visual illustrations and visual mental imagery, were compared for their influences on learning and cognitive strategies. It was hypothesized, based on dual-code theory, that attempts to combine the two would facilitate learning. In a completely randomized factorial design, treatments consisted of 4 versions of a…

This volume of the 30th annual proceedings of the International Group for the Psychology of Mathematics Education conference presents: plenary panel papers; research forum papers; short oral communication papers; and poster presentation papers from the meeting. Information relating to discussion groups and working sessions is also provided.…