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This study sought to improve students' comprehension of scientific graphs by adapting scaffolding techniques used to aid text comprehension. In 3 experiments involving 121 female and 88 male college students, some students were shown cognitive aids prior to viewing 4 geography graphs whereas others were not; all students were then asked to write a summary of the main information in the graphs. Students who received signaling or structural graphic organizers, which are designed to facilitate the cognitive process of organizing, generated more relational statements (e.g., "the deeper the water, the greater the sediment concentration"; d = 0.60 and d = ...

In 4 experiments, students received a lesson consisting of computer-based animation and narration or a lesson consisting of paper-based static diagrams and text. The lessons used the same words and graphics in the paper-based and computer-based versions to explain the process of lightning formation (Experiment 1), how a toilet tank works (Experiment 2), how ocean waves work (Experiment 3), and how a car’s braking system works (Experiment 4). On subsequent retention and transfer tests, the paper group performed significantly better than the computer group on 4 of 8 comparisons, and there was no significant difference on the rest. These results support the static media ...

The aim of this article is to investigate with high and low knowledge subjects in the scientific domain of the neuron, the way information should be presented and illustrated to promote the integration of new information. This fundamental process for learning was examined in two experiments using a primed recognition task. In the first study, the nature of domain-specific information depicted (states or events) was manipulated while in the second, the temporal position of illustrations (before or after textual information) was also considered. The main result showed that when presented before the text, illustrations allow easier retrieval from memory (a) ...

The aim of this article is to investigate with high and low knowledge subjects in the scientific domain of the neuron, the way information should be presented and illustrated to promote the integration of new information. This fundamental process for learning was examined in two experiments using a primed recognition task. In the first study, the nature of domain-specific information depicted (states or events) was manipulated while in the second, the temporal position of illustrations (before or after textual information) was also considered. The main result showed that when presented before the text, illustrations allow easier retrieval from memory (a) ...

Animating the graphics in electronic documents may increase readers’ willingness to study them but may impair or distort the processes of gist comprehension. Experiment 1 confirmed that, compared with static diagrams, animation increased readers willingness to study a range of graphic genres (maps, time-lines, drawings of unfamiliar objects). Total reading time was also increased but readers’ differential access of static and animated graphics confounded the interpretation of immediate and delayed retention tests. Experiment 2 contrasted the effects of accessing the graphics before or during reading. Scores on a quiz immediately after reading were significantly higher when the graphics were seen ...

Animating the graphics in electronic documents may increase readers’ willingness to study them but may impair or distort the processes of gist comprehension. Experiment 1 confirmed that, compared with static diagrams, animation increased readers willingness to study a range of graphic genres (maps, time-lines, drawings of unfamiliar objects). Total reading time was also increased but readers’ differential access of static and animated graphics confounded the interpretation of immediate and delayed retention tests. Experiment 2 contrasted the effects of accessing the graphics before or during reading. Scores on a quiz immediately after reading were significantly higher when the graphics were seen ...

Cognitive load theory suggests that effective instructional material facilitates learning by directing cognitive resources toward activities that are relevant to learning rather than toward preliminaries to learning. One example of ineffective instruction occurs if learners unnecessarily are required to mentally integrate disparate sources of mutually referring information such as separate text and diagrams. Such split-source information may generate a heavy cognitive load, because material must be mentally integrated before learning can commence. This article reports findings from six experiments testing the consequences of split-source and integrated information using electrical engineering and biology instructional materials. Experiment 1 was designed to compare ...

Hierarchical graphs represent relationships between objects (like computer file systems, family trees etc.). Graph nodes represent the objects and interconnecting lines represent the relationships. In two experiments we investigated what concepts are necessary for understanding hierarchical graphs, what misconceptions evolve when some of the concepts are missing and how misconceptions can be prevented through instruction. Participants were taught different amounts of prior knowledge and then had to respond to a multiple-choice questionnaire with interpretive questions about graphs. In Experiment 1, 72 university students received different amounts of instruction about the concepts necessary to interpret hierarchical graphs. Through detailed analysis of ...

Hierarchical graphs represent relationships between objects (like computer file systems, family trees etc.). Graph nodes represent the objects and interconnecting lines represent the relationships. In two experiments we investigated what concepts are necessary for understanding hierarchical graphs, what misconceptions evolve when some of the concepts are missing and how misconceptions can be prevented through instruction. Participants were taught different amounts of prior knowledge and then had to respond to a multiple-choice questionnaire with interpretive questions about graphs. In Experiment 1, 72 university students received different amounts of instruction about the concepts necessary to interpret hierarchical graphs. Through detailed analysis of ...

Mobile phone usage is now at saturation point in most Western countries. The current research investigated the usability of services provided by a mobile phone network, specifically whether two different forms (text, graphic) of an advance organizer (AO) assisted novice users in applying information supplied in a manual. It was hypothesized that a graphic AO would facilitate the development of coherent mental models of the network to enhance task performance, and that lower ability groups in particular would benefit from AOs. Contrary to prediction, the text AO group outperformed both the graphic AO and control groups. Lower ability groups also ...