Today the application of the embedded system is more complex. Especially the multimedia function is most popular. But it is still difficult to work smooth on the embedded systems. However, there are some solutions to solve this problem, like DSP and some specific codec chips. But these methods are almost outside of the embedded microprocessor. Here we advance a new architecture, Multimedia Operation Register. We use the bit slice concept to design operation pair which combining bit storage cell and bit computation. Sixty four operation pairs form a MOSU¡]Multimedia Operation Storage Unit¡^. One MOSU could execute all multimedia instructions. We using multiple MOSUs and three register addressing modes to achieve optimal SIMD. The number of MOSUs in Multimedia Operation Register could be determined flexibly by different kinds of operation efficiency requirement. On the other hand we design new instruction set based on the Intel MMX instruction set and the operation feature of H.26x video codec series. According to the simulation in 6th chapter, new instruction set is more efficient than the Intel MMX instruction set, and the Multimedia Operation Register architecture compared with C64 DSP could obtain 105% performance enhancement.

While emerging technologies such as interactive multimedia are increasingly being employed in computerised music instruction, understanding of participant music listening behaviours in interactive multimedia music instruction is currently very limited. With the aim of elucidating music listening behaviour, the central concern of this work is to identify and explain participant interactions with the audio components of interactive multimedia music instruction. The investigation employs a novel documentation procedure, which extends the application of digital audio recording technology, to provide a finely calibrated analysis of the audio activity of a sample of 20 undergraduate music education majors during individual sessions with two commercially-available interactive multimedia music instruction programs. Graphically-based Sound Activity Profiles, which the researcher developed specifically for the current investigation, characterise and summarise participant interactions with audio components, while an analysis of questionnaire responses and follow-up interview transcripts provides supplementary information that further explains participants' music listening behaviours. The results of the investigation show that music listening behaviours during the study sessions were highly variable. While extensive participant interaction with music examples occasionally reflected attentive music listening behaviours, many study sessions were characterised by brief, fragmentary music excerpts and lengthy periods of silence. Participants spent as little as five percent of their session time listening to music and as much as 88 percent of the session time in silence. A substantial number of the study cohort frequently interrupted the music examples they had activated. Participants' perceptions of the extent of their interaction with music examples were frequently inaccurate, as subjects often substantially overestimated the amount of session time they had spent listening to music. The study findings suggest that many interactive multimedia music instruction participants would benefit from interventions that elicit more extensive and prolonged interaction with music examples. Accordingly, recommendations include a call for research to develop and test software designs that incorporate automated monitoring of session audio activity so that dynamic on-screen information about music listening behaviour can be provided to interactive multimedia music instruction participants. Such information may encourage participants to modify inappropriate music listening behaviours.

While emerging technologies such as interactive multimedia are increasingly being employed in computerised music instruction, understanding of participant music listening behaviours in interactive multimedia music instruction is currently very limited. With the aim of elucidating music listening behaviour, the central concern of this work is to identify and explain participant interactions with the audio components of interactive multimedia music instruction. The investigation employs a novel documentation procedure, which extends the application of digital audio recording technology, to provide a finely calibrated analysis of the audio activity of a sample of 20 undergraduate music education majors during individual sessions with two commercially-available interactive multimedia music instruction programs. Graphically-based Sound Activity Profiles, which the researcher developed specifically for the current investigation, characterise and summarise participant interactions with audio components, while an analysis of questionnaire responses and follow-up interview transcripts provides supplementary information that further explains participants' music listening behaviours. The results of the investigation show that music listening behaviours during the study sessions were highly variable. While extensive participant interaction with music examples occasionally reflected attentive music listening behaviours, many study sessions were characterised by brief, fragmentary music excerpts and lengthy periods of silence. Participants spent as little as five percent of their session time listening to music and as much as 88 percent of the session time in silence. A substantial number of the study cohort frequently interrupted the music examples they had activated. Participants' perceptions of the extent of their interaction with music examples were frequently inaccurate, as subjects often substantially overestimated the amount of session time they had spent listening to music. The study findings suggest that many interactive multimedia music instruction participants would benefit from interventions that elicit more extensive and prolonged interaction with music examples. Accordingly, recommendations include a call for research to develop and test software designs that incorporate automated monitoring of session audio activity so that dynamic on-screen information about music listening behaviour can be provided to interactive multimedia music instruction participants. Such information may encourage participants to modify inappropriate music listening behaviours.

Because of increased commuter traffic volume on rural roadways collisions between motor vehicles and farm equipment have increased in frequency and severity over the last several years. This study investigated the effects of a multimedia narrative simulation program that taught hazard recognition and promoted defensive driving on rural roadways shared by farm equipment. A companion animated driving game allowed users to practice reaction/stopping time distances with a simulated automobile on a simulated highway when objects appeared suddenly in the path of the automobile. The program and game were delivered by an objective-oriented client/server computer program that also recorded and stored student pre-test, performance, and posttest data. Prior to the main study a user test and pilot study were conducted. Fifteen instructional systems design graduate students completed the user test to evaluate the study procedures and debug the program. Then, a pilot study sample of 17 rural high school students completed the narrative simulation exercise, the reaction/stopping time game, and the study measures that included a demographic survey, pre- and post measures of predicted reaction/stopping time, recognition of collisions hazard cues, numerical performance scores for the simulation exercise, and tracking logs of each student's performance during the animated raction/stopping time game. The main study sample included 123 students age 16 years and older who attended four rural and suburban county high schools. The schools were randome assigned to the four treatment conditions, one control and three treatment groups. The treatment group students completed either (a) the multimedia narrative simulation only, (b) the animated reaction time/stopping time game only, or (c) both the multimedia simulation and the reaction time/stopping time game. As hypothezised, students in the groups that completed the hazard recognition and defensive driving skills performed significantly better on posttests of those skills than students in groups that did not complete the simulation. Compared to students that did not complete the reaction/stopping time game, significantly more students that did complete the game became aware that they could not stop the simulated automobile before hitting an object in its pathway. Yet there was nodifference across the four groups in students' estimates of reaction/stopping time distances. Limitations of the study are noted and discussed. Recommendations for future studies are proposed.

The study assessed the knowledge structure of Grade 11 physics students and their instructors using Pathfinder networks. Instructors’ structural knowledge was averaged to create a referent pathfinder network. Each student’s pathfinder network was compared with the referent pathfinder network in order to identify misconceptions. These misconceptions served as the basis for remedial instruction. The study was conducted in six sections of Grade 11. Three different types of remedial instruction based on three different chapters from the Grade 11 physics textbook were given to the students at three separate stages. In the first section, students were shown their own and referent pathfinder networks as an intervention during the first stage. The students were asked to reflect on the similarities and differences between them. The researcher gave written concept-oriented exercises based on the differences at the second stage, and multimedia concept-oriented instruction based on the differences was given to the students at the third stage. The order of instruction was counterbalanced in all the six sections. After each stage, students’ pathfinder networks were reassessed and the similarities between students’ and the referent pathfinder networks were calculated to measure the effect of a particular intervention. The study tried to determine which type of remedial instruction given to students best improved the knowledge structure of the students in the domain of physics. Results revealed that the similarity indices around the treatment concepts in the pathfinder networks of the students increased the most from pre- to post-intervention phase because of their reflections, followed by multimedia concept-oriented instruction and written concept-oriented exercises. Most likely, the major reason for this change was the interventions around the treatment concepts by the researcher at three different stages which stimulated and probably changed some of students’ misconceptions. To address the issue of validity, the similarity indices of control concepts in the students’ pathfinder networks were also checked for improvement. The result shows that there is no appreciable improvement in control concepts as there was no intervention around those concepts. Findings support the use of structural assessment of knowledge with pathfinder scaling technique to check the effectiveness of a classroom instruction.

The study assessed the knowledge structure of Grade 11 physics students and their instructors using Pathfinder networks. Instructors’ structural knowledge was averaged to create a referent pathfinder network. Each student’s pathfinder network was compared with the referent pathfinder network in order to identify misconceptions. These misconceptions served as the basis for remedial instruction. The study was conducted in six sections of Grade 11. Three different types of remedial instruction based on three different chapters from the Grade 11 physics textbook were given to the students at three separate stages. In the first section, students were shown their own and referent pathfinder networks as an intervention during the first stage. The students were asked to reflect on the similarities and differences between them. The researcher gave written concept-oriented exercises based on the differences at the second stage, and multimedia concept-oriented instruction based on the differences was given to the students at the third stage. The order of instruction was counterbalanced in all the six sections. After each stage, students’ pathfinder networks were reassessed and the similarities between students’ and the referent pathfinder networks were calculated to measure the effect of a particular intervention. The study tried to determine which type of remedial instruction given to students best improved the knowledge structure of the students in the domain of physics. Results revealed that the similarity indices around the treatment concepts in the pathfinder networks of the students increased the most from pre- to post-intervention phase because of their reflections, followed by multimedia concept-oriented instruction and written concept-oriented exercises. Most likely, the major reason for this change was the interventions around the treatment concepts by the researcher at three different stages which stimulated and probably changed some of students’ misconceptions. To address the issue of validity, the similarity indices of control concepts in the students’ pathfinder networks were also checked for improvement. The result shows that there is no appreciable improvement in control concepts as there was no intervention around those concepts. Findings support the use of structural assessment of knowledge with pathfinder scaling technique to check the effectiveness of a classroom instruction.

Research in the field of multimedia has yielded principles for the design of effective multimedia instructional messages including Mayer's principles regarding voice. According to the voice principle, students learn more deeply when the narration in a multimedia lesson is spoken by a native voice rather than a non-native voice. The generalizability of the voice principle has been demonstrated when applied to multimedia users who are native speakers of the language used in narration. However, three out of four English users are non-native speakers of English, and the vast majority of verbal exchanges in English do not involve any native speakers of the language at all. By focusing on non-native users, the results of this study should clarify the applicability of the voice principle to a broader target audience. The study investigated whether the accent of the narrator in a multimedia tutorial affected participants' learning and attitudes toward the narrator. The independent variable of the study was narrator's accent with two levels: native accent and non-native shared accent. The dependent variables of the study were participants' learning and their attitudes toward the narrators. Sixty-five Chinese participants at a Midwestern university in the United States were randomly assigned to one of two groups in this experimental design. Data to test the dependent variables were collected through a learning achievement test and an attitude survey. Data analyses revealed that there was no significant difference in overall learning and recall level learning between the two accent groups. However, the group who heard the narration spoken with the native American English accent had significantly more positive attitudes toward their respective narrator than the group who heard the narration spoken with a non-native shared Chinese accent. The study qualifies the voice principle by establishing the limits of its generalizability to non-native English speakers. The study suggests to instructional designers that the use of a non-native shared accent should not affect students' learning negatively although it may affect their attitudes toward the speakers. In addition, the study helps assure non-native instructors that they can record their own voices to use in multimedia instruction as their non-native students will learn as effectively as with a native English accent.

The study assessed the knowledge structure of Grade 11 physics students and their instructors using Pathfinder networks. Instructors’ structural knowledge was averaged to create a referent pathfinder network. Each student’s pathfinder network was compared with the referent pathfinder network in order to identify misconceptions. These misconceptions served as the basis for remedial instruction. The study was conducted in six sections of Grade 11. Three different types of remedial instruction based on three different chapters from the Grade 11 physics textbook were given to the students at three separate stages. In the first section, students were shown their own and referent pathfinder networks as an intervention during the first stage. The students were asked to reflect on the similarities and differences between them. The researcher gave written concept-oriented exercises based on the differences at the second stage, and multimedia concept-oriented instruction based on the differences was given to the students at the third stage. The order of instruction was counterbalanced in all the six sections. After each stage, students’ pathfinder networks were reassessed and the similarities between students’ and the referent pathfinder networks were calculated to measure the effect of a particular intervention. The study tried to determine which type of remedial instruction given to students best improved the knowledge structure of the students in the domain of physics. Results revealed that the similarity indices around the treatment concepts in the pathfinder networks of the students increased the most from pre- to post-intervention phase because of their reflections, followed by multimedia concept-oriented instruction and written concept-oriented exercises. Most likely, the major reason for this change was the interventions around the treatment concepts by the researcher at three different stages which stimulated and probably changed some of students’ misconceptions. To address the issue of validity, the similarity indices of control concepts in the students’ pathfinder networks were also checked for improvement. The result shows that there is no appreciable improvement in control concepts as there was no intervention around those concepts. Findings support the use of structural assessment of knowledge with pathfinder scaling technique to check the effectiveness of a classroom instruction.

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<p>The best category to describe this thesis is:</p> <p>Pedagogy and Applieded Cognitive Psychology</p> / <p>This thesis discusses two experiments that investigated the effective use of text and images in multimedia instruction. Experiment 1 examined efficient methods of multimedia design based on theoretical principles concerning how words and images influence information processing. Computer-based lectures were presented to university students containing visual elements including redundant text, non-redundant text, images, and the speaker’s image. Lectures with redundant text and audio produced poorer comprehension in comparison to lectures with non-redundant text and images. Non-redundant text and images enhanced learning, and accurate assessments of understanding. Experiment 2 implemented a more controlled design using four computer-based lectures with only two variable manipulations: text (redundant vs. non-redundant) and image (present vs. absent). The speaker’s image was removed from the design in Experiment 2 due to its lack of influence on learning in Experiment 1. Redundant text lectures produced the poorest comprehension, but only when images were absent. Contrary to common belief, these experiments demonstrate that redundant text is not an effective visual aid. Additionally, this thesis discusses future research investigating cognitive explanations for text and image effects in multimedia learning.</p> / Master of Science (MSc)