Benefits Of Audio-Visual Aids Lectures

Benefits Of Audio-Visual Aids LecturesStudents perception on role of audio-visual aids workd in didactical lecturesAbstractBackground objectives Medical instructors have conventionally been utilize different dogma methods to educate health check students. Nowadays audiovisual aids such as power point slides, aliveness videos atomic number 18 being used. The optimum use of audiovisual aids is essential for deriving their benefits. This determine was d adept to agnize the students preferences regarding the various audiovisual aids, with an aim to improve their use in didactic lectures for better understanding of concepts in checkup science.Methods Cross sectional expressional study was under look atn in 113 undergraduate health check students . A secure of questionnaire was distributed and students were directed to choose the to the highest degree appropriate option as per the Likert collection plate. The responses were analyzed use SPSS 17.0.Results Out of 113 stud ents,45.1% favorite(a) use of crew of audiovisual aids during a didactic lecture.27.4% favored animation videos,15.9% best-loved PowerPoint slides 11.5% preferred use of blackboard.Conclusion Our study demonstrates that use of combination of audio-visual aids is the most preferred mode of learn by the students. For better understanding of a subject and improvement of students performance, a teacher should match the lectures with preferred audiovisual aids and use them prudently. The subjects wanted animations to be incorporated frequently into medical education.Key Words alivenesss, Audiovisual aids(AV),Blackboard, didactic lectures, Medical students, Powerpoint slidesIntroduction Today we are living in the era of Information and communication technology. The power of technology has captured the minds of new generation and this influence could be seen in the field of medical education too. The technology for teaching students in this competitive scenario is the use of Audio-Vi sual aids in the form of power point presentments, animation videos, movies etc or give the gate be the combination of both1.Lectures are the most handed-down, old fashioned and didactic method of teaching which are call upt for one way deliverance of tuition and are especially useful when a large number of learners must be taught at one time. Well educated lecture remains one of the most effective ways to integrate and organize information from multiple sources on involved topics2.Lectures are often supported by audio-visual aids by emphasizing key points on the black board, the projection of written or printed matter on transparencies via an budget items projector(OHP) or increasingly nowadays via a computer based system, notably Microsoft power point(PP) animation videos3.The traditional chalk-talk methodology provides strong student-teacher interaction, but its effectiveness declines as the number of students in the class adds. Furthermore, maintenance of correction and drawing attention gets hampered4.OHPs lack the ability to display moving images, have poor visibility and opthalmic focus. Microsoft PP slides, accompanied with multimedia system projectors, have remarkably revolutionized teaching. Texts as well as audiovisual clips can be easily played on PP slides. Animations refer to 3D video clips that can be played on a multimedia projector (MP). They provide a visual simulation that is peculiar(a)ly handy in sustaining gratify and understanding complex medical concepts5.Students favour teaching methods employing audiovisual aids over traditional lectures exploitation blackboard 3.However, the optimum use of audiovisual aids is essential for deriving their benefits6 . There is no definitive study stating the superiority of one method over the other. Garg A et al. have observed that students want the teachers to hold audiovisual aids during the lectures, but it is not certain whether it improves their understanding or performance in th e examinations7. Baxi SN et al. have observed that in that respect was marked improvement in examination results when PPT replaced the use of OHP 8.So there is a mixture of views based on the recent studies and it is not clear whether the use of a particular lecture delivery method is superior to others. Therefore, this study was undertaken to get the feedback from the medical students regarding their preferences in using newer modalities of teaching methods like animation videos, PowerPoint slides, and pre-recorded lectures along with blackboard teaching with available resources and progressively improve lecture delivery for their better understanding.Material methods The cross-sectional, observational study was conducted with prior permission from the authorities and approval from ethical committee. A self administered questionnaire based on previous study4,6,16 was distributed to 130 students of 2nd 3rd year MBBS aged 18-22 age selected by random convenient sampling after obt aining their informed consent.The questionnaire was asked to complete anonymously.Participation was voluntary and dependent on subjects willingnes.The participants were asked not to reveal their names,registration number or any personal information so they can coiffe freely without any influence. Responses were taken from the students present in the class on the day of survey. Those who were absent or refused to participate were excluded from the study.113 students out of 130 who returned the filled questionnaire became the participants in the current study.The questionnaire consists of twenty questions designed in devil parts, first part composed of information regarding schooling, HSC board HSC percentage of the participants. Second part contained questions related to the preferences and opinions for use of AV aids in lecture delivery, in which twelve attributes were measured, based on Likerts scale of scoring as strongly agree/Agree/ No opinion/ Disagree/ strongly disagree. Th e rafts allotted in the aforementioned sequence are 5/4/3/2/1.The participants were promote to furnish their independent and unbiased opinion without revealing their identity in the questionnaire.The sum of the all students grading on each attribute was taken for calculating the final weighted score. The response was analyzed using SPSS 17.0 for data entry and statistical significance was found by using Friedman ANOVA test.Results Association among attributes and preference of AV-aids is depicted in (TABLE- 1).To analyze the best method of audio visual aid in use for independent attributes, ranking scale was adopted allotting the sequence in ascending order. It is evident that mean ranking for blackboard ,PPT prerecorded lectures were lower than that of animation videos for most of the attributes. On application of Friedman test a significant association was found (p Table 1 Association between attributes and preference of AV-aidsAttributesBlackboardPP slidesAnimation videosPrer ecorded lecturesCombinationStat. Sig(Friedmans test) wetSDMedianMeanSDMedianMeanSDMedianMeanSDMedianMeanSDMedianLectures were well organized2.99.9664.003.23.7984.003.93.6595.001.731.0363.003.12.8914.00PContents were well informative2.87.9924.003.38.7934.003.74.5664.002.061.0363.002.96.9084.00PLectures clear understandable3.43.8624.003.11.8334.003.64.6514.001.901.0593.002.94.9324.00PClarity was good2.83.9374.003.51.9584.003.41.8794.002.231.0923.003.03.9364.00PWell audible3.20.7444.003.13.9084.003.31.7894.002.351.0734.003.01.9264.00P excite interest2.911.0154.003.20.9834.003.63.9665.002.221.1433.003.041.0694.00PAdvanced understanding of topics3.121.0454.003.13.9664.003.44.9624.002.321.1083.002.98.6714.00PDelivery was arouse2.86.9554.003.06.9584.003.52.8524.002.471.1123.003.08.6424.00PAble to take notes/diagrams3.74.9674.003.361.1364.002.501.1233.002.281.1453.003.121.1264.00PEffective in clearing concept remembrance3.25.504.003.00.9634.003.46.9734.002.361.1573.002.94.9424.00PConcentr ation/ attention pas de deux maintained3.401.1404.003.071.1344.003.28.9464.002.321.1753.002.93.9494.00PExplanation/ summarization3.21.9734.003.251.0624.003.37.8694.002.271.1263.002.89.9644.00P Table 2 favourite(a) aidPreferred aid followAnimationsblackboardCombinationPpt slidesGenderFemaleCount147351167% within gender20.9%10.4%52.2%16.4%100.0%% within Preferred aid45.2%53.8%68.6%61.1%59.3%MaleCount17616746% within gender37.0%13.0%34.8%15.2%100.0%% within Preferred aid54.8%46.2%31.4%38.9%40.7%TotalCount31135118113%27.4%11.5%45.1%15.9%100.0%Discussion The current study was conducted to get feedback from the medical students regarding their opinion on audiovisual aids used during didactic lectures using a Questionnaire. It is an obvious observation that gradually the use of electronic media has become more common in medical colleges over conservative teaching methods that utilized blackboards9. For centuries, a blackboard remained the mediator for displaying information in a persiste nt manner, and can give the audience a consistent view of far more information than can be held in short- term memory. Anderson R noted that blackboards encourage note-taking and student-teacher interaction10 which was also found in our study. Seth V et al. noted that by using blackboard taking down the simply-drawn diagrams is easy, the teacher makes natural pauses and power breaks do not interfere with the lecture4.Its limitation is that information-rich contents like complex tables, graphs and vivid images cannot be displayed and the organization of the presentation is poorer as compared to electronic slides5.He also noted that the majority of medical students preferred PPT presentations, while dental students preferred chalkboard. Baxi SN et al.8 observed that an equal number of students preferred blackboard-based or multimedia-based lectures and insisted to consider the need of using multimedia modalities to present lectures to students11.In our study it was revealed that the s tudents preferred animation videos over Powerpoint presentations or blackboard. Majority of the students opined for the use of combination of audiovisual aids in didactic lectures for better understanding of concepts in medical science which correlates with the study done by Kaushik Bhowmick et al12.The training program in UG teaching uses a judicious mixture of didactic lectures with audiovisual aids and problem based learning methods, clinical teaching and practical experiments 6.Optimum use of audiovisual aid is essential for deriving their benefits6.Audio visual aids can be effectively used to intend the photographs and the animated pictures related to the topics13.Animations, with their unique three-dimensional presentation, have been accredited with simultaneously being able to increase interest and motivation, to draw attention, to illustrate procedures and to explain how things work14 .Conclusion Our study demonstrated that lecture delivered by using a combination of audio visual aids was most appreciated by the students. To understand complex concepts and to retain facts, the participants desired animations to be incorporated frequently into medical education as they are interesting it breaks the monotony of lecture.It motivates students to attend lectures as they are very curious to see or hear what the teacher is going to show them in the upcoming class, by seeing animated effects, colorful presentation and interview recording they are able to concentrate more1.ReferencesArora A. Impact of Audiovisual aids on students at university level. Altius Shodh journal of Management commerce.2013ISSN 2348-8891.Richardson D. Dont dump the didactic lecture fix it. Adv Physiol Educ. 2008 32(1) 23-24.Bennal A, Itagi V, Taklikar RH.Role of Audiovisual aids in physiology lecture. National Journal of Physiology, Pharmacy Pharmacology.20144(2)109-111.Seth V,Upadhyaya P,Ahmad M,Moghe V.PowerPoint or chalk and talk perceptions of medical students versus dental stu dents in a medical college in India. 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