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Alternativ till videofilmer

• Björn Hedin• Royal Institute of

Technology• Dept. of Media

Technology• Stockholm, Sweden• bjornh@kth.se

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Nackdelar med videoinspelningar

• Tar lång tid att göra bra• Kräver ganska mycket utrustning och

kompetens• Kan vara svårt att läsa om läraren skriver

på tavla• Stora filer

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Enhanced podcasts

• Ljud + stillbilder. Lätta att producera från en PowerPoint presentation.

• Kapitel-> lätt att navigera i en presentation.• Mycket mindre filer.• Lätt att läsa text, även på väldigt små

skärmar.• Går att se på iPods/iPhones.• Går lätt att konvertera till 3gpp video som

fungerar på mobiltelefoner (begränsad kapitelfunktionalitet).

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Exempel Enhanced Podcasts

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Enhanced podcasts på iPhone/iPod

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• Exempel nedan: 320x240 px. Vanlig skärmstorlek idag.

• Ganska lätta att läsa om man valt tillräckligt stor font (minst 28 pt)

• Dock inte enkel navigering.

3gp på mobiler

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Slidecasts

• Enhanced podcasts kräver vissa (gratis)-program, som man kanske inte vill installera (iTunes/QuickTime)

• Slidecasts är motsvarande fast webb-baserat. http://www.slideshare.net

• Dock: Kräver en del extraarbete att producera.

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Exempel på Slidecasts

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Studie gjord HT 2006

• Samma kurs gavs tre gånger.– A) 44 civilingenjörsstudenter. Endast

traditionell undervisning. – B) 24 högskoleingenjörsstudents. Samtliga

föreläsningar tillgängliga som enhanced podcasts vid kursstart. Motsvarande föreläsningar gavs även i klassrum

– C) 51 civilingenjörsstudenter. Endast tillgång till enhanced podcasts. Inga föreläsningar.

• Kurs B och C utvärderades med enkäter. 88% svarade.

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Usefulness

• Q: “I believe the podcasts were very useful.”

5

0

2

7

26

23

0 5 10 15 20 25 30

Unanswered

Strongly Disagree

Disagree

Neither Agrees norDisagrees

Agrees

Strongly Agrees

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Review lecture content

• Q: “To be able to go back and review parts of the lectures you didn’t understand is very important.”

5

0

0

0

17

41

0 10 20 30 40 50

Unanswered

Strongly Disagree

Disagree

Neither Agrees norDisagrees

Agrees

Strongly Agrees

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Comparision to regular lectures

• Q: “As a whole I prefer enhanced podcasts over regular lectures.”

5

6

11

26

8

7

0 5 10 15 20 25 30

Unanswered

Strongly Disagree

Disagree

Neither Agrees norDisagrees

Agrees

Strongly Agrees

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Interaction

• Q: “Not being able to immediately ask questions to the lecturer is a very big disadvantage with podcasts.”

5

1

13

15

24

5

0 5 10 15 20 25 30

Unanswered

Strongly Disagree

Disagree

Neither Agreesnor Disagrees

Agrees

Strongly Agrees

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Selected results - time- and place shifting• Q: “The possibility to access a lecture podcast without

having to be at a specific place at a specifict time (like a lecture) is very important.”

6

0

2

8

21

26

0 5 10 15 20 25 30

Unanswered

Strongly Disagree

Disagree

Neither Agrees norDisagrees

Agrees

Strongly Agrees

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Navigation

• Q: “To be able to go back and forth and ‘jump’ between chapters in a podcast is very important.”

5

0

1

0

27

30

0 5 10 15 20 25 30 35

Unanswered

Strongly Disagree

Disagree

Neither Agrees norDisagrees

Agrees

Strongly Agrees

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Mobility

• Q: “I would be very interested in watching lecture podcasts on an iPod/mobile phone on 'waste time', like when waiting for a commuter train, traveling on a train or bus etc (given that I owned suitable equipment)”

3

2

9

12

17

20

0 5 10 15 20 25

Unanswered

Strongly Disagree

Disagree

Neither Agrees norDisagrees

Agrees

Strongly Agrees

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Mobility - no navigation• Q: “I would be very interested in being able to watch

podcasts in my mobile phone, even if the possibility to jump between different images didn't exist, in effect making the entire lecture an ordinary video file.”

3

5

11

12

27

4

0 5 10 15 20 25 30

Unanswered

Strongly Disagree

Disagree

Neither Agreesnor Disagrees

Agrees

Strongly Agrees

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Include video of lecturer?

• Q: “The podcasts would have been much better if they also had included a video showing the lecturer when he (I) talked.”

5

14

21

16

6

0

0 5 10 15 20 25

Unanswered

Strongly Disagree

Disagree

Neither Agreesnor Disagrees

Agrees

Strongly Agrees

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Selected results - how podcasts were used• Only asked to the 16 students who

used podcasts in the “blended” course.

Always Often Sometimes NeverI used podcasts as lecture replacements. 6 2 4 4I used the podcasts to prepare for the regular lectures. 1 0 5 10I used the podcasts to go back and repeat lecture content. 4 2 6 4

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Course results

• Course using only regular lectures - 27 of 44 completed course on time.

• Course using both podcasts and lectures - 23 of 24 completed course on time.

• Course using only podcasts - 49 of 51 completed course on time + award for ”exceptionally good evaluation results”.