No Significant Difference
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Transcript of No Significant Difference
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No Significant Difference
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The No Significant Difference Phenomenonby Thomas Russell
Published in 1992, updated 1999 and currently on web
Not a scientific studyHistorical catalog of 200+ (now 500+) media
comparison studies (MCS) which showed no significant difference.
Primary outcome is the preponderance of evidence.
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Richard Clark
Loudest “voice” in the literature on MCSStated position: educational media has no more
effect on educational outcome than a grocery van has on the nutritional value of the groceries.
Allows: Economic savings may justify new media
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Carol Twigg
Wrote introduction to 1992 editionStated position: Supports Russell’s findings; MCS
are unnecessary; all media may be assumed as equivalent
Allows: A number of people may feel new technology/media must be “proved” first
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Thomas Russell
Author of bookStated position: Stop reproving that already
proven! No media will be shown less/more effective than any other.
Allows: Equivalent technologies may be ranked/selected based on other criteria.
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Cumulative MCS by Year
0
50
100
150
200
250
300
350
1927
1932
1937
1942
1947
1952
1957
1962
1967
1972
1977
1982
1987
1992
1997
Self-Paced
Internet
Multimedia
Distance Education
VideoConference
Simulation
Satellite
Text
Computer
Image Only
Color TV
Audio + Image
Telephone
TV
Audio + Film
Film + Text
Film
Audio Only
Correspondence
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Total MCS 1920-2000
1
10
100
1000
Cor
resp
onde
nce
Aud
io O
nly
Film
Film
+ T
ext
Aud
io +
Film TV
Tele
phon
e
Aud
io +
Imag
eC
olor
TV
Imag
e O
nly
Com
pute
r
Text
Sat
ellit
e
Sim
ulat
ion
Vid
eoC
onfe
renc
eD
ista
nce
Edu
catio
n
Mul
timed
iaIn
tern
et
Sel
f-Pac
ed
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Conclusions
• No technology/media is meaningful in education
• eTextbook research is a waste of time.• We are all frauds• We should turn of Centra and close class
because no technology/media is useful.WRONG!!
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FixBoard
Fully Removable
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Reframing Conclusions• No technology/media is meaningful in
education• We should turn of Centra and close class
because no technology/media is useful.Define meaningful; useful is another measure
• eTextbook research is a waste of time.Accept Russell; focus on other features
• We are all fraudsAll I can say is :P
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Other Features
Clark suggested economic savings
Consider educational “affordances”Affordance – An increased or new capability as a result of a
new technique/technology
Consider lesson integrationLesson integration – A lesson plan which is designed to use
a set of techniques/technology as part of the lesson rather than as an enrichment activity.
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Khan Academy
Economic: No investmentAffordances: Replay of lecture, repeated
exercise, suggested lessons, student tracking, improved use of teacher time.
Integration: Use for homework assignments, use for basic lecture, use for lab/practice sessions.
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eTextbook
Economic:Affordances:
Integration:
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Auto-grader
Economic:Affordances:
Integration:
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iBook
Economic:Affordances:
Integration:
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Non-binding Auto-Assessment
Economic:Affordances:
Integration:
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Binding Auto-Assessment
Economic:Affordances:
Integration:
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Multiple Submissions
Economic:Affordances:
Integration:
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REAL Conclusions
One MAY choose to accept the statement that “all media are educationally equivalent”.
Any technology (eTextbook among them) needs to be justified by other means.
eTextbook should be built with an eye to – Reducing cost– Targeting specific affordances– Focus on lesson integration