An experiment was carried out in which participants learned words in several conditions: no learning strategy, a verbal learning strategy, visual one and a verbal-visual one. The table below outlines the results from this experiment? What does this table indicate?
Tests of Within-Subjects Effects
Measure: MEASURE_1
Source
Type III Sum of Squares
df
Mean Square
F
Sig.
learn
Sphericity Assumed
262.700
3
87.567
103.697
.000
Greenhouse-Geisser
262.700
1.103
238.140
103.697
.000
Huynh-Feldt
262.700
1.144
229.701
103.697
.000
Lower-bound
262.700
1.000
262.700
103.697
.000
Error(learn)
Sphericity Assumed
22.800
27
.844
Greenhouse-Geisser
22.800
9.928
2.296
Huynh-Feldt
22.800
10.293
2.215
Lower-bound
22.800
9.000
2.533
A. There is too much sphericity in the model.
B. There are too many errors in the model.
C. The null hypothesis can be rejected.
D. The null hypothesis must be rejected.
Answer: C
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