SPSS Outputs – Total
Group Statistics Condition Total
N
Mean
Std. Deviation
Std. Error Mean
Impossible
13
5.0000
1.15470
.32026
Possible
13
8.1538
1.34450
.37290
Independent Samples Test Levene's Test for Equality of Variances
t-test for Equality of Means 95% Confidence Interval of the Difference Std. Error
F Total
Equal variances assumed Equal variances not assumed
Sig. .531
t .473
df
Sig. (2-tailed)
Mean Difference
Difference
Lower
Upper
-6.416
24
.000
-3.15385
.49155
-4.16835
-2.13935
-6.416
23.465
.000
-3.15385
.49155
-4.16957
-2.13812
SPSS Outputs – First
Group Statistics Condition First
N
Mean
Std. Deviation
Std. Error Mean
Impossible
13
2.2308
.72501
.20108
Possible
13
3.4615
1.26592
.35110
Independent Samples Test Levene's Test for Equality of Variances
t-test for Equality of Means 95% Confidence Interval of the Difference Std. Error
F First
Equal variances assumed Equal variances not assumed
Sig. 2.558
t .123
df
Sig. (2-tailed)
Mean Difference
Difference
Lower
Upper
-3.042
24
.006
-1.23077
.40461
-2.06584
-.39570
-3.042
19.107
.007
-1.23077
.40461
-2.07730
-.38424
SPSS Outputs – Second
Group Statistics Condition Second
N
Mean
Std. Deviation
Std. Error Mean
Impossible
13
1.7692
1.01274
.28088
Possible
13
2.6154
1.19293
.33086
Independent Samples Test Levene's Test for Equality of Variances
t-test for Equality of Means 95% Confidence Interval of the Difference Sig. (2-
F
Sig.
t
df
tailed)
Std. Error Mean Difference
Difference
Lower
Upper
S Equal e varianc c es
.607
.443
-1.950
24
.063
-.84615
.43401
-1.74190
.04959
-1.950
23.384
.063
-.84615
.43401
-1.74315
.05084
o assume nd d Equal varianc es not assume d
SPSS Outputs – Third
Group Statistics Condition Third
N
Mean
Std. Deviation
Std. Error Mean
Impossible
13
1.0000
.40825
.11323
Possible
13
2.0769
.75955
.21066
Independent Samples Test Levene's Test for Equality of Variances
t-test for Equality of Means 95% Confidence Interval of the Difference Std. Error
F Third
Equal variances assumed Equal variances not assumed
Sig. 6.054
t .021
df
Sig. (2-tailed)
Mean Difference
Difference
Lower
Upper
-4.503
24
.000
-1.07692
.23916
-1.57053
-.58331
-4.503
18.399
.000
-1.07692
.23916
-1.57861
-.57524