Table 3
Statistical analysis for Items 2i and 2k in test on negative numbers
mean_pre
mean_post
sd
Disc_pre
Disc_post
Cronbach’s alpha if item dropped
2i: (−4) – (−1)
0.48
0.49
0.50
0.30
0.26
0.88
2k: (−6) – (−8)
0.08
0.26
0.44
0.35
0.52
0.87
mean_pre
mean_post
sd
Disc_pre
Disc_post
Cronbach’s alpha if item dropped
2i: (−4) – (−1)
0.48
0.49
0.50
0.30
0.26
0.88
2k: (−6) – (−8)
0.08
0.26
0.44
0.35
0.52
0.87
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