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. 2018 Apr;54:48–61. doi: 10.1016/j.learninstruc.2017.08.001

Table 4.

Mean assignment demand by scale (SD)(n) including differences between typical and challenging scales.

Scale Math
Typical
Mean Differencea Math
Challenging
Scale ELA
Typical
Mean Differencea ELA
Challenging
Written Communication
(3-point scale)
1.52 (0.60)
(900)
0.21∗∗∗
ES = 0.35
1.73 (0.68)
(448)
Elaborated Communication
(4-point scale)
2.01 (0.96)
(895)
0.66∗∗∗
ES = 0.69
2.66 (1.08)
(443)
Conceptual Understanding
(4-point scale)
2.19 (0.44)
(901)
0.10∗∗∗
ES = 0.23
2.29 (0.54)
(447)
Construction of Knowledge
(3-point scale)
1.57 (0.69)
(899)
0.43
ES = 0.62
1.99 (0.77)
(444)
Real-World Connection
(4-point scale)
1.50 (0.63)
(901)
0.13∗∗∗
ES = 0.21
1.61 (0.70)
(446)
Real-World Connection
(4-point scale)
1.27 (0.53)
(899)
0.22
ES = 0.42
1.49 (0.64)
(448)

Note. For this analysis the n reflects total number of ratings contributing to the scale, including cases with two ratings.

*p < 0.05, **p < 0.01, ***p < 0.001.

a

ES stands for effect size.