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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: Res Sci Educ. 2017 Nov 21;49(6):1783–1808. doi: 10.1007/s11165-017-9675-6

Table 5.

Standardized means and standard deviations across Class Level within Year.

Year CP Collab CP Honor Gifted

Mean SD N Mean SD N Mean SD N Mean SD N
1 Pre
Post
−.799
−.378
.752
.588
45 −.668
−.576
.553
.656
133 −.288
.061
.545
.531
112 .265
.692
.504
.499
117

Within year diff .421 .092 .349 .427

2 Pre
Post
−.886
−.174
1.632
.622
34 −.551
−.059
.580
.534
87 −.280
.650
1.352
.500
86 .120
.958
1.127
.553
100
Within year diff .712 .492 .930 .838

Across year diff .291 .400 .581 .411