From: Developing evidence for a validity argument for an English placement exam from multi-year test performance data
2009
2010
2011
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r 2
G1
.69
.47
.68
.46
.48
G2
.55
.20
.53
.22
R1
.65
.43
.63
.39
.62
.38
R2
.74
.54
.75
.57
LS
.79
.80
LD
.82
.81
.66
LA
.44
.67
.45