From: Developing evidence for a validity argument for an English placement exam from multi-year test performance data
2006
2007
2008
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r 2
G1
.67
.45
.68
.47
.70
.49
G2
.54
.21
.53
.22
.19
R1
.64
.41
.42
.66
.44
R2
.71
.50
.76
.58
.75
.56
LS
.81
.65
.82
.83
LD
.69
LA
.48