. Author manuscript; available in PMC: 2013 Feb 3.

Published in final edited form as: Read Psychol. 2012 Feb 3;33(1-2):133–161. doi: 10.1080/02702711.2012.631863

Table 2.

Test Re-test Reliability across Alternate Forms for ORF Median and Mean Score across Time Points and z-score test of the Difference in Test Re-test Reliability across Alternate Forms for Testing Time Points 1–5

	Test Re-test Reliability across Alternate Forms for the ORF Median and Mean Score (Time Point 1 with Time Points 2–5)

	Time Point 1 – Time Point 2	Time Point 1 – Time Point 3	Time Point 1 – Time Point 4	Time Point 1 – Time Point 5
Median	.91	.90	.89	.87
Mean	.92	.91	.90	.88

	Testing the Magnitude of the Difference between the Test Re-test Reliability ORF Median and Mean Score (Time Point 1 with Time Points 2–5)

	Time Point 1 – Time Point 2	Time Point 1 – Time Point 3	Time Point 1 – Time Point 4	Time Point 1 – Time Point 5
Median vs. Mean	−1.58 ^a	−1.42 ^a	1.29 ^a	−1.20 ^a

Note. n = 1317.

alternate form reliability of ORF Median Score is statistically higher than ORF Mean Score;

alternate form reliability of ORF Mean Score is statistically higher than Median Score. Alpha per comparison = 0.05/2 = 0.025. Critical z = 2.33.