My colleague at test center A confirmed that the pair with the highest H-H value, 26.00, corresponded to two brothers who sat in adjacent seats at the same venue, but was unable to confirm the other pair due to the unavailability of relevant venue codes.
How do these results compare with those found by Harpp, Hogan, & Jennings (1996)? I have five
H-H values at or above their H-H cut-off of 1.00, and have determined that just two of these five H-H values were corroborated by additional evidence, that is, by the rejection of the corresponding response-independence hypothesis, and by finding that one of the two pairs was indeed seated adjacently. We would think that Harpp, Hogan, & Jennings (1996) would have expected the corroborating evidence to support all five cases, given the findings reported in their article.