“…Dumay, Coe, and Anumendem (2014) found that, on average, across cohorts 74% of the total slope variance was accounted for by the school-level slope variance, whereas residual gain scores analysis showed a proportion attributable to schools of just 16% on average, across cohorts. Anumendem, De Fraine, Onghena, and Van Damme (2017) showed considerable discrepancies between intra-class correlations expressed as adjusted performance status and growth; according to one of their models, this discrepancy is as high as 0.18 for performance versus 0.66 for the growth model. Palardy (2008) reported more modest discrepancies in the intra-class correlations for performance status and growth (.20 versus .23 in the full sample, 13 versus .25 and .07 versus .14 among low-and high-scoring schools, respectively).…”