To identify the most effective strategies for implementing and sustaining Tier 2 and 3 behavior support systems, a measure of general and tier-specific factors hypothesized to predict sustained implementation is needed. To address this need, we conducted two studies examining the construct validity of the Advanced Level Tier Interventions Treatment Utilization and Durability Evaluation (ALTITUDE) measure: one assessing the content aspects of construct validity (Study 1) and one assessing the structural and external aspects of construct validity (Study 2). In Study 1, participants included an expert panel of 26 members who provided iterative feedback during measure development. The results showed strong content representativeness (content validity index = .93) for assessing elements indicating sustainability. In Study 2, participants were school personnel from 646 schools who completed the measure. The results showed model fit was good for both a three-factor correlated model (CFI = .98, RMSEA = .06, SRMR = .05) and Bifactor S-1 model with correlated Tier 2 and Tier 3 specific residual factors (CFI = .98, RMSEA = .06, SRMR = .05). In addition, ALTITUDE latent factors were found to have both convergent and discriminant evidence in relation to concurrent fidelity of school-wide positive behavioral interventions and supports (SWPBIS) implementation at Tiers 1, 2, and 3. This construct validity evidence will support the use of the ALTITUDE in identifying the strongest tier-general and tier-specific predictors of sustained implementation of Tier 2 and 3 behavior support systems.

为了确定实施和维持第 2 层和第 3 层行为支持系统的最有效策略，需要对假设的一般和特定层因素进行衡量以预测持续实施。为了满足这一需求，我们进行了两项研究，检验了高级干预措施的使用和耐久性评估的结构有效性(ALTITUDE) 测量：一项评估构念效度的内容方面（研究 1），一项评估构念效度的结构和外部方面（研究 2）。在研究 1 中，参与者包括一个由 26 名成员组成的专家小组，他们在度量开发过程中提供迭代反馈。结果表明，评估表明可持续性的元素具有很强的内容代表性（内容有效性指数 = .93）。在研究 2 中，参与者是来自 646 所学校的完成测量的学校工作人员。结果表明，模型拟合对于三因子相关模型（CFI = .98，RMSEA = .06，SRMR = .05）和具有相关的 Tier 2 和 Tier 3 特定残差因子的 Bifactor S-1 模型（CFI = .98，RMSEA = .06，SRMR = .05）。此外，