The Family Outcomes Survey–Revised (FOS-R) measures family outcomes of services for young children with disabilities or developmental delays, and can be used to investigate change in outcome achievement over time. To confirm the validity of FOS-R change scores, it must be established that the FOS-R measures the same construct over time; if so, score changes can be attributed to family outcome achievement. However, if not, interpretation of change scores may be misleading. Caregivers (N = 349) of Singaporean children with developmental delays receiving early intervention services completed the FOS-R Part A twice, approximately 1 year apart. Factor analysis was used to confirm the structure of the FOS-R Part A and to assess whether the scale measures the same thing across time (i.e., longitudinal measurement invariance). Results provided support for partial longitudinal measurement invariance, indicating that change scores on this scale can be validly interpreted with certain caveats.

修订后的家庭结果调查（FOS-R）衡量了为残疾或发育迟缓的幼儿提供的服务的家庭结果，可用于调查结果成就随时间的变化。为了确认FOS-R变化评分的有效性，必须确定FOS-R随着时间的推移测量相同的结构。如果是这样，分数的变化可以归因于家庭的成就。但是，如果不是这样，对变更分数的解释可能会产生误导。护理人员（Ñ= 349）接受早期干预服务的发育迟缓儿童，两次完成FOS-R A部分，相隔大约一年。因子分析用于确认FOS-R Part A的结构，并评估量表是否随时间测量同一东西（即纵向测量不变性）。结果为部分纵向测量不变性提供了支持，表明通过一定的警告可以有效地解释此尺度上的变化得分。