Testing an Explanation for Summer Learning Loss: Differential Examinee Effort Between Spring and Fall.

This article investigates whether summer learning loss (SLL)—the observed decline or stagnation in student achievement over summer break—is influenced by differences in student test effort between fall and spring assessments. Using data from nearly 2.7 million U.S. public school students in grades K–7 who took NWEA's MAP Growth assessments, the study examined multiple metrics of test effort and score quality, including response time effort (RTE), test duration, percent correct, and standard error of measurement (SEM). The findings indicate no substantial seasonal differences in test effort or score quality that would explain SLL patterns, and estimates of summer learning loss remained consistent even after excluding students with signs of low effort. While acknowledging limitations in measuring all forms of disengagement, the study suggests that differential test effort between fall and spring is unlikely to be a primary driver of summer learning loss as measured by MAP Growth assessments.