Trained research assistants later coded the task using the DVD recording of the laboratory session. The proportion of correctly sorted post-switch trials was calculated and used in the analyses. Twenty-two children were not administered this task because they did not participate in the 3-year lab visit; 9 were not administered this task due to child refusal or emotional distress; 14 failed the pre-switch phase and thus were not administered post-switch trials; 1 was unable to be scored due to recording error. Reliability coding for this task was accomplished on 23% of the sample and the ICC was found to be within acceptable range (.96).
