Do Theory of Mind and Mental Time Travel abilities build on joint cognitive foundations?

The dataset comprises structured developmental behavioral data obtained from four studies with 3- to 9-year-old children investigating the relationship between Theory of Mind (ToM) and Mental Time Travel (MTT) abilities. It includes trial-level performance measures from first-, second-, and third-order false belief tasks operationalizing ToM, and corresponding first-, second-, and third-order temporal reasoning tasks operationalizing MTT. For each trial, the dataset contains individual accuracy outcomes for ToM and MTT tasks. Participant demographic information (age in months, gender), study identifiers, and complete metadata on experimental design and scoring procedures can be provided. Data were collected under standardized developmental testing protocols across multiple sessions.