Data and Analysis Repository IJSP

Anonymized dataset and data dictionary supporting the manuscript "Adolescent Adjustment During the Work-School Role Transition: A Longitudinal Study of Brazilian Apprentices," submitted to the International Journal of Social Psychology (IJSP). **Study design.** This is a prospective longitudinal panel study of Brazilian adolescent apprentices (Young Apprentice Program), with assessments before starting practical work (Phase 1) and approximately nine months later (Phase 2). Participants were 14-17 years old and enrolled in secondary school at baseline. **Access.** This dataset is shared under RESTRICTED access. Participants were minors recruited through a private educational institution. To protect participant confidentiality, consistent with the terms of the informed consent obtained from participants' legal guardians and the approval of the Human Research Ethics Committee of Mackenzie Presbyterian University (approval no. 4.449.602), the dataset is available to qualified researchers upon reasonable request. To request access, please describe your intended use of the data and confirm your institutional affiliation; requests are reviewed by the corresponding author. **Contents.**- README: overview, key derived variables, and notes on linking the two data sheets.- Baseline_EN: Phase 1 intake data (n = 935).- Longitudinal_EN: paired Phase 1 + Phase 2 data for participants reassessed at follow-up (n = 391).- Sample_Flow: verified participant flow from initial assessment (n = 935) to the final analytic sample (n = 369), with the exact variable and coding rule applied at each exclusion step.- Dictionary: variable-by-variable documentation (original Portuguese item, English description, coding/values), bilingual.- Anonymization_Log: fields removed prior to publication and the rationale for each. **Measures.** Strengths and Difficulties Questionnaire (SDQ; Goodman, 1997; Brazilian validation: Fleitlich et al., 2000) and its Impact Supplement, administered at Phase 1 and Phase 2. Brazilian Economic Classification Criterion (ABEP) household/socioeconomic items. Sociodemographic and apprenticeship-program items. **De-identification.** Direct identifiers (full name, date of birth, employer name, program dates, institutional branch/unit) and sensitive free-text fields were removed prior to deposit. Participant IDs were replaced with newly generated pseudonymous codes with no link to institutional records. See the Anonymization_Log sheet for full details. **Code availability.** No custom analytic code is required to reproduce the reported analyses beyond standard R functions. The analysis command sequence retained by the authors may be requested from the corresponding author. **Citation.** If you use this dataset, please cite the associated article (full citation to be added upon publication).