Penelitian ini bertujuan untuk melihat apakah pemikiran berulang terkait pekerjaanmemediasi hubungan antara stres kerja dan kualitas tidur pada sampel karyawan startup.Penelitian sebelumnya menemukan pemikiran berulang signifikan memediasi hubunganantara kelelahan bekerja dan kualitas tidur hanya pada dimensi affective rumination saja.Responden penelitian ini berjumlah 150 orang karyawan perusahaan startup denganlokasi kantor yang tersebar di wilayah Jabodetabek. Sebagai perusahaan baru, jumlahkaryawan startup masih tergolong sedikit dengan beban kerja yang cukup tinggi karenaharus selalu mengikuti perkembangan pasar dan teknologi. Kualitas tidur diukur denganPittsburgh Sleep Quality Index (PSQI), stres kerja diukur melalui Job Stress Survey(JSS), dan pemikiran berulang diukur dengan Work-Related Rumination Questionnaire(WRRQ). Hasil analisis mediasi menunjukkan bahwa terdapat indirect effect (ab =0,036, p < 0,05) dan direct effect (c’ = 0,114, p < 0,05) hanya pada dimensi affectiverumination saja.

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This study aims to see whether work-related rumination mediate the relationship

between work stress and sleep quality in a sample of startup employees. Previous

research has found that work-related rumination significantly mediates the relationship

between work fatigue and sleep quality only in the affective rumination dimension. The

respondents of this study were 150 startup company employees with offices located in

the Greater Jakarta area. As a new company, the number of startup employees is still

relatively small with a fairly high workload because they because they have to follow

the development of markets and technology. Sleep quality is measured by the Pittsburgh

Sleep Quality Index (PSQI), work stress is measured through the Job Stress Survey

(JSS), and work-related rumination is measured by Work-Related Rumination

Questionnaire (WRRQ). The results of the mediation analysis showed that there were

indirect effects (ab = 0.036, p <0.05) and direct effects (c' = 0.114, p <0.05) only in the

affective rumination dimension.