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The primary aim of the current study was to examine whether neurocognitive functioning among breast cancer survivors (BCS) exposed to systemic adjuvant chemotherapy differs from that seen among BCS who did not receive chemotherapy. The performance of each of these BCS groups was compared to a demographically matched comparison group without history of breast cancer, a group not included in the majority of previous cognitive functioning studies. We also sought to explore whether usage of the anti-estrogen drug tamoxifen, a common component of breast cancer treatment, was related to neurocognitive functioning. Finally, we wished to examine the relationship between subjective report of cognitive functioning and objective performance on neurocognitive measures among BCS. Fifty-three survivors of breast cancer (all between 2–5 years after diagnosis and initial surgical removal of cancerous …