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**Original Article Citation**: Bressan, P. & Stranieri, D. (2008). The best men are (not always) already taken: Female preference for single versus attached males depends on conception risk. *Psychological Science, 19,* 145-151. - View all the lab study materials: At the [Materials][1] node, or at the [Bressan Lab Study Materials GoogleDoc][2] - Run through the online secondary replication here: [Bressan Online Secondary Replication][3] **Target of replication.** The finding we are attempting to reproduce is that women with a partner will prefer attached men during the less fertile days of their cycle and single men during the more fertile days of their cycle, while single women will show no such preference. **A priori replication criteria.** A successful replication would show a statistically significant three-way interaction with man's availability, participant's conception risk, and participant's partnership status such that man’s availability and participant’s conception risk interact significantly for partnered women but not for unpartnered ones. In particular, this interaction should show that women with a partner will prefer attached men during the less fertile days of their cycle and single men during the more fertile days of their cycle. **Materials, Data, and Report.** Study materials can be found in the [Materials][4] component of this project. Pre-planned cleaning and analysis scripts (including a priori power analyses) can be found in the [Cleaning and Analysis][5] node. The raw and cleaned data are posted in the [Dataset][6] node once data collection is complete. The full replication report and other materials are in the files section of this node. **Response from original author:** Paola Bressan provided her response to the replication attempts. A this commentary is available [here][7]. To summarize: If one ensures that, as required by the theory laid out by Bressan and Stranieri (2008), participants are likely to perceive their current partner as the one who will help them raise their children, Frazier and Hasselman’s lab and online studies do replicate Bressan and Stranieri’s findings. [1]: http://openscienceframework.org/project/bLCj6/node/YjLhk/wiki/home [2]: https://docs.google.com/folder/d/0B89dPTKQmKWIaGl0WndYY0Q3OEU/edit [3]: https://dw2.psyc.virginia.edu/implicit/Launch?study=/user/bfrazier/bressan/bressan.expt.xml&refresh=true [4]: http://openscienceframework.org/project/bLCj6/node/YjLhk/wiki/home [5]: http://openscienceframework.org/project/bLCj6/node/tAVGd/wiki/home [6]: http://openscienceframework.org/project/bLCj6/node/yHzrT/wiki/home [7]: https://osf.io/xcrm2/