Mean multiplicative shear bias measured for pairs of simulated galaxies (see Section 3.2 for details) at various separations. At each separation, a large number of trials was generated with random orientations of the pair. At 4.″0 separation, two objects were detected in all cases. At 1.″5 two objects were detected in half the cases. At 1.″0 a single object was detected in all cases. Red triangles represent standard METACALIBRATION with MOF deblending for modeling all detected objects. Blue circles represent METACALIBRATION+MOF with detection included as part of the process. Green pluses represent METACALIBRATION with detection included but without deblending, and using simple weighted moments without PSF correction as the shear estimator. Very large biases are seen for standard METACALIBRATION+MOF as detection becomes ambiguous at, for example, 1.″5 separations. When detection is included in the METACALIBRATION process the biases are greatly reduced. The bias is reduced even in the case where no deblending was performed and no PSF correction or detailed object modeling were performed. This indicates that a majority of the bias is due to shear-dependent detection, not light blending or details of the object modeling.