What is the test for remanding a decision by the Social Security Commissioner to award benefits?

"The court shall have the power to enter, upon pleadings and transcript of record, a judgment affirming, modifying, or reversing the decision of the Secretary, with or without remanding the cause for a rehearing." 42 U.S.C. 405(g). In social security cases, the decision to remand to the Commissioner to award benefits is within the court's discretion. McAllister v. Sullivan, 888 F.2d 599, 603 (9th Cir. 1989). "If additional proceedings can remedy defects in the original administrative proceedings, a social security case should be remanded. Where, however, a rehearing would simply delay receipt of benefits, reversal and an award of benefits is appropriate." Id. (citation omitted).