or modify, in whole or in part, the findings or recommendations made by the magistrate. The judge may also receive further evidence or recommit the matter to the magistrate with instructions. Pretrial matters that a magistrate judge is precluded from “determining” pursuant to § 636(b)(1)(A) are called “dispositive” because they are “dispositive of a claim or defense of a party.” Fed. R.Civ.P. 72. In determining whether a particular motion is dispositive, this court undertakes functional analysis of the mo tion’s potential effect on litigation. The list of dispositive motions contained in § 636(b)(1)(A) is nonexhaustive, and unlisted motions that are functionally equivalent to those listed in § 636(b)(1)(A) are also dispositive. See Callier v. Gray, 167 F.3d 977, 981 (6th Cir.1999) (<HOLDING>); Massey v. City of Ferndale, 7 F.3d 506,
holding that a motion to intervene is not dispositive of a claim or defense of a party holding that a motion for rule 37 sanctions is dispositive holding that a motion for default judgment is dispositive because it is substantially similar to several of the listed motions holding that a motion to dismiss or for summary judgment precluded default judgment holding that a motion for rule 11 sanctions is dispositive