OPINION OF THE COURT
Plaintiff Xiao Yang Chen and defendant Ian Ira Fischer were married on March 11, 2001. Shortly thereafter, Fischer commenced an action for divorce on the ground of cruel and inhuman treatment. Chen counterclaimed for divorce—also alleging cruel and inhuman treatment—and asserted an additional cause of action for fraudulent inducement. Specifically, as grounds for divorce, Chen alleged that on May 6, 2001, Fischer “grabbed [her] and violently slapped her across the face and ear causing *99 [her] to suffer bruising, pain and swelling” and that he threw her on the ground and attempted to suffocate her. As a result of that incident, eaсh party filed a family offense petition against the other in Family Court and received a temporary order of protection. The parties agreed to consolidate these petitions with the matrimonial action. At the conclusion of the matrimonial trial, they further agreed to withdraw the petitions without prejudice on the record in open court.
On October 15, 2001, prior to trial of the matrimonial action, the parties entered into a stipulation on the issue of fault. “[I]n satisfaction of the stipulation,” the parties agreed to withdraw all their fault allegations—including those related to the May 6 incident—save one. Aftеr trial on the remaining issues—including equitable distribution and a fraudulent inducement cause of action—on May 8, 2002 a dual judgment of divorce was granted on the ground of cruel and inhuman treatment based on each party’s sole remaining fault allegation.
Chen allegedly commenced the instant personal injury action on January 18, 2002, while the matrimonial action was pending. 1 The complaint asserted two causes of action—one for intentional infliction of emotional distress and a second for assault and battery. As to the second cause of action, the complaint alleged that on May 6, 2001, Fischer slapped her in the faсe and ear, causing permanent injury, necessitating continuing medical treatment and rendering her unable to perform her usual and customary activities. Fischer answered, raising several affirmative defenses, including res judicata and various theories of estoppel.
Fischer moved to dismiss the complaint pursuant to CPLR 3211 (a) (5) and Chen cross-moved to dismiss several of Fischer’s affirmative defenses. Supreme Court granted Fischer’s motion and denied Chen’s cross motion. The court found that the allegations in Chen’s personal injury action were “virtually identical” to those in her counterclaim for divorce and arose out of the same trаnsaction or series of transactions. Thus, the court determined that the tort action was barred by res judicata.
The Appellate Division affirmed, agreeing that the action was barred because the tort claim could have been litigated with the divorce action and Chen did not expressly reserve the right to
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bring that claim when she withdrew her fault allegations for purposes of the stipulation. The Court extended the rule wе set forth in
Boronow v Boronow
(
Typically, principles of res judicata require that “once a claim is brought to a final conclusion, all other claims arising out of the same transaction or series of transactions are barred, even if based upon different theories or if seeking a different remedy”
(O’Brien v City of Syracuse,
It is not always clear whether particular claims are part of the same transaction for res judicata purposes. A “pragmatic” test has been applied to make this determination—analyzing “whether the facts are related in time, space, origin, or motivation, whether they form a convenient trial unit, and whether their treatment as a unit conforms to the parties’ expectations
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or business understanding or usage” (Restatement [Second] of Judgments § 24 [2];
see Smith v Russell Sage Coll.,
Applying these principles, it is apparent that personal injury tort actions and divorce actions do not constitute a convenient trial unit. The purposes behind the two are quite different. They seek different types of relief and require different types of proof. Moreover, a рersonal injury action is usually tried by a jury, in contrast to a matrimonial action, which is typically decided by a judge when the issue of fault is not contested. Further, personal injury attorneys are compensated by cоntingency fee, whereas matrimonial attorneys are prohibited from entering into fee arrangements that are contingent upon the granting of a divorce or a particular property settlement or distributive award (see Code of Professional Responsibility DR 2-106 [c] [2] [i] [22 NYCRR 1200.11 (c) (2) (i)]).
This case is distinguishable from the situation presented by
Boronow.
There, we noted that title issues are “intertwined” with the dissolution of the marriage relationship and could usually “be fairly and efficiently resolved” along with the matrimonial action
(see Boronow,
Significant policy considerations also support this conclusion. To require joinder of interspousal personal injury claims with the matrimonial action would complicate and prolong the divorce proceeding. This would be contrary to the goal of expediting these proceedings and minimizing the emotional damage to the parties and their families. Delaying resolution of vital matters such as child support and custody or the distribution of assets to await the outcome of a personal injury action could result in extreme hardship and injustice to the families involved, especially for victims of domestic viоlence. In addition, parties should be encouraged to stipulate to, rather than litigate, the issue of fault
(see Blickstein v Blickstein,
Unlike the Appellate Division, we dеcline to adopt the reasoning of the New Jersey Supreme Court in
Tevis v Tevis
(79 NJ 422,
Here, although the personal injury claim could have beеn litigated with the matrimonial action—as the facts arose from the same transaction or series of events—it was not, as all of Chen’s fault allegations, save one, were withdrawn by stipulation for the salutary purрose of expediting the matrimonial action. She is therefore not precluded from litigating that claim in a separate action.
Parties are free, of course, to join their interspousal tort clаims with the matrimonial action (see CPLR 601 [a]) and the trial court retains discretion to sever the claims in the interest of convenience, if necessary (see CPLR 603). If a separate inter-spousal tort action is contemplated, however, or has been commenced, the better practice would be to include a reservation of rights in the judgment of divorce. Finally, if fault allegations are actually litigated in a matrimonial aсtion, res judicata or some *103 form of issue preclusion would bar a subsequent action in tort based on the same allegations.
Accordingly, the order of the Appellate Division should be reversed, with costs, and thе case remitted to Supreme Court for further proceedings in accordance with this opinion.
Chief Judge Kaye and Judges G.B. Smith, Rosenblatt, Graffeo, Read and R.S. Smith concur.
Order reversed, etc.
Notes
. The original complaint is not part of thе record. The only version of the complaint in the record is an incomplete second amended complaint dated May 10, 2002—subsequent to the judgment of divorce.
. The Appellate Division, citing
Weicker v Weicker
(
. Smith and Reilly cited section 61 from Tentative Draft No. 1 of the Restatement (Second) of Judgments, which has since been adopted at section 24 of the current Restatement.
