Hale, J.
A law teacher and two of his students, conducting a class research project, were permitted by superior court order to examine 189 randomly selected mental illness files. Citing RCW 71.02.250, relating to mental illness cases, the prosecuting attorney and others challenge this order as a breach of confidentiality.
The statute reads:
All files in these cases shall be closed files subject to examination only on court order: Provided, however, That this shall not apply to duly authorized representatives of the department of institutions designated by the director insofar as it may be necessary for the department to examine data, other than medical reports, to determine financial responsibility for the expense of care and treatment of the patient. Where a person is found mentally ill the clerk shall cause the following facts to be noted in his probate docket: Name and age of such person, date of order of hospitalization, place of hospitalization, date of parole and date of discharge. Where a person is found not to be mentally ill the clerk shall cause such proceedings to be noted in an alphabetically arranged index, which index shall contain the following information: Name of person filed against, date of order dismissing proceedings, and probate cause [14]*14number. This index shall be open to inspection only under court order. Nothing in this section shall be construed-to prevent the forwarding of all case histories, physicians’ reports, and other case data to the state hospital or other agency in which a mentally ill person may have been ordered hospitalized.
(Italics ours.) RCW 71.02.250. Complementing this statute, another section provides for closed mental illness hearings unless an open hearing is demanded or there is to be a jury trial. RCW 71.02.160. These statutes, affording as they do a statutory right to privacy, represent a diametric departure from the general rule that court records and files are public records, open to public inspection at reasonable times and places.
John M. Junker, Associate Professor of Law, University of Washington Law School, as a regular part of the lav/ school curriculum, taught a 6-hour course, Law 614, described as a seminar in criminal procedure. After preliminary conversation on the subject, Professor Junker, October 29, 1969, wrote to Judge Solie M. Ringold, Chairman of the King County Superior Court’s Domestic Relations and Family Court Committee, requesting authority from that committee for two of his students to examine the closed mental illness files, observe mental -illness commitment proceedings and interview personnel officially concerned with such proceedings. Mentioning the confidentiality of these files, the letter acknowledged that such authorization “be conditioned upon guarantees of anonymity.” It named Mr. Joe Bumstin, a third-year law student, and Mrs. Virginia McBroom, a graduate student in sociology, as the students for whom the permission was sought.
Judge Ringold replied by letter on November 5, 1969, to Professor Junker, stating that the Domestic Relations and Family Court Committee had granted the request and would permit Mr. Burnstin and Mrs. McBroom to observe mental illness commitment proceedings, conduct staff interviews and examine the court’s files. The letter said that [15]*15a court order would be required designating the specific files to be opened, that “anonymity of the parties involved will be maintained at all times” and that “We are all aware of the necessity for confidentiality.”
Professor Junker, November 26, 1969, in a cause entitled “In re One Hundred Eighty-Nine Randomly Selected Case Files,” presented ex parte to Judge Ringold a combined motion and order which listed by number 189 superior court mental illness cases, selected at random, beginning with number 37,000 and increasing irregularly to number 37,747. The motion-order recited that the 189 listed files represented a random sampling of 25 per cent of the mental illness cases filed in King County Superior Court between October 1, 1968, and September 30, 1969. It declared that, among the objectives of the project, Mr. Burnstin and Mrs. McBroom were to collect data showing the relationship between the applicant for and the subject of the involuntary mental illness proceedings; the patient’s age, sex, race, and marital status; the “relationship between the applicant’s allegations of mental illness and the diagnosis, or lack thereof, of mental disorder;” and the nature of the mental illness for which involuntary hospitalization was sought. Directing that Joseph Burnstin and Virginia Mc-Broom be permitted, under the general supervision of Professor Junker, to examine the enumerated 189 files, the order declared that confidentiality of the files be maintained and that the anonymity of any person identified in them be preserved. On presentment, it was signed and entered by Judge Ringold November 26, 1969.
These files, it should be noted, represented current court business between October 1, 1968 and September 30, 1969, concerning persons alleged to be mentally ill. The motion-order does not indicate on its face who actually presented it to the court, but the motion segment bears the signature of Professor Junker. No file number appears on the order except that beneath the judge’s signature is the notation “See file 37000 for original signature” which number is the first of the 189 cases listed. Handwritten [16]*16in large numbers on the upper right segment where the file number is usually placed is the number 37,700, this number being 180th in the list of 189 files. Presumably, this was a means of filing a copy of the order in each of the 189 files. The only notice of presentment of the order— so far as the record reveals — was the letter to and conversation with Judge Ringold. Its entry, therefore, must be deemed ex parte and without notice.
With the entry of the order on November 26, 1969, respondents Burnstin and McBroom began to examine and continued during the remainder of November and through December and January to open and read the 189 listed files and to record their observations in writing and by tape recorder. Each of these 189- files purports to contain significant data and information about the individual who is the subject of the mental illness application, including psychiatric and medical observations, military records, a record of mental illne'ss in the family, marital history, use of alcohol and drugs, previous physical and mental illnesses and surgery, earlier commitments and references to suicidal, homicidal, criminal and antisocial behavior. Usually there is some information in these files as to the financial position of both the patient and members of his family.
Things went along quietly under the aegis of the order during the weeks that the files were opened and examined. Then the litigation began, and the ex parte order of November 26, 1969, proliferated. The King County Prosecuting Attorney, alleging that the 189 persons whose files had been opened had suffered an unwarranted breach of privacy, started things moving on February 4, 1970, by demanding a temporary and a permanent injunction to prevent Professor Junker, Mr. Burnstin and Mrs. McBroom from revealing, using, disseminating or communicating any of the information obtained from the 189 files. The complaint asked that all notes, memoranda and tapes made during the inspection be destroyed unless the individual subjects of the mental illness files, or their legal representatives, would consent in writing to their continued [17]*17possession and use by the two students and Professor Junker.
Judge Stanley C. Soderland of the superior court heard the first phase February 4, 1970, and issued that day a temporary restraining order and order to show cause which directed that, pending further hearings, no disclosures or revelations be made from the files. February 16, 1970, Herbert I. Lakefish filed a complaint in intervention saying that he had been appointed and served as guardian ad litem in mental illness cases numbers 37,256, 37,674, 37,715, 37,650 and 37,669, among those listed and, as an erstwhile guardian ad litem, had a justiciable interest in maintaining the confidentiality of the files. He requested that there be a permanent injunction against further use or disclosure of their contents. March 4,1970, another judge, Judge Frank H. Roberts, directed that Mr. Lakefish be allowed to intervene on behalf of the individual parties represented by the listed numbers “and on behalf of other guardians ad litem similarly situated.”
In the meanwhile, the University of Washington Board of Regents, February 20, 1970, filed its complaint in intervention stating that Professor Junker’s project was one of many research activities carried on by the University and expressed confidence that the two students would respect the rule of confidentiality as assured by the court order. It stated further that the University would suffer irreparable harm if the research were halted. March 5, 1970, relator prosecuting attorney and intervenor Lakefish filed a “Motion to Vacate Order In re One Hundred Eighty-Nine Randomly Selected Case Files” of November 26, 1969. On the same day, Professor Junker and his two students moved to dismiss relator’s complaint for injunction. The motion to vacate came on before a different department, Judge Ward Roney, who, March 5, 1970, entered an order continuing in force the earlier temporary injunction and directed that the cause be transferred to Judge Ringold for reconsideration of the initial ex parte order of November 26, 1969. March 6, 1970, Judge Ringold ordered that [18]*18the Board of Regents be allowed to intervene. The American Civil Liberties Union thereafter entered the case on appeal to take both sides, filing a brief amicus curiae which supports affirmance and reversal.
Thus, events came full circle and the main issues now came on for hearing before the very court which had originally issued the first ex parte order of November 26, 1969, except that what had earlier been ex parte had by then become militantly adversary. Judge Ringold heard both the researchers’ motion to dismiss the complaint and relator’s motion to vacate the original order. Counsel for relator, however, stated for the record that he did not know that the court was to hear both motions; he said that relator intended to argue only his motion to vacate the first order and not the researchers’ motion to dismiss relator’s complaint.
Relator objected to that particular judge passing on the researchers’ motion to dismiss the relator’s complaint because that motion, he said, went beyond the question of the court’s initial discretion and into the merits of the cause. Relator contended that his motion to vacate the order of November 26, 1969, raised the issue of whether the court had abused its discretion in entering the order of November 26, 1969. The Board of Regents’ and the researchers’ motion to dismiss relator’s complaint, he urged, evoked the larger and ultimate issues of whether, without notice to the parties or to someone designated to represent them, the 189 files should be opened. Relator argued that the research going on was no more than a classroom project and did not constitute a research project by the University of Washington.
Raising another point, relator and intervenor Lakefish suggested that Judge Ringold ought not hear intervenor Board of Regents’ motion to dismiss relator’s complaint for injunction because that motion was supported by an affidavit signed by Judge Ringold. Deeming the issues to be largely coextensive, the court, despite the objections, heard both motions. In written orders dated March 9, 1970, [19]*19it denied relator’s motion to vacate the order of November 26, 1969, and granted intervenor’s motion to dismiss relator’s complaint for injunction. Relator and intervenor Lake-fish now seek review of the two orders.
The question raised as to the judge’s affidavit should be considered first. Although relator’s motion to dismiss, dated February 18, 1970, and filed February 20, 1970, was apparently presented by counsel for intervenor Board of Regents, it recites that it was made by respondents Junker, Burnstin and McBroom. The motion states that it is based on the files and attached affidavits, among which, as noted, was the affidavit of Judge Solie M. Ringold, dated and served upon relator and intervenor Lakefish February 20, 1970. That affidavit, running to three double-spaced, legal-sized pages, stated that Judge Ringold was chairman and named two other judges as members of the Domestic Relations and Family Court Committee of the King County Superior Court. It said that, in a mental illness case, one of the King County judges had ruled that a guardian ad litem must be appointed in all involuntary mental illness applications; that the committee had recommended, and the superior court judges had unanimously adopted, that ruling as an official policy; and that, after November 20, 1969, guardians ad litem would be routinely appointed by the court. The affidavit said that on October 23,1969, a court commissioner had advised the committee that “The problem of miscellaneous students and observers at the mental illness hearings is still with us,” and had requested a ruling from the judges on that matter.
The affidavit said that Judge Ringold’s committee had given consideration to the appointment of counsel for persons not otherwise represented, and referred to a ruling by one of the judges who had decided that such appointments must be made in a mental illness case and that the judges of the superior court had unanimously declared it a policy that legally trained guardians ad litem be appointed for all unrepresented individuals subject to mental illness proceedings. Judge Ringold’s affidavit stated that [20]*20the superior court committee had thereupon placed upon a superior court commissioner a duty to see that guardians ad litem were routinely appointed. The affidavit said that, in considering Professor Junker’s request, Judge Ringold and the other two judges on the committee unanimously agreed that the “policy of the Committee would permit interviews of intake and court personnel and viewing of files if it served a valid research and educational purpose, and providing confidentiality were maintained.” Apparently in answer to other affidavits, Judge Ringold’s affidavit also stated that the court has designated persons other than the prosecuting attorney such as employees of the court to screen mental illness applications. Thus, the affidavit set forth more than purely formal or perfunctory matters of fact. Setting forth, as it did, the conclusions of other judges, the affidavit implied that the order of November 26, 1969, granting permission was a part of a judicially approved plan to open up the mental illness cases to public view and was partly related in some way with concepts of due process of law. The order dismissing relator’s complaint signed by Judge Ringold March 9, 1970, listed this affidavit as the 11th among 16 enumerated items in reciting the evidence considered by the court in reaching a decision. We think it error for the court to have considered and passed upon a motion supported by an affidavit of the court which set forth substantive matters of fact and argument.
Only in the rarest of circumstances should a judge be called upon to give evidence as to matters upon which he has acted in a judicial capacity, and these occasions, we think, should be limited to instances in which there is no other reasonably available way to prove the facts sought to be established. A record of trial or a judicial hearing speaks for itself as of the time it was made. It should reflect, as near as may be, exactly what was said and done at the trial or hearing. Except when ruling upon the admissibility of evidence, or on motions, or in making findings and conclusions, or in rendering oral or written mem-[21]*21oranda of decisions, a judge need not supply for the record an analysis of the mental processes by which he reached a conclusion either of fact or law. Aside from matters taken under judicial notice or formal matters omitted through inadvertence or oversight and readily available to all parties, the record for review must be accepted as it was made, as of the time it was made.
Judge Ringold’s affidavit was filed February 20, 1970, long after the commencement of relator’s suit for injunction. It went far beyond purely formal matters to set forth the conclusions of two other judges supporting the exercise of discretion. It pointed out that Judge Ringold was chairman of a committee of judges directing and supervising superior court actions and setting policy in domestic relations and family court matters. In saying that the whole court had decided to provide counsel to serve as guardians ad litem for all unrepresented parties in mental illness cases, the affidavit suggested that the judges’ decision to accomplish these things was in some way connected with and supported both the research and order of November 26, 1969, opening the files.
Relating back as it did to matters and events occurring prior to the November 26, 1969, order, the affidavit constituted substantial evidence and argument admitted and weighed by the court in support of the court’s ruling upholding its discretion in issuing that order. A determination of whether that discretion had been soundly exercised ought not have been made by the same judge who executed the affidavit.
This amounts to no more than a sensible application of the rule that a judge is disqualified from hearing a cause if it appears that he will be called as a witness in it. State v. Sefrit, 82 Wash. 520, 144 P. 725 (1914). If the cause is actually on trial before him, the judge should not take the stand as a witness. Maitland v. Zanga, 14 Wash. 92, 44 P. 117 (1896). See, also, 46 Am. Jur. 2d Judges §§ 112-14 (1969). It was, therefore, error for the court to retain jurisdiction of the cause, and both motions should have [22]*22been transferred for hearing to another department of the court.
This brings us to the main issues: Does the entire record support the issuance without notice of the order of November 26, 1969? Assuming sufficient notice of one kind or another to persons having an interest in preserving the confidentiality contemplated by statute, did the order adequately preserve the statutory privilege? We are not concerned here with the steps which the superior court may take consistent with the statutory rights: of privacy to assure that mental illness hearings do not deteriorate into Star Chamber trials. The protection of persons who may be subject to mental illness proceedings is not before us for the issues do not embrace such questions. This is not an examination into whether the King County Superior Court affords due process of law to persons charged with being mentally ill, for no one in the case has asserted that they do not. The ultimate question is whether the court, on the Showing made and without notice, properly ordered the files opened to the research team.
Petitions or applications for involuntary hospitalization because of mental illness are heard by the superior court. RCW 71.02.090. Anyone subjected to such an application may demand a jury trial. RCW 71.02.210. Although the mental illness proceeding does involve a final determination which may deprive one of his liberty and subject him against his will to medical treatment, confinement or restriction in one degree or another, the law contemplates that the atmosphere and proceeding shall be clinical rather than penal in character. Persons suffering from a mental or emotional illness are to be treated with the same sympathy and compassion as are persons suffering from a physical sickness or infirmity.
Apparently the legislature — consistent with due process of law and avoidance of the Star Chamber — believed that one way to encourage a clinical approach, maintain a clinical atmosphere, and sublimate any penal aspects of mental illness, is to avoid making public spectacles of the mentally [23]*23ill and to close the files. There are other reasons, too, for directing that the files be closed, not the least of which is that witnesses, members of the family, and others interested in the proceeding may act and speak with candor and forthrightness under the statutory theory that in most instances the proceeding is undertaken for the good of the subject and with the intention of getting a sick person into a hospital where he may receive medical care, and that the benefits of confidentiality and privacy far outweigh the dangers of Star Chamberism.
Mental illness files thus are closed files under RCW 71.02.250, in effect since 1951. Laws of 1951, ch. 139, § 38, p. 353; cf. prior, Laws of 1949, ch. 198, § 13, p. 609. The legislature, in directing that the files be closed, has done so in general language — leaving their opening to the discretion of the court. Under this statute, all persons connected with the mental illness proceedings, including the putative patient, are assured by law of a high degree of privacy — one to be breached only when a judge of the superior court, in the exercise of a sound discretion, decides that opening the files will not harm or embarrass anyone connected with the case, or that an overriding benefit, private or public, will accrue to offset any likely detriment. Thus, one seeking the right of inspection is obliged to demonstrate a substantial private need or a measurable private or public benefit.
In some instances, with respect to an application to examine an individual file, the public benefit may be clearly apparent on an ex parte showing, or the persons who applied for the order of involuntary hospitalization or the putative patient, already privy to much of the contents, may demonstrate ex parte an individual need and a legitimate reason to open the files. In such cases, the discretion of the court may be soundly exercised on a brief but clear showing without formal notice to others involved in the case. Or, the court may at any time examine court files and records and take judicial notice of their contents. The propriety of each order would in a large measure de[24]*24pend upon who asked for the disclosure and for what purpose.
The present situation, however, differs greatly from situations where an individual connected with a particular case — the patient, or a close relative, for example — wishes to see the file; nor is this a case of the superior court taking judicial notice of its own records and files. To the contrary, this situation involved a wholesale examination of a substantial percentage of current, and presumably active, mental illness files by strangers to all and privy to none of the records which they sought to examine.
No notice whatever was given to anyone who had a direct and viable interest in preserving the privacy of the 189 mental illness files. There were no safeguards set up to preserve anonymity and confidentiality except the self-serving representation of the movants and the terms of the order. The movants did not suggest nor did the court designate a master or referee responsible to the court to assure that individual privacy and confidentiality not only be kept by the researchers but maintained after their findings had been placed in the public domain. The order of November 26th granting an examination of the 189 current mental illness files was entered without any notice to anyone who conceivably would have any justiciable interest in keeping them closed. Except for the representation of anonymity and confidentiality made by the two students and their teacher and the court’s order, there were no safeguards of privacy and confidentiality. Those persons who were parties to or privy to the 189 files would have no way of knowing either that the rights of confidentiality and anonymity granted them by statute had not been breached.
Although the statute directs that the closed files be opened only on court order, it does not specify the conditions necessary for or the kind of notice required for an order opening them; but the question of judicial discretion inevitably arises with the challenging of the order. In some cases, as we have observed, no notice would be necessary [25]*25for the soundness of discretion would be readily apparent in the reasons advanced by the persons seeking the permission. But when complete strangers seek authority to open 189 current and active mental illness files ordered by statute to be kept closed, it amounts to a massive disclosure of the very records which the legislature has ordered closed. The request to open these 189 files invoked the direct and overt exercise of the court’s discretion, and more than a perfunctory showing of need, benefit and freedom from harm was necessary to support the disclosures.
If it is reasonably apparent that parties or their privies to closed court files would in good conscience object to the disclosure of their contents, notice of some kind is required —notice to someone who would officially take a position adversary to the disclosure. Where there is sought a mass disclosure, there should be appointed a master or referee or someone to act on behalf of the court to assure that all promises are kept and that anonymity and confidentiality will be maintained. The statutory right to privacy specially granted by this statute (RCW 71.02.250), even though it represents a diametric departure from the general rule that court records and files are public records and open to inspection at reasonable times and places, should be maintained unless sound and substantial reasons are shown for its abrogation.
Confidentiality and closure of some kinds of judicial files are not unknown. There are several areas of law in which public access to judicial proceedings and records has been curtailed on the theory that privacy and confidentiality clearly outweigh the dangers from closed judicial hearings and proceedings. These areas include hearings and records relating to divorce, adoptions and mental illness and may in some instances with the consent of the accused be applied in criminal cases involving sexual offenses. Depositions containing false, scandalous, libelous and defamatory matters if inadmissible at trial may be ordered closed to protect the good name of innocent persons. By rule of court, disciplinary hearings for members of the bar are closed to [26]*26the public. As long as adequate safeguards are available in each case to avert the dangers of the Star Chamber, these limitations appear to be constitutional. The right of the people to know what is going on in their courts in such cases is considered to be subordinate to the public and individual benefits of privacy.
Accordingly, the discretionary powers of the court are invoked by the statute (RCW 71.02.250) when one seeks to breach the privacy conferred by it. Judicial discretion is a composite of many things, among which are conclusions drawn from objective criteria; it means a sound judgment exercised with regard to what is right under the circumstances and without doing so arbitrarily or capriciously. State ex rel. Clark v. Hogan, 49 Wn.2d 457, 303 P.2d 290 (1956). Where the decision or order of the trial court is a matter of discretion, it will not be disturbed on review except on a clear showing of abuse of discretion, that is, discretion manifestly unreasonable, or exercised on untenable grounds, or for untenable reasons. MacKay v. MacKay, 55 Wn.2d 344, 347 P.2d 1062 (1959); State ex rel. Nielsen v. Superior Court, 7 Wn.2d 562, 110 P.2d 645, 115 P.2d 142 (1941).
Whether this discretion is based on untenable grounds, or is manifestly unreasonable, or is arbitrarily exercised, depends upon the comparative and compelling public or private interests of those affected by the order or decision and the comparative weight of the reasons for and against the decision one way or the other. Had the court denied the application to open the 189 files on the basis of the showing made by the applicants and their proposed modus operandi, there would, we think, have been no manifest abuse of discretion. All the reasons supporting the continued interests of the parties and those in privy with them in the continuing confidentiality, anonymity and privacy of the 189 files in such instance could not be said to have been overcome or outweighed by the declared interests of the professor and his two students, or those of the University of Washington in having them opened to examina[27]*27tion. Conversely, upon the showing made and considering the complete want of notice to anyone who would be required as a matter of law to oppose the entry of such an order and to represent the parties and persons connected with the mental illness files, and the lack of safeguards offered except the self-serving declaration of the examiners to preserve confidentiality and anonymity, the order appears to have been unsupported by adequate reasons or tenable grounds of sufficient weight or merit to overcome the public and private interests in a legislatively assured confidentiality and privacy.
Accordingly, the cause is reversed and remanded with directions to make the temporary injunction permanent.
Hamilton, C.J., Hunter, McGovern, and Stafford, JJ., and Donworth, J. Pro Tern., concur.