The opinion of the court was delivered by
Daniel Reser appeals his jury convictions of five counts of rape, K.S.A. 1987 Supp. 21-3502, and three counts of aggravated criminal sodomy, K.S.A. 1987 Supp. 21-3506. Reser was sentenced to concurrent terms of imprisonment of five to twenty years on each count.
The victim was 14 years old on the morning of June 15, 1987. Her stepfather, Daniel Reser, came into her bedroom after her mother had gone to work. Reser awakened his stepdaughter by tearing aside her blankets and her nightclothes. He then raped her.
On the afternoon of June 20, the victim was on the phone with a classmate when the classmate heard her repeatedly asking Reser “to stop.” The victim then hung up, ashamed because Reser was undressing her as she talked. Reser then threw the victim on the floor and raped and sodomized her.
*307 On the morning of July 4, the victim was in bed asleep. There were guests staying in the house over the holiday, so the victim shared her bed with a 4-year-old boy. At about 7:00 a.m. Reser entered the victim’s bedroom. He played with her breasts, put his hand inside her clothes, and put his finger in her anus. Although the victim could hear people talking downstairs, she testified she did not cry out because she did not want her mother and the little boy’s mother to have to find out what Reser was doing to her. The little boy remained asleep throughout this incident.
On July 6, Reser raped the victim while she was alone at home. On another morning a few days before the victim went to cheerleading camp on July 20, Reser raped and sodomized her while her mother was at work. Reser again raped his stepdaughter on the morning of July 24, just after she returned from camp.
After the first incident, the victim began staying away from home with friends and relatives as often as she could to avoid Reser. On August 1, the victim’s mother found a note from her daughter stating she was going to live with her sister. The mother went to where the victim worked and told her she must remain at home. She asked what the problem was and the victim started crying and said, “Mom, you don’t want to know.” The mother asked the victim if Reser had “gotten fresh” with her. She asked this because Reser had once told her he was sexually aroused by the victim. The victim finally told her mother of Reser’s actions.
When confronted by his wife, Reser denied anything had happened. He then left the house and went to the police station to talk to his good friend, Ronald Dean, the town’s chief of police. After a casual conversation, Reser began talking about how the victim had “become wild.” He said he could see her while she bathed when he stood outside and looked through the window curtains. Reser ultimately told Dean he had had sexual intercourse with the victim. At trial, Reser acknowledged talking to his friend on August 1 but denied stating he had had sexual intercourse with the victim.
Helen Swan, a licensed social worker, testified for the State. Swan evaluated the victim on two different dates for a total of about four hours. She told the court she diagnosed the victim as suffering from post-traumatic stress disorder.
*308 The defense objected, claiming Swan did not qualify as an expert qualified to diagnose or testify concerning post-traumatic stress syndrome. The trial court found Swan qualified as an expert after hearing her qualifications and the proposed testimony outside the presence of the jury.
Swan is not a psychologist or psychiatrist. She is an international expert on the subject of child abuse. She is licensed as a clinical specialist in Kansas and has a master’s degree in social work from the University of Kansas. She has had twelve years of experience in the area of mental health: the first seven with the Johnson County Mental Health Center, and the last five in private practice specializing in child abuse cases. She has worked with over 200 cases of abuse. She has qualified as an expert witness in sexual abuse cases in Nebraska, Missouri, and Oklahoma as well as Kansas. She has been recognized on two separate occasions by the governor’s conference in Kansas for her work and has received an award from the National Committee for the Prevention of Child Abuse, which is given to one person in the nation each year. She has published books and articles on the subject and has recently presented papers at international conferences on child abuse in Montreal, Amsterdam, and Paris. Swan is listed as an expert in child sexual abuse cases in the prosecutor’s manual for child sexual abuse cases published in 1985 by the Kansas Bar Association.
Swan did not use the term post-traumatic stress syndrome before the jury, but testified that children who are sexually abused tend to report fairly consistent symptoms or common patterns of behavior resulting from the trauma. She noted children seldom report sexual abuse immediately, “particularly within family situations.” The great majority “tend to keep it inside because they think it will go away or they don’t want to embarrass people or they don’t want to embarrass themselves.”
Swan testified she had sufficient data to form an opinion as to whether the victim showed symptoms consistent with sexual abuse. She was of the opinion the victim exhibited behavior consistent with a child who had been sexually abused.
While the briefs of both parties leave the impression Swan testified the victim suffered from post-traumatic stress syndrome or rape trauma syndrome, that did not occur. The record is clear that Swan testified only as to traits and patterns common to *309 victims of sexual child abuse and that the victim exhibited some of these traits. She did not go into an explanation of the post-traumatic stress syndrome, nor did she try to narrow it to rape trauma syndrome.
The first issue on appeal is whether Swan’s testimony was inadmissible because Reser did not claim consent as a defense. Kansas cases so far have allowed expert testimony on characteristics shown by rape victims only where the defense is consent. Reser’s sole defense was that he was not present when the offenses were alleged to have taken place. He made no attempt to show his stepdaughter was not the victim of sexual abuse. Reser’s defense did, however, necessarily imply the victim lied when she identified him as her assailant.
It is fundamental that in order for expert testimony to be admitted into evidence at trial it must be helpful to the jury.
State v. Hodges,
The second issue is whether there was adequate foundation to qualify Swan as an expert. The defense argues there was no showing Swan was qualified to diagnose symptoms consistent with child abuse or that the basis for her conclusions were accepted within her field of social work or within the fields of psychology or psychiatry.
Before an expert opinion may be received in evidence at trial, the basis of that opinion must be shown to be generally accepted as reliable within the expert’s particular field.
State v. Marks,
The basis for admission of expert testimony is necessity, aris
*310
ing out of particular circumstances of a case where the normal experience of jurors needs augmentation to help them draw proper conclusions from the facts.
State v. Hodges,
Whether a particular witness possesses the knowledge and experience to aid the jury and to testify as an expert concerning a material matter rests within the sound discretion of the trial court.
State v. Marks,
In
State v. Marks,
Marks
was reaffirmed by a divided court in
State v. McQuillen,
In
McQuillen,
we discussed three opinions which refused to allow expert testimony on rape trauma syndrome. In
People v. Bledsoe,
In
State v.
Taylor,
Finally, in
State v. Saldana,
The Supreme Court of Minnesota distinguishes between admission of expert testimony on characteristics of sexual abuse for competent adults and for children. In
State v. Myers,
In
State v. Bressman,
In
State v. Lash,
In
State v.
Jackson,
We again heard the
McQuillen
case after retrial in
State v. McQuillen,
In the case at bar, the defense relies on
State v. Black,
The instant case differs from Black in that here, the witness merely testified as to characteristics common to children who had been sexually abused and gave her opinion that the victim in this case exhibited some of these characteristics. In Black, the witness exceeded the diagnostic abilities accepted in her field by specifying that the victim had been sexually abused by anal intercourse with a male adult the victim trusted.
There are numerous cases from other jurisdictions where expert testimony regarding characteristics of sexually abused children has been held properly admitted as providing helpful background information to the jury.
In
Rodriquez v. State,
In
Poyner v. State,
In
Kruse v. State,
In
State v. Le Brun,
In
State v. Radjenovich,
*315
Finally, in
People v. Hampton,
In
State v. Bishop,
After a careful review of the foregoing cases, we conclude that Helen Swan, who is licensed as a clinical specialist, with a master’s degree in social work, years of experience in the field of child sexual abuse and with world-wide recognition in the field of child sexual abuse, is eminently qualified as an expert to testify as to common patterns of behavior resulting from child sexual abuse and that this victim had symptoms consistent with those patterns.
Tfle final issue is whether the trial court erred in failing to give PIK Crim. 2d 51.07 at the request of the defendant. The instruction provides: “You must consider this case without favoritism or sympathy for or against either party. Neither sympathy nor prejudice should influence you.” The committee on pattern jury instructions recommends this instruction not be given unless there are very unusual circumstances, and suggests that PIK Crim. 2d 52.09 is ordinarily a sufficient guide for the jury. PIK Crim. 2d 52.09 was given. It provides: “It is for you to determine the weight and credit to be given the testimony of each witness. You have a right to use common knowledge and experience in regard to the matter about which a witness has testified.” The committee explains that PIK Crim. 2d 51.07 is normally objectionable in that, rather than telling the jury what to do, it tells it
*316
what not to do. We concurred with the committee’s recommendation in
State v. Sully,
The defense claims we may not base our decision on the fact the instruction tells the jury what not to consider because the court gave the jury PIK Crim. 2d 51.04, 51.05, and 51.06, all of which include statements explaining to the jury what it must not do. The committee suggests that PIK Crim. 2d 51.05 be given in ordinary cases. This instruction merely states that the jury must not concern itself with the reasons for evidentiary rulings. PIK Crim. 2d 51.04 requires the jury to disregard testimony not admitted into evidence, and PIK Crim. 2d 51.06 requires the jury to disregard statements which are not supported by evidence. These are standard instructions and are firmly rooted in the law.
The defense argues PIK Crim. 2d 51.07 is necessary because the jury was necessarily prejudiced by the disparity between the victim and the defendant. The victim was a 14-year-old high school girl, a cheerleader, and president of her class. The defendant was her 250 pound, 39-year-old stepfather. The incidents occurred in a small community in which it was likely the jurors were acquainted with both the victim and the defendant. The State notes the defendant was steadily employed, married, and had a large number of friends who testified in his behalf. No evidence of prior criminal acts was presented to the jury. There was no media coverage of the charges. The victim was not physically injured.
The defense attempts to analogize the instant case to
State v. Rhone,
We have never held a trial court in error for refusing to give PIK Crim. 2d 51.07. The circumstances in which the trial court in Rhone did give the instruction were unusual. The circumstances of the instant case are not unusual in the criminal courts. The issue is without merit.
The judgment of the trial court is affirmed..
