SMITH, Judge.
Johnny "Tico" Flowers was indicted on two counts of child molestation, OCGA § 16-6-4(a), three counts of aggravated child molestation, OCGA § 16-6-4(c), one count of incest, OCGA § 16-6-22, and two counts of sodomy, OCGA § 16-6-2. He was convicted of three counts of sexual battery, one count of fornication, and three counts of aggravated child molestation. (This trial was the second trial, the first ending in a mistrial due to a hung jury.) His motion for new trial was denied, and he appeals.
1. Flowers contends the evidence was insufficient to enable the jury to convict him of the crimes charged. We disagree. Construed to support the verdict, evidence was presented that when J.R., the victim and Flowers' stepdaughter, was around age ten, Flowers rubbed her "bottom," breasts, and vagina, an act that occurred frequently over the next years, both before and after J.R. reached the age of fourteen. J.R. testified that vaginal intercourse began when she was around age eleven and continued until after she reached age fourteen, and that anal intercourse and sodomy with Flowers began when she was thirteen or fourteen and continued until after age fourteen.
While J.R. admitted she did not report the alleged incidents, either at home, school, or church, until April 1992, some time after the alleged events occurred, her delay in reporting the incidents affects only her credibility. Similarly, testimony of the physician who examined J.R. that he found no pelvic abnormalities or evidence of scarring or tearing around the vagina or rectum and that J.R. had been "sexually active" affects J.R.'s credibility. Although Flowers challenges J.R.'s credibility on appeal, "the weight and credibility of witnesses are questions for the triers of fact; that some evidence offered by a witness seems contradictory to his own or to some other's, or incomplete or uncertain, does not automatically discredit the evidence given by that witness for it is the function of the triers of fact to determine to what evidence [they give] credence. It is not for us to determine or question how the jury resolved any apparent conflicts or uncertainties in the evidence." (Citations and punctuation omitted.) Royal v. State, 217 Ga. App. 459, 460 (1) ( 458 S.E.2d 366) (1995). As in Roberson v. State, 214 Ga. App. 208, ( 447 S.E.2d 640) (1994), the evidence adduced at trial, though not overwhelming, was sufficient to authorize a rational trier of fact to find Flowers guilty beyond a reasonable doubt of the offenses charged. Jackson v. Virginia, 443 U.S. 307 (99 SC 2781, 61 L.Ed.2d 560) (1979).
2. While we find sufficient evidence existed to enable a rational trier of fact to find Flowers guilty beyond a reasonable doubt under the standard of Jackson v. Virginia, we find the trial court erroneously admitted expert testimony that improperly bolstered the victim's testimony. We therefore must reverse.
One of the State's witnesses, a former child and adolescent counselor, described the "credibility enhancement technique" used to substantiate allegations of sexual abuse. She testified that a determination regarding the truthfulness of an alleged abuse victim depended on whether she observed the presence of five criteria as a result of interviewing the victim: (1) evidence that multiple sexual incidents had occurred over time; (2) observations that a progression of sexual activities had occurred; (3) observations that the incidents were kept secret; (4) observations that coercion was involved with the incidents; and (5) provision by the alleged victim of explicit details of sexual behavior. She stated, "If an allegation meets all five of the criteria, then we say that meets all of the information that we have that says, yes, sexual abuse did occur." She then described her observations regarding each of the criteria. Although she did not directly state she believed J.R. to have been truthful, the witness did testify that all five criteria were met by J.R. The witness's testimony thus established that she believed J.R. to have been telling the truth. A witness's credibility cannot be bolstered by another's testimony that the witness is telling the truth. "An expert witness may not testify as to his opinion of an ultimate issue of fact unless the inference to be drawn from the evidence is beyond the ken of the jurors. Credibility of a witness is not beyond the ken of the jurors but, to the contrary, is a matter solely within the province of the jury. OCGA § 24-9-80. An expert witness may not testify as to his opinion of the victim's truthfulness." (Citations and punctuation omitted.) Roberson v. State, 214 Ga. App. 208, 210 (4) ( 447 S.E.2d 640) (1994). See also Smith v. State, 259 Ga. 135, 138 (2) ( 377 S.E.2d 158) (1989). Because the essence of the expert's testimony was that she believed J.R. to be telling the truth, her testimony was impermissible.
We recognize that in Stamey v. State, 194 Ga. App. 305 ( 390 S.E.2d 409) (1990), we found testimony regarding "credibility patterns" of a young sexual abuse victim to be "offensive" but not "a significant addition to [the expert's] main testimony, so as to displace the jury's minds on the issue and usurp their authority." Id. at 306. Stamey, however, was a decision by a single three-judge division of this court with two of those judges concurring specially. For that reason, it is a physical precedent only, and we are not bound by it. Court of Appeals Rule 33(a). Also, this case differs in a substantive way from Stamey. In Stamey, the evidence against the defendant was overwhelming. See also Moss v. State, 216 Ga. App. 711, 713-714 ( 455 S.E.2d 411) (1995) (challenged testimony, even if objectionable, would not have changed guilty verdict.) Here, as noted in Division 1, the evidence against Flowers, like that in Roberson, "was not overwhelming and credibility of the witnesses was a key issue in the case." 214 Ga. App. at 210. Moreover, unlike Stamey, testimony regarding the "credibility enhancement technique" was not merely an insignificant addition to the expert's main testimony as to J.R.'s credibility but was a major focus of her testimony. The trial court erred in admitting evidence of the "credibility enhancement technique" and in denying Flowers' motion for new trial on this basis.
3. Because other errors enumerated by Flowers may recur on retrial, we address them here. Flowers was not present at the hearing on admission of similar transactions, and his trial counsel stated at the hearing, "I'll waive his presence." The trial court made no further inquiry about Flowers' absence. Because a similar transactions hearing may be evidentiary, Flowers's presence will be required, unless Flowers himself expressly waives his presence at the hearing. See generally McGinnis v. State, 208 Ga. App. 354, 357 (4) ( 430 S.E.2d 618) (1993).
We make no ruling here whether the alleged similar transactions are admissible, as that determination depends on the evidence adduced at the hearing conducted by the trial court in accordance with Uniform Superior Court Rule 31.3 and Williams v. State, 261 Ga. 640 ( 409 S.E.2d 649) (1991). But with regard to Flowers's contention about the availability of a child witness, if the trial court determines similar transaction evidence is admissible, we note that "a child witness is `available' for purposes of the Child Hearsay Statute as long as the child is physically available to appear at trial. [Cits.]" Gibby v. State, 213 Ga. App. 20, 22 (2)(d) ( 443 S.E.2d 852) (1994).
4. Flowers contends a videotape of J.R.'s statement was erroneously admitted under the Child Hearsay Statute, OCGA § 24-3-16. It is undisputed that J.R. was 16 when she made the statement and that the Child Hearsay Statute applies to statements made by a child under 14, provided certain criteria are met. Thus, the statute is inapplicable. Without ruling on the admissibility of the tape, we note that hearsay concerns about the videotape may be satisfied if J.R. is under oath and subject to cross-examination regarding her statement. See Cuzzort v. State, 254 Ga. 745 ( 334 S.E.2d 661) (1985).
5. Flowers complains of the trial court's refusal to admit testimony regarding sexual conduct of the victim "which would have presented an alternative explanation . . . that there was sexual penetration." Such evidence is inadmissible under OCGA § 24-2-3, unless the evidence falls within the narrow confines of subsection (c) of that provision.
6. Flowers complains the trial court failed to properly recharge the jury after the jury asked for "clarification of lesser charges, sexual battery and fornication." The court recharged the jury that a lesser included offense of child molestation and incest was fornication and defined the offense of fornication. The court also charged that a lesser included offense of all counts was sexual battery and defined sexual battery. This charge was incorrect. Sexual battery is not a lesser included offense of child molestation. Shepherd v. State, 217 Ga. App. 893 ( 459 S.E.2d 608) (1995) (but see special concurrences arguing that sexual battery is a lesser included offense of child molestation). The charge should not be given upon retrial. See also Perkins v. State, 212 Ga. App. 225, 227 ( 441 S.E.2d 511) (1994); Duck v. State, 210 Ga. App. 205, 207-208 (4) ( 435 S.E.2d 725) (1993).
7. Flowers contends the State failed to prove that the crimes occurred within the applicable statutes of limitations, that the trial court entered a conviction despite this failure of proof, and that the trial court erroneously failed to charge on the applicable statutes of limitation. On retrial, it will be the State's burden to prove the charged crimes occurred within the applicable limitations periods. If the evidence raises statute of limitations issues, the trial court should charge the applicable law regarding the appropriate limitations periods. See generally Blankenship v. West Ga. Plumbing Supply, 213 Ga. App. 275, 277 ( 444 S.E.2d 596) (1994): "It is the duty of the trial court to charge the jury on the law applicable to the issues where there is any evidence on which to predicate the instructions." (Citations and punctuation omitted.)
8. Flowers's contentions regarding effectiveness of counsel are moot in light of our holding in Division 2.
Judgment reversed. Birdsong, P.J., and Johnson, J., concur.
SMITH, Judge.
DECIDED FEBRUARY 20, 1996 — RECONSIDERATION DENIED MARCH 26, 1996 — CERT. APPLIED FOR.