title: Reliability and validity of the new Tanaka B Intelligence Scale scores: a group intelligence test.
abstract: OBJECTIVE
  The present study evaluated the reliability and concurrent validity of the new Tanaka B Intelligence Scale, which is an intelligence test that can be administered on groups within a short period of time.
  
  
  METHODS
  The new Tanaka B Intelligence Scale and Wechsler Intelligence Scale for Children-Third Edition were administered to 81 subjects (mean age ± SD 15.2 ± 0.7 years) residing in a juvenile detention home; reliability was assessed using Cronbach's alpha coefficient, and concurrent validity was assessed using the one-way analysis of variance intraclass correlation coefficient. Moreover, receiver operating characteristic analysis for screening for individuals who have a deficit in intellectual function (an FIQ<70) was performed. In addition, stratum-specific likelihood ratios for detection of intellectual disability were calculated.
  
  
  RESULTS
  The Cronbach's alpha for the new Tanaka B Intelligence Scale IQ (BIQ) was 0.86, and the intraclass correlation coefficient with FIQ was 0.83. Receiver operating characteristic analysis demonstrated an area under the curve of 0.89 (95% CI: 0.85-0.96). In addition, the stratum-specific likelihood ratio for the BIQ≤65 stratum was 13.8 (95% CI: 3.9-48.9), and the stratum-specific likelihood ratio for the BIQ≥76 stratum was 0.1 (95% CI: 0.03-0.4). Thus, intellectual disability could be ruled out or determined.
  
  
  CONCLUSIONS
  The present results demonstrated that the new Tanaka B Intelligence Scale score had high reliability and concurrent validity with the Wechsler Intelligence Scale for Children-Third Edition score. Moreover, the post-test probability for the BIQ could be calculated when screening for individuals who have a deficit in intellectual function. The new Tanaka B Intelligence Test is convenient and can be administered within a variety of settings. This enables evaluation of intellectual development even in settings where performing intelligence tests have previously been difficult.
authors.affiliation: Department of Child and Adolescent Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan.
authors.forename: Yota
authors.initials: Y
authors.lastname: Uno
authors.affiliation: Department of Psychology, Chiba Juvenile Detention Home, Chiba, Japan.
authors.forename: Hitomi
authors.initials: H
authors.lastname: Mizukami
authors.affiliation: Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Ando
authors.affiliation: Department of Psychology, Kyoto Gakuen University, Kyoto, Japan.
authors.forename: Ryoji
authors.initials: R
authors.lastname: Yukihiro
authors.affiliation: Department of Psychology, Saitama Juvenile Detention Home, Saitama, Japan.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Iwasaki
authors.affiliation: Department of Child and Adolescent Psychiatry, Nagoya University Graduate School of Medicine, Nagoya, Japan.
authors.forename: Norio
authors.initials: N
authors.lastname: Ozaki
mesh_terms: D000293:Adolescent; D019540:Area Under Curve; D057237:Criminals / Q000523:psychology*; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis* / Q000523:psychology; D007361:Intelligence Tests / Q000706:statistics & numerical data*; D007564:Japan; D008297:Male; D037141:Mandatory Programs / Q000941:ethics / Q000331:legislation & jurisprudence; D012372:ROC Curve