Development and revision of the nonverbal ability test for identifying gifted programs in Türkiye(BNV-II)

The present study aims to develop the Bildiren Nonverbal Ability Test, Second Version (BNV-II), intended for the identification of gifted children at the primary school level. The first version of the test was originally created as a paper-and-pencil assessment. However, to reduce the risk of individuals becoming overly familiar with the test items due to repeated annual administration without modifications, the BNV-II was revised into a digital format for tablet use, incorporating updated items. In the initial phase of the study, the test was constructed in two forms, A and B, and administered to a pilot sample of 1,360 children aged 6–10 years old, drawn from various locations across Türkiye. The final version of the test was determined through an item difficulty, item discrimination, and item-total score correlation analysis. A norming study was subsequently conducted, involving a total of 6,567 children in Türkiye. The sample for Form A comprised 1,560 females (48%) and 1,659 males (52%), while Form B included 1,628 females (49%) and 1,720 males (51%). Reliability was assessed using test-retest, split-half, KR-20, and KR-21 methods, with standard error, standard deviation, and reliability coefficients calculated. Content, construct, and criterion-related validity were evaluated. The KR-20 reliability coefficient was 0.92 for both forms, and test-retest reliability was 0.91. Parallel-form reliability was 0.86, while correlations between BNV-II total scores and those of NNAT-I, TONI-3, and RSPM were 0.85, 0.86, and 0.77, respectively. These results confirm the BNV-II as a reliable and valid tool for identifying gifted children in Türkiye. © 2025 Informa UK Limited, trading as Taylor & Francis Group.