Relationship between Second to Fourth Digit Ratio (2D:4D), Systemization and Empathy in Asholio Ethnic Group of Kaduna State, Nigeria

The ratio of 2nd to 4th digit length (2D:4D), systemizing quotient (SQ) and empathizing quotient (EQ) are commonly put forth as correlates of prenatal testosterone. This present study investigated the relationship between (2D:4D), systemizing quotient (SQ) and empathizing quotient (EQ) of Asholio ethnic group in Kaduna state. Digit lengths of the second and fourth fingers were directly measured from the proximal crease to the tip of the finger using vernier caliper. SQ and EQ were assessed in 300 participants of the ethnic group containing both males and females. All participants consented to the study. SQ and EQ were assessed in 300 participants of the ethnic group consisting of both males and females, using a questionnaire of 120 questions. Digit lengths of the second and fourth fingers were directly measured from the proximal crease to the tip of the finger using vernier caliper. The figures for 2D and 4D were obtained were computed by dividing 2D by 4D. In order to establish the repeatability of measurements taken, each finger of both hands was measured twice. Data were expressed as mean ± SD, Pearson correlation was used to assess any association. P value was set at P < 0.05 using Statistical Package for Social Sciences (SPSS) version 20. Questionnaires administered had ethical approval obtained from the university ethical approval committee. Data were expressed as mean ± SD and association checked using Pearson correlation, P value set at < 0.05 using SPSS version 20. Digit ratio was found to be significantly lower in males than females Significant negative correlations exist between. SQ and 2D:4D and this being stronger for right hand 2D:4D (right r = -0.47, left; r = -0.32, P < 0.05). Generated predictive equation is stronger on the right hand. This study has demonstrated the association between 2D:4D, SQ and EQ. SQ could be predicted most especially from the right hand.

Key Words: 2D:4D, Systemizing, Empathizing and Asholio