2D:4D Finger Ratio

The ratio of the lengths of the index finger to the ring finger in 46 males and the number of CAG repeats for each.

Usage

FingerRatio

Format

A data frame with 46 observations on the following 2 variables.

CAGrepeats

a numeric vector of the number of CAG repeats

finger.ratio

a numeric vector of the ratio of digit 2 to digit 4

Source

inferred from Manning, J.T., P.E. Bundred, D.J. Newton, and B.F. Flanagan. 2003. The second to fourth digit ratio and variation in the androgen receptor gene. Evolution and Human Behavior 24: 399-405.

References

http://en.wikipedia.org/wiki/Digit_ratio

Examples

str(FingerRatio)
#> 'data.frame':	46 obs. of  2 variables:
#>  $ CAGrepeats  : int  21 22 25 19 20 18 19 19 19 20 ...
#>  $ finger.ratio: num  1.06 1.06 1.06 1.03 1.03 ...
xyplot(finger.ratio ~ CAGrepeats, FingerRatio,
  xlab = "Number of CAG Repeats",
  ylab = "2D:4D Ratio"
)