es_from_pt_bis_r_pval function

Convert a p-value of a point-biserial correlation coefficient into several effect size measures

es_from_pt_bis_r_pval(
  pt_bis_r_pval,
  n_exp,
  n_nexp,
  smd_to_cor = "viechtbauer",
  reverse_pt_bis_r_pval
)

Arguments

• pt_bis_r_pval: p-value of a point-biserial correlation coefficient
• n_exp: total number of participants in the exposed group
• n_nexp: total number of participants in the non exposed group
• smd_to_cor: formula used to convert the pt_bis_r_pval value into a coefficient correlation.
• reverse_pt_bis_r_pval: a logical value indicating whether the direction of the generated effect sizes should be flipped.

Returns

This function estimates and converts between several effect size measures.

natural effect size measure	D + G
converted effect size measure	OR + R + Z
required input data	See 'Section 11. ANOVA statistics, Student's t-test, or point-bis correlation'
	https://metaconvert.org/input.html

Details

This function converts the p-value of a point biserial correlation into a Student's t-value.

The formula used to obtain this Student's t-value is :

$$t = pt(\frac{pt\_bis\_r\_pval}{2}, df = n\_exp + n\_nexp - 2)$$

Calculations of the es_from_student_t function are then applied.

Examples

es_from_pt_bis_r_pval(pt_bis_r_pval = 0.2, n_exp = 121, n_nexp = 121)

References

Lipsey, M. W., & Wilson, D. B. (2001). Practical meta-analysis. Sage Publications, Inc.