Table 2.

Weighted mean effect sizes and distribution of heterogeneity by STEM field.

Basic interest scale	k	N	d	SE	Lower 95%CI	Upper 95%CI	Lower 90%CV	Upper 90%CV	QW	p
Physical Sciences	15	57,669	0.56	0.06	0.43	0.69	0.09	1.03	16.84	0.26
Natural Sciences	6	15,436	0.41	0.11	0.21	0.62	0.17	0.66	1.66	0.89
Biological Science	3	4,500	0.19	0.15	−0.11	0.48	0.10	0.27	0.08	0.96
Medical Science	16	98,919	−0.04	0.06	−0.17	0.08	−0.28	0.20	4.74	0.99
Social Sciences	10	98,022	−0.33	0.08	−0.49	−0.17	−0.63	−0.03	4.62	0.87
Science Technicians	5	23,846	0.14	0.12	−0.09	0.37	0.01	0.27	0.37	0.98
Medical Services	26	193,130	−0.40	0.05	−0.50	−0.30	−0.77	−0.03	18.84	0.80
Engineering	22	355,531	0.83	0.06	0.72	0.94	0.29	1.36	32.88	0.05
Engineering Technicians	8	49,322	0.89	0.10	0.71	1.08	0.64	1.15	2.59	0.92
Mechanics and Electronics	31	255,508	1.21	0.05	1.12	1.30	0.50	1.92	78.15	0.00
Computer Science	1	2,250	0.38	−	−	−	−	−	−	−
Mathematics	9	33,042	0.38	0.09	0.21	0.55	0.17	0.59	1.95	0.98
Applied Mathematics	26	122,826	0.23	0.06	0.11	0.35	−0.07	0.53	7.70	0.94
				Within-field heterogeneity (QW):				170.42 (df = 155)		0.19
				Between-field heterogeneity (QB):				776.45 (df = 12)		0.00
				Total heterogeneity (QT):				946.88 (df = 167)		0.00

k, Number of effect sizes; N, number of respondents; d, inverse variance weighted effect sizes, a positive d-value indicates gender difference favoring men and a negative d-value indicates gender difference favoring women; SE, standard error for d; CI, confidence interval; CV, credibility value; Q, heterogeneity statistic; p, probability of significance value associated with the Q statistic; bolded confidence intervals and credibility values indicate that 0 is not included within the interval; bolded Q statistic and corresponding p-value indicate that there was significant total heterogeneity between studies and significant heterogeneity among the effect sizes across STEM fields.