Table 1.

Exclusions and participant demographics by experiment.

	Pilot		Experiment 1		Experiment 2
	n	%	n	%	n	%
Nonparticipants	225		106		269
Ineligible	222	99	105	99	260	97
Duplicate	3	1	1	1	9	3
All participants	315		272		669
Incomplete	21	7	30	11	78	12
Listed no friends	10	3	9	3	27	4
Withdrew consent	4	1	1	< 1	11	2
Final sample	280		232		553
Mean age (years)	20		20		20
Participant type
Men in STEM majors	123	44	123	53	240	43
Women in STEM majors	44	16	50	22	117	21
Women in non-STEM majors	113	40	59	25	196	35
Participant race
White	160	57	140	60	334	60
East Asian	120	43	92	40	219	40
Experimental condition
STEM-stereotypic profile	141	50	116	50	265	48
Feminine-stereotypic profile	139	50	116	50	288	52

Note. Ineligible individuals were redirected automatically out of the survey. Duplicate submissions (from the same person) within each experiment were omitted. Among the eligible, unique participants, analyses excluded submissions that were incomplete (missing all friendship intentions data), listed no friends (with no friends, some questions had invalid response options), or withdrew consent (after debriefing). Across studies and in descending order, participants came from the following STEM majors (with ⩽ 20% female enrollment): engineering (mechatronics, software, nanotechnology, mechanical, computer), computer science, electrical engineering, physics, and pure math; and non-STEM majors (with ⩾ 65% female enrollment): psychology; social development; health; English; sexuality, marriage, and family; fine arts; environment and resources; recreation and leisure; pharmacy; sociology; peace and conflict; speech communication; recreation and business; French; international development; optometry; and anthropology. In Experiment 1, 25 non-STEM men participated to be a third control group, but were excluded prior to analysis due to low number (22, applying exclusion criteria).