Table 1.

Descriptive statistics of total scores for the questionnaires (N = 855, survey)

Questionnaire	Sex	Mean	SD	Min	Median	Max
HK11	Female	24.05	6.72	11	23	48
	Male	24.03	6.72	11	23	49
	Total	24.04	6.71	11	23	49
PI20	Female	48.33	13.00	26	46	89
	Male	47.49	12.70	24	46	85
	Total	47.91	12.85	24	46	89

A higher score indicates lower self-reported face recognition skills. Note that females and males showed similar total scores in terms of not only summary statistics, but also distribution, as shown in Fig. 1