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Table 2 Inferential statistics and effect sizes for the group comparisons

From: Autistic traits, systemising, empathising, and theory of mind in transgender and non-binary adults

Comparison

Measure and control study

Direction of Effect

t

p

Cohen’s d

95% CI for d

Transgender men vs. control females

AQ (vs. Baron-Cohen et al.) [34]

Transgender men > control females

5.54

< 0.001

0.77

[0.53, 1.00]

 

AQ (vs. Ruzich et al.) [35]

Transgender men > control females

3.80

< 0.001

0.47

[0.24, 0.70]

 

SQ-Short [31]

Transgender men > control females

4.88

< 0.001

0.62

[0.38, 0.86]

 

EQ-Short [31]

Transgender men < control females

− 4.58

< 0.001

− 0.70

[− 0.94, − 0.46]

 

EQ-10 [32]

Transgender men < control females

− 3.93

< 0.001

− 0.50

[− 0.73, − 0.25]

 

Eyes Test [36]

Transgender men < control females

− 2.29

0.025

− 0.36

[− 0.59, − 0.13]

Non-binary AFAB  vs. control females

AQ (vs. Baron-Cohen et al.) [34]

Non-binary AFAB > control females

11.16

< 0.001

1.24

[1.03, 1.44]

 

AQ ( vs. Ruzich et al.) [35]

Non-binary AFAB > control females

8.98

< 0.001

0.89

[0.69, 1.09]

 

SQ-Short [31]

Non-binary AFAB > control females

5.90

< 0.001

0.66

[0.45, 0.87]

 

EQ-Short [31]

Non-binary AFAB < control females

− 5.98

< 0.001

− 0.76

[− 0.97, − 0.55]

 

EQ-10 [32]

Non-binary AFAB < control females

− 4.86

< 0.001

− 0.51

[− 0.71, − 0.31]

 

Eyes Test [36]

Non-binary AFAB < control females

− 2.72

0.008

− 0.32

[− 0.51, − 0.12]

Transgender women  vs. control males

AQ (vs. Baron-Cohen et al.) [34]

Transgender women > control males

0.84

0.993

0.01

[− 0.20, 0.22]

 

AQ (vs. Ruzich et al.) [35]

Transgender women < control males

− 1.44

0.152

− 0.13

[− 0.34, 0.07]

 

SQ-Short [31]

Transgender women < control males

− 0.43

0.666

− 0.05

[− 0.27, 0.17]

 

EQ-Short [31]

Transgender women > control males

3.22

0.002

0.38

[0.16, 0.60]

 

EQ-10 [32]

Transgender women > control males

3.21

0.002

0.34

[0.14, 0.55]

 

Eyes Test [36]

Transgender women < control males

− 2.27

0.026

− 0.22

[− 0.42, − 0.02]

Non-binary AMAB  vs. control males

AQ (vs. Baron-Cohen et al.) [34]

Non-binary AMAB > control males

1.67

0.102

0.22

[− 0.07, 0.51]

 

AQ (vs. Ruzich et al.) [35]

Non-binary AMAB > control males

0.44

0.661

0.05

[− 0.23, 0.33]

 

SQ-Short [31]

Non-binary AMAB < control males

− 0.88

0.384

− 0.13

[− 0.43, 0.16]

 

EQ-Short [31]

Non-binary AMAB > control males

1.83

0.074

0.29

[− 0.00, 0.59]

 

EQ-10 [32]

Non-binary AMAB > control males

2.27

0.028

0.30

[0.02, 0.59]

 

Eyes Test [36]

Non-binary AMAB < control males

− 0.21

0.832

− 0.03

[− 0.31, 0.24]

  1. AFAB = individuals assigned female at birth; AMAB = individuals assigned male at birth