Table 1.

Summary statistics of the difference between T2 (before the scan session) and T0 (baseline) for the behavioral assessment in each tryptophan intervention

Test	ATD	ATD–BAL	BAL	BAL–ATL	ATL	ATD–ATL	Main effects
	Mean (SD)	p‐value	Mean (SD)	p‐value	Mean (SD)	p‐value	p‐value
STAI‐G X1‐state	1.12 (5.00)	0.85	1.36 (5.40)	0.80	1.61 (4.11)	0.62	0.88
KSS	1.41 (2.08)	0.27	1.17 (1.96)	0.006*	1.86 (2.13)	0.19	0.04*
VAS‐heightened (mm)	−6.83 (24.83)	0.94	−7.03 (24.56)	0.31	−3.64 (17.56)	0.35	0.52
VAS‐excited (mm)	−9.32 (28.92)	0.23	−5.01 (19.41)	0.43	−8.03 (23.52)	0.68	0.49
VAS‐balanced (mm)	−0.44 (28.33)	0.74	−1.80 (24.25)	0.40	−5.69 (30.81)	0.25	0.49
VAS‐depressed (mm)	2.04 (16.63)	0.06	7.05 (21.80)	0.32	4.07 (16.36)	0.28	0.14
VAS‐lethargic (mm)	14.02 (28.41)	0.52	11.15 (27.61)	0.28	16.04 (29.43)	0.65	0.55
VAS‐activated (mm)	−10.68 (22.15)	0.70	−9.38 (19.06)	0.63	−11.08 (24.43)	0.91	0.87
VAS‐sad (mm)	3.55 (13.52)	0.30	1.41 (13.30)	0.62	2.68 (18.31)	0.55	0.55
VAS‐relaxed (mm)	−6.20 (21.79)	0.37	−3.79 (24.80)	0.02*	−12.74 (26.46)	0.12	0.06
VAS‐stressed (mm)	−1.80 (13.54)	0.03*	5.52 (24.12)	0.48	3.73 (15.83)	0.01*	0.04*
PDGlogk	0.37 (0.85)	1.00	0.31 (1.04)	1.00	0.23 (0.82)	0.51	0.38
PDLlogk	−0.15 (0.99)	0.28	−0.38 (1.25)	0.35	−0.33 (1.52)	0.63	0.34
MGλ	143 (0.98)	1.00	1.48 (1.13)	1.00	1.44 (1.13)	1.00	0.89

None of the comparisons survived Bonferroni correction for 14 tests. Asterisks indicate ps < 0.05, uncorrected for multiple comparisons.

N = 82–85.

STAI‐G X1, state–trait anxiety inventory–state, scale X1; KSS, Karolinska sleepiness scale; VAS, visual analogue scale, mm, millimeters; PDG, probability discounting gains (k on log scale); PDL, probability discounting losses (k on log scale); MG, mixed gambles (lambda).