Table 3.

Number of participants and age range in aging studies

Reference	Number of participants	Age range in years or mean age ± SD
Serotonergic and dopaminergic neuromodulation during aging
Antonini et al.48	32	21–68
Erixon-Lindroth et al.44	12	34–81
Costes et al.38	53	19–70
Hesse et al.39	22	18–83
Inoue et al.37	27	21–82
Kaasinen & Rinne49	24	19–72
Kuikka et al.40	19	22–74
Moeller et al.51	19	23–73
Mozley et al.45	66	41.1
Newberg et al.41	13	22–56
Pirker et al.42	16	21–60
Suhara et al.46	17	20–72
Wang et al.47	21	22–74
Wong et al.35	44	19–76
Yamamoto et al.43	28	20–79
Learning and decision making during aging
Denburg et al.118	80	26–55; 56–85
Dreher et al.72	13	66 ± 5
	20	25 ± 3.7
Eppinger et al.67	18	20.8
	18	68.5
Eppinger et al.68	17	10–12
	18	19–24
Frank & Kong111	44	60–83
Hämmerer et al.66	44	10–12
	45	13–14
	46	20–30
	44	65–75
Mell et al.73	14	26.48 ± 3.96
	14	67.82 ± 5.01
Pietschmann et al.69	18	23.7
	25	66.1
Samanez–Larkin et al.115	12	19–27
	12	65–81
Schott et al.71	19	62–78
	18	19–28
Simon et al.112	17	18.9
	24	70.3
Weiler et al.100	30	19–33
	30	50–71
Wood et al.117	88	18–34
	67	65–88