Enhanced Intensity Dependence as a Marker of Low Serotonergic Neurotransmission in High Optimistic College Students

Table 1

Characteristics of the optimism and pessimism group.

	Optimism (𝑛=24); (M ± SD)	Pessimism (𝑛=24); (M ± SD)	𝜒^2	t value	P value
Gender (m/f)	10/14	14/10	1.333		0.248
Age (y)	19.79±0.93	20.08±0.93		−1.086	0.283
OPS-C	102.63±3.63	87.67±2.90		15.765	𝑃<0.001
SDS	32.79±4.78	33.90±5.13		−0.750	0.616
SAS	30.67±3.37	31.24±5.37		−0.421	0.738

OPS-C: the Chinese version of the Optimism-Pessimism Scale; SDS: the Self-rating Depression Scale and; SAS: the Self-rating Anxiety Scale; M and SD stand for mean and standard deviation; 𝑃=0.05.