Table 1.

Factor loadings from the principal component analysis (PCA) of subjective effect measures.

	MDMA dose
	0.75 mg/kg				1.5 mg/kg
	Euphoria	Sociability	Anxiety	Dizziness	Euphoria	Sociability	Anxiety	Dizziness
VAS scale
High	0.80				0.86
Feel	0.82				0.82
Like	0.86				0.78
More	0.81				0.69
Friendly		0.81				0.95
Sociable		0.89				0.83
Confident		0.86				0.80
Playful		0.88				0.79
Loving		0.63				0.79
Restless			0.98				0.79
Anxious			0.74				0.85
Dizzy				0.94				0.97