I need a free of charge and short questionnaire that measures mood states. The questionnaire will be used as in a neuropsychological evaluation study. It is well known that mood states can influence neuropsychological performance.
Some variation of the circumplex model of affect (Russell, 1980) or the Profile of Mood States are what I tend to use as they more effectively measure low arousal states (e.g., sadness, depression, calm) than the PANAS.