Final answer:
When assessing the effects of caffeine, questionnaire assessments should ask about mood, sleepiness, and feelings of stimulation from caffeine, as well as blood pressure and heart rate.
Step-by-step explanation:
When assessing the effects of caffeine, questionnaire assessments should ask about mood, sleepiness, and feelings of stimulation from caffeine, as these are commonly influenced by caffeine consumption. Additionally, it is important to assess blood pressure and heart rate as caffeine can have an impact on cardiovascular function. Dietary habits and exercise routine may also be relevant factors to consider when assessing the effects of caffeine, but they may not be directly related to the immediate effects of caffeine.