We often get asked in questionnaires/surveys to rate our 'satisfaction' with xyz...

We promptly tick one of [not at all, so-and-so, a little, yes, very happy].

I read that there is a hormone (dopamine?) associated with 'feeling' satisfied. And addictive drugs (ยาบ้า) raise this hormone level to a point where addicts are overwhelmed and need more to be satisfied.

Is there a 'sad' hormone produced when we feel sad? Angry hormone? Proud hormone?

We do recognize 'feeling' sad, disappointed, satisfied, happy, angry, ... so these feelings have at least 'on-off' levels (binary measure). If we are asked to rate our satisfaction, why can't we rate sadness, love, hate, ...?

Comparisons of individuals' 'on' levels may be difficult now (because of our lack of understanding of characters/attributes of 'feeling'?) but can we make it possible or easier in some way? Don't we have IQ tests, competency tests,..., and temperature tests (thermometers) for what we feel?

Note. We can do a lot with binary measure, we use binary bits in computers. ;=)

Great pictures!