Added in collaboration with Wei Loong On myPersonality the scale is called 'Feeling Blue?'
Rarely or none of the time (less than 1 day per week)
Some or a little of the time (1-2 days per week)
Occasionally or a moderate amount of the time (3-4 days per week)
Most or all of the time (5-7 days per week)
On myPersonality: -1 means “user submitted a form with that question in but left it blank”, 0 means “user didn't submit a form with that question in” and 1, 2, 3, 4 are the response options.
Items 4, 8, 12 and 16 have to be reversed scored, but myPersonality already did that when collecting the data. Add up the ratings for all the items to obtain a total score.
Radloff, L. S. (1977). The CES-D Scale: a self-report depression scale for research in the general population. Applied Psychological Measurement, 1, 385-401. <Link>