The size I use to detect the cause of this depression is writing an article from Dzulfikar Zacky. Here are three common causes of depression are explained by Zacky:

1. Psychology. Paranoid personality type and pessimists are prone to depression than those with other personality types.
2. High stress. Most people suffering from depression at the time through the tough times like losing a family member, broke up with girlfriend, lost jobs, environmental pressures and not all that bad.
3. Chemicals and drugs. Various chemicals such as alcohol can cause symptoms of depression, especially if the use of alcohol is already under addiction.

II. Are your expectations for the future?
0. I am not discouraged about the future.
1. I feel discouraged about the future.
2. I feel do not have anything to expect.
3. I feel that the future was hopeless and that things can not be improved.

III. Do you feel like a failure?
0. I do not feel like a failure.
1. I feel I’ve failed more than the average person.
2. When I look at the past, all I can see is a lot of failures.
3. I felt I was a total failure.

IV. Do you feel satisfaction in this life?
0. I get a lot of satisfaction from many things, as usual.
1. I do not enjoy things as usual.
2. I no longer get real satisfaction from every thing.
3. I am not satisfied and bored with everything.

V. Do you feel guilty about something?
0. I do not feel guilty.
1. I feel guilty in a fraction of time.
2. I feel a little guilty of most of the time.
3. I feel guilty about all the time.

VI. Does the failure that you’ve experienced as a punishment?
0. I do not feel being punished.
1. I was probably being punished.
2. I guess I was sentenced.
3. I felt I was being punished.

VII. Do you feel disappointed with yourself?
0. I do not feel disappointed in myself.
1. I am disappointed in myself.
2. I am disgusted with myself.
3. I hate myself.

VIII. Do you still have interest in other people?
0. I do not lose interest in other people.
1. I am less interested in other people than usual.
2. I lost most of my interest in other people.
3. I lost all my interest in other people.

IX. Are you able to make a decision?
0. I make decisions as good as I can.
1. I put off making decisions more than usual.
2. I am very difficult to make decisions than usual.
3. I can not make a decision at all.

X. Do you feel yourself to be worse than usual?
0. I do not feel look worse than usual /
1. I worry that I look old or unattractive.
2. I feel there are permanent changes in my appearance that make me look unattractive.
3. I am sure that I look bad.

XI. Are you able to work as usual?
0. I can work as well as usual.
1. I need an extra effort to start doing something.
2. I should really force yourself to do something.
3. I can not work at all.

XII. Are you able to sleep well?
0. I can sleep well usually.
1. I slept easier than usual.
2. I am tired after doing most of the work.
3. I was too tired to do anything.

XIII. Do you easily feel tired?
0. I do not feel tired more than usual.
1. I am more easily tired than usual.
2. I am tired after doing most of the work.
3. I was too tired to do anything.

XIV. Is your appetite decreased?
0. My appetite is not worse than usual.
1. My appetite is not as good as usual.
2. My appetite is much worse now.
3. I have no appetite at all.

XV. Do you always feel guilty?
0. I do not feel worse than others.
1. I am critical of myself for my weaknesses or mistakes.
2. I blame myself for my mistakes all the time.
3. I blame myself for every bad thing that happened.

XVI. Do you want to kill yourself?
0. I do not terfikir to commit suicide.
1. I thought of suicide but would not do it.
2. I want to kill myself.
3. I would kill myself if there is a chance.

XVII. Is this a feeling of health disorders?
0. I’m not more concerned about health than usual.
1. I am worried about physical problems such as aches and pains or stomach upset or kontipasi.
2. I am very worried about physical problems, and it’s hard to think of many other things.
3. I was so worried about my physical problems, so I do not dapay doing other things.

XVIII. Do you always cry?
0. I do not cry anymore than usual.
1. I cry more now than usual.
2. I cried all the time now.
3. I’m usually able to cry, but now I can not cry even if I wanted.

XIX. Do you still have an interest in sex?
0. I did not notice any change in interest in sex lately.
1. I am less interested in sex than usual.
2. I was less interested in sex now.
3. I really lost interest in sex.

XX. Is this you feel upset?
0. Now I am no more irritated than usual.
1. I am more easily distracted or upset than usual.
2. Now I feel irritated all the time.
3. I was not made at all upset by things that usually make me upset.

XXI. Do you feel your weight down?
0. If there is weight loss, I am not much experienced lately.
1. My weight decreased more than 2.5 Kg.
2. My weight decreased more than 5 Kg.
3. My weight decreased more than 7.5 Kg.

Score:
0 to 9: Normal.
10 to 15: Symptoms of Depression Light.
16 to 19: Medium Light Depression Symptoms.
20 to 29: Symptoms of Depression Medium Weight.
30: Symptoms of Depression Weight.

Excerpted from examination Beck For Depression Screening.