Thank you for your question about The Cognitive Symptoms of Depression, The cognitive symptoms of depression tend to receive less attention than other symptoms of this difficult illness. Namely, symptoms such as sinking mood, fatigue and loss of interest garner more recognition. Cognitive symptoms can interfere with all areas of a person’s life, including work, school and their relationships. Problem-solving and higher thinking, according to Serani, are greatly diminished. “This can leave a person feeling helpless and without a plan of action to defeat depression.” Poor concentration can cause problems with communication, and indecisiveness may strain relationships, i believe that such symptom has relation with Vitamin D , some Research has not yet clearly shown whether low levels of vitamin D cause depression, or whether depression causes low levels of vitamin D. This means that we don’t know whether taking a vitamin D supplement, or getting more vitamin D by exposing the skin to the sun, will help to prevent or ease the symptoms of depression in some people. Depression has many causes. It looks as if vitamin D deficiency is one of many causes. some tips you may use and helps : Move conversations to a quiet area with minimal distractions. Ask colleagues to speak about work matters in a private room rather than common spaces. Don’t answer your phone if you’re somewhere you’ll be distracted — let it go to voicemail so that you can listen to the call later and respond appropriately. Make a list of daily tasks you need to accomplish and cross them off as they’re completed. Use sticky notes as reminders in places where you’re sure to see them and write important reminders down immediately when they come to mind. Have a set place at home and at work to store everyday items, such as car keys and your cell phone. Take notes during meetings or use a recording device when appropriate so that you can review the information at a later time.