In order to prevent confusion between the two papers in your own publication list, and on sites such as Google Scholar and ResearchGate, I would always change the title slightly. Only in cases where a conference paper is selected one-on-one for inclusion in a special issue of a journal it would be appropriate to maintain the exact same title.
Dear Ayesha, you can if only the conference will not publish your paper (or if you agree not to publish the paper with/at the conference proceedings). In any case, presenting a paper at a conference does not oblige to publish it there.
Many times you can enrich the paper with the comments, and the like that the paper generated.
My own advise is as follows: choose the way your paper: a) gets more visibility; b) the way that offers you a higher impact; c) the way you think you can be greater or higher rewarded.
Most journals that I know have the guide line not to accept papers that were already published or are in the process of being published in a Journal. Nonetheless, the answer to your question can best come from the Guide lines of the Journal you wish your paper to be published
You should check with the journal. Sometimes, they will admit a revised or extended version of an already published text. In general, I would try to only publish "preliminary thoughts" or something really short that is a mere manifestation of your speech in conference proceedings - in order to write an entirely new, much more extensive paper for a journal later.
Yes. Generally the scope for acceptance in a conference and journal are different. The general practice is to present the preliminary results in a conference. Since it is presented in front of knowledgeable crowd who are familiar with the subject get some inputs about your study, discussion and conclusions. Based on those comments rectify any mistakes identified, expand the scope and submit it for a journal. This is acceptable. But do not submit as it is.
You should do three things: 1. check with the conference, to see which copyrights you transferred, which you retained. If you transferred the right to publish, get the written consent of the conference organizers to use (part of) the text and figures in a new journal paper. 2. check the conditions of the journal you intend to submit to. Rules really differ per journal, depending on the dissemination of the conference version, the level to which the paper was extended/rewritten, the differences in audience/readership between the conference and the journal, etc. If uncertain you can contact the editor via mail to inquire about the journal's policy. 3. always, ALWAYS, disclose the earlier version, with explanation of the above points under 1 and 2, to the editor, for instance in the cover letter. Failure to do so may result in a reject, or after publication, in a retraction, which would hurt your academic career.
In order to prevent confusion between the two papers in your own publication list, and on sites such as Google Scholar and ResearchGate, I would always change the title slightly. Only in cases where a conference paper is selected one-on-one for inclusion in a special issue of a journal it would be appropriate to maintain the exact same title.
You can send the conference paper to a journal. But it is advisable to with some additional and fresh research investigation inputs. The best example in our development communication Everett Rogers. His subject innovations has developed on this formula only.
Another important thing is please do not forget to mention that you have presented this paper in a conference earlier.