Development or Refinement of Interface Artifacts or Techniques
Development or   Refinement of Interface Artifacts or Techniques concerns the on-going   development of new interface artifacts or the refinement of knowledge of   interface artifacts and techniques already well-known to the HCI   community. Your paper will likely include answers to the following   questions:
- Do   you provide context, where you      clearly review what is already known and what   limitations   exist in      knowledge about this artifact or technique?
 
- Do   you motivate a real problem that is      worth solving? For example, do you justify the   beneficial value of this      artifact or technique not only in   isolation but within the global context      of its expected uses?
 
- Do   you describe the artifact or technique in sufficient      detail for   others to replicate it?
 
- Do   you include a rigorous and convincing validation      of the   artifact/technique (e.g., empirical study, usability study, field        study as appropriate), where you clearly show that incremental gains not        only exist, but that the gains are of practical significance? 
 
Understanding Users
Understanding   Users contributes an analysis of people, their behaviors, their   situations and context, their perceptual, cognitive, and behavioral   capabilities, and/or their interaction with their artifacts. Such an   understanding forms the background of many HCI and software engineering   disciplines, where it serves to inspire and ground new design  directions  or where it forms the core of a requirements analysis. Your  paper will  likely include answers to the following questions:
- Do   you clearly describe the methodology and      mechanics behind the   analysis (e.g., ethnographic, field investigation,      interviews,   contextual inquiry).
 
- Do   you clearly describe what new understandings were      gained?
 
- Do   you show how the value of this new understanding      is relevant to   HCI, i.e., where it increases our understanding of human      behavior   as related to HCI, or how it adds insight into the organization      of   social settings, or by showing implications for design, or how it        causes us to reconsider prior perspectives of human behavior and   contexts      within HCI, or by helping us analyze other relevant   contexts? 
 
Systems,   Tools, Architectures and Infrastructure
Systems, Tools,   Architectures submissions contribute the underlying software and   technology associated with a novel interactive application, user   interface feature, user interface design, or development tool. Your   paper will likely include answers to the following questions: 
- Do   you show that the idea is original, of interest,      and valuable to a   reasonably broad subset of the CHI community?
 - Is the idea placed in context, where you detail the        expected situation, tasks and users?
 - Do you validate the idea, where validation can be by        sound argumentation, reflection of experiences, user studies, or   other      evidence proving its value?
 - Are you extremely clear about what has and has not        been implemented?
 - Do you provide sufficient information for an        experienced researcher to implement a similar system?
 - Can the system work within its proposed settings, or        are there significant obstacles to its use?
 - Do you validate the idea? For example, do you        demonstrate that it makes new or more functional interfaces practical or        the creation of existing interface techniques dramatically  easier?  Or do      you demonstrate performance gains that clearly  impact the  user experience?      Or do you reflect on experiences using  the  contribution to create      interfaces or provide other evidence  proving  its value? 
 
Methodology
Methodology   contributes a novel method or method variation that helps us design an   HCI artifact or evaluate an HCI artifact or setting. That is, it   improves how we do what we do. The method may be intended for use in   research or development settings (or both), but the paper should be   clear about the intended audience. Your paper will likely include   answers to the following questions: 
- Is   the methodology novel?
 - Do you show how the methodology builds on or        contrasts with related work?
 - Does the methodology have relevance and importance        to HCI practice and/or research?
 - Is the methodology described in sufficient detail so        that others can use it?
 - Has the value of the methodology been demonstrated,        e.g., by showing how it helps product design, development, and use,  or  by      demonstrating its use in a particular setting, or by   contrasting the      results obtained with a competing methodology, or   by showing how its use      improved the process it was intended to   address? 
 
Theory
Theory   submissions contribute principles, concepts, or models on which work in   HCI might be based. Your paper will likely include answers to the   following questions: 
- Is   the theory novel or a significant variation of an      existing theory?
 - Is the theory understandable by a general HCI        practitioner as well as an expert?
 - Do you show how the theory is situated with respect        to other theories, and how it builds upon them?
 - Does the theory have relevance and importance to HCI        practice and/or research?
 - Has the value of the theory been demonstrated, e.g.,        by showing how it helps describe, predict and/or influence the  design  of      an interactive application or setting?
 - Does the theory recast existing work in other areas        in a way that provides greater value to an HCI practitioner /   researcher? 
 
Innovation, Creativity and Vision
Innovation,   Creativity and contributes a significant innovation, vision or design   concept in how a user interface might appear, behave or be used, or a   new invention that significantly enables new styles of user interfaces.   While thought pieces are possible, proof of concept implementations and   demonstrations will be favoured. Your paper will likely include  answers  to the following questions: 
- Do   you clearly detail the idea?
 - Is the idea novel or a significant variation of an   existing      idea?
 - Do you convincingly describe the potential        significance and impact of this work, where you clearly argue about its        significance, how it enables a new class of user interfaces or  user       experiences, and how it can affect future generations of  users?
 - Do you suggest how the innovation, vision or design        might be adopted in practice, e.g., by reflection, by probes, or by   case      studies?
 - Do you stimulate thought on new ways to interact        with technology, or how new cultural meanings will be applied to the        technology we build? 
 
Experience
Experience   submissions contribute discussions of how HCI methods, theory, or tools   were applied to the design or development of an HCI artifact. They are   judged on the value of the experience to practitioners as well as to   researchers. Your paper will likely include answers to the following   questions: 
- Is the experience and its context   clearly described?
 - Is it significant? That is, will an experienced        person doing HCI work in a development organization learn something new        from this paper that they can apply to their practice?
 - If you are describing something that has been done        before, do you show that it has significant added value, e.g., a        combination of methods that is worth more than the individual ones, or        ironing out some practical problems in an academic method?
 - If you are describing something new or a variation        of an existing technique, do you show that it adds significant value,        preferably by real and convincing uses of it? 
 
Opinions
Opinions   contribute provocative essays. They present the author's well-supported   opinion about a topic of significant interest to a relatively broad   segment of the CHI community. They have well supported arguments,   including consideration of other perspectives, and/or data from research   or practice, if applicable. They are expected to have a stimulating   effect on the CHI community. Your paper will likely include answers to   the following questions: 
- Do   you clearly show that this is a topic of highly      significant   interest to a relatively broad segment of the CHI audience?
 - Is it provocative?
 - Will it have high impact to HCI? That is, will it        stimulate significant discussion and perhaps changes in our practices?
 - Is the opinion well founded? That is, is it well        argued? Is it well supported by facts? Does it consider the range of        current
 - Does it incorporate other opinions and consider them        in a balanced fashion? 
 
DO ensure that   even people who have little familiarity with your sub-area of HCI can   understand at least the main points: 
- what   questions you addressed,
 - why they're important, 
 - what methods you used (not necessarily the details),        
 - what your main results were, and 
 - why they are interesting.
 
In fact, even the experts in your area don't need to   understand more than these points; for the rest, they can read the   paper.